US Pat. No. 9,282,628

COMPONENT BUILT-IN BOARD AND METHOD OF MANUFACTURING THE SAME

FUJIKURA LTD., Tokyo (JP...

1. A component built-in board that has stacked therein a plurality of printed wiring bases in which a wiring pattern and a
via are formed on/in an insulating base and that is configured having an electronic component built in thereto, wherein
at least two layers of the plurality of printed wiring bases are disposed on a rear surface side which is an opposite side
to an electrode formation surface side of the electronic component;

the at least two layers of the printed wiring bases disposed on the rear surface side of the electronic component include
a heat radiation-dedicated wiring pattern as the wiring pattern that is disposed in multiple layers via the insulating base
on a region above the rear surface of the electronic component;

the heat radiation-dedicated wiring pattern is formed such that a heat radiation-dedicated wiring line and a signal-dedicated
wiring line are continuous;

the via includes a plurality of heat radiation-dedicated vias that are disposed on the region above the rear surface to connect
the rear surface of the electronic component and the heat radiation-dedicated wiring pattern disposed in multiple layers;
and

the heat radiation-dedicated wiring pattern is continuous from a place where connected to the heat radiation-dedicated via
to be connected also to another via disposed at an outer peripheral side of the electronic component.

US Pat. No. 9,429,708

OPTICAL-FIBER-SPLICED PORTION REINFORCING HEATING DEVICE

FUJIKURA LTD., Tokyo (JP...

1. An optical-fiber-spliced portion reinforcing heating device comprising:
paired clamps that respectively grasp one portion and the other portion of a coated portion of an optical fiber, the optical
fiber including a fusion-spliced portion, the fusion-spliced portion being coated with a sleeve, the coated portion being
exposed from the sleeve;

at least two or more heaters that are arranged to face each other so as to sandwich the sleeve;
a first force-applying member that presses at least one of the paired clamps so as to apply a tension to the optical fiber;
and

a second force-applying member that applies a pressing force to at least one or more of the heaters via the sleeve by use
of one of an elastic member and a magnetic member in accordance with control of a drive source, the heaters being arranged
to face each other with the sleeve interposed therebetween, wherein

a pressing force that is to be applied to the sleeve by the second force-applying member is set to be greater than a tension
that is to be applied to the optical fiber by the first force-applying member,

both the paired clamps are movable back and forth in the longitudinal direction of the optical fiber,
before the optical fiber is grasped, in a state in which one of the paired clamps is separated from the heaters by the first
force-applying member and in a state in which the other of the paired clamps moves forward to the heater side and is stopped
before the optical fiber is grasped,

after the paired clamps grasp the optical fiber, the other of the paired clamps starts to move in a backward movement direction
away from the heater side, one of the paired clamps moves in a forward movement direction which is due to a tension transmitted
through the optical fiber, movement of the other of the paired clamps is stopped at a position away from an end of a movable
range of one of the paired clamps,

therefore, in a state in which the tension is applied to the optical fiber, in one of the paired clamps, a backward movable
range in a direction away from the heaters in the longitudinal direction of the optical fiber is ensured and a forward movable
range that allows movement to the heater side is ensured, and one of the paired clamps is thereby configured to move in a
direction in which a tension that is applied to the optical fiber as a result of pressing the sleeve by the heaters and by
the second force-applying member is diminished.

US Pat. No. 9,164,245

OPTICAL CONNECTOR

FUJIKURA LTD., Tokyo (JP...

1. An optical connector comprising:
a ferrule within which an integrated optical fiber is fixed;
a clamp portion disposed at a rear of the ferrule, the clamp portion comprising:
a first lid component;
a second lid component; and
a base component comprising a first facing surface which faces the first lid component and a second facing surface which is
disposed at a rear of the first lid component and faces the second lid component;

wherein the clamp portion is configured to clamp an abutting portion of a naked optical fiber at an end of an inserted optical
fiber inserted from a rear of the clamp portion and the integrated optical fiber between the base component and the first
lid component; and

wherein the clamp portion is further configured to clamp a portion of the inserted optical fiber having a coating between
the base component and the second lid component; and

a naked optical fiber guide portion disposed between the first facing surface and the second facing surface on the base component,
and having a first through hole through which the naked optical fiber can be inserted, a second through hole which guides
the portion of the inserted optical fiber having a coating toward the first through hole, and a tapered portion disposed between
the first through hole and the second through hole so as to be continuous and coaxial with the first through hole and the
second through hole and the tapered portion having a cross-section which becomes gradually smaller from the second through
hole toward the first through hole,

wherein the base component comprises an alignment groove formed in the first facing surface of the base component thereby
aligning the abutting portion of the naked optical fiber and the integrated optical fiber, and the first through hole of the
naked optical fiber guide portion continues to a rear end of the alignment groove, and

wherein the naked optical fiber is guided by the first through hole to the alignment groove of the base component.

US Pat. No. 9,065,183

LEAKY COAXIAL CABLE

FUJIKURA LTD., Tokyo (JP...

1. A leaky coaxial cable comprising:
a central conductor;
an insulator covering the central conductor;
an external conductor wound around the insulator, having a thickness of 5 ?m to 44 ?m, and including a plurality of slots
formed periodically in a longitudinal direction of the cable;

a plastic film attached to the external conductor and having a thickness of 5 ?m to 36 ?m; and
an outer sheath covering the external conductor and the plastic film,
wherein the plastic film is attached to a surface of the external conductor facing the outer sheath,
the external conductor has a width that forms an overlapping portion in which ends of the external conductor overlap and contact
with each other when the external conductor is wound around the insulator,

the width of the external conductor is longer by 2 mm to 10 mm than an outer peripheral length of the insulator, and
edges of the slots bite a surface of the insulator.

US Pat. No. 9,069,116

FAN-IN/FAN-OUT DEVICE FOR MULTICORE FIBER

FUJIKURA LTD., Tokyo (JP...

1. A fan-in/fan-out device for multicore fiber that is connected to a first end portion of a multicore fiber which comprises
a plurality of first cores and a first cladding covering the plurality of the first cores,
the fan-in/fan-out device comprising a plurality of single-core fibers which are connected to the plurality of the first cores
of the multicore fiber and which comprise an elongated portion extending in a longitudinal direction so as to reduce a diameter
and being connected to the first end portion of the multicore fiber at a second end portion in an extending direction of the
elongated portion, wherein:

a refractive index distribution of each of the single-core fibers has a single peak;
a relative refractive index difference of a second core with respect to a second cladding in each of the single-core fibers
is 0.8% or more; and

a second mode field diameter of the second end portion of the elongated portion is greater than a first mode field diameter
of the first end portion of the multicore fiber.

US Pat. No. 9,057,813

OPTICAL FIBER

FUJIKURA LTD., Tokyo (JP...

1. An optical fiber, comprising:
a core provided at a central portion;
an internal cladding coat provided around the core, having a refractive index less than a refractive index of the core;
a trench coating provided at a periphery of the internal cladding coat and constituted of two or more layers having different
refractive indices; and

an outermost cladding coat provided at a periphery of the trench coating, wherein
a layer having the highest refractive index in the trench coating configures an outermost layer of the trench coating,
?core>?ic>?tmax>?tmin, ?0.15%??tmax>?tmin??0.7%, and
0.45?(rtmax?rin)/(rout?rin)?0.9 are satisfied where a relative refractive index difference of the core is represented as ?core, a relative refractive index difference of the internal cladding coat is represented as ?ic, a relative refractive index difference of a layer having the highest refractive index in the trench coating is represented
as ?tmax, a relative refractive index difference of a layer having the lowest refractive index in the trench coating is represented
as ?tmin, a radius of an internal edge of the trench coating is represented as rin, a radius of an external edge of the trench coating is represented as rout, and a radius of an internal edge of a layer having the highest refractive index in the trench coating is represented as
rtmax and where the relative refractive index differences are based on a refractive index of the outermost cladding coat.

US Pat. No. 9,335,489

MANUFACTURING METHOD FOR OPTICAL MODULE

FUJIKURA LTD., Tokyo (JP...

1. A method of manufacturing an optical module in which an optical fiber is fixed to two fixing portions, the method comprising:
a first fixing step of fixing a part of the optical fiber to one fixing portion; and
a second fixing step of applying tension F by pulling the optical fiber while a base connected to the respective fixing portions
has been heated to an upper limit or higher of guaranteed temperature of the optical module, and fixing the other part of
the optical fiber to the other fixing portion,

wherein when tmax denotes the upper limit of the guaranteed temperature, tbase denotes the temperature of the base heated in the second fixing step, k1 denotes an equivalent linear coefficient of expansion of the base, k2 denotes a linear coefficient of expansion of the optical fiber, A denotes the cross-sectional area of the optical fiber, E
denotes the Young's modulus of the optical fiber, and F denotes the tension,

0
is satisfied.

US Pat. No. 9,304,254

SUBSTRATE-TYPE WAVEGUIDE ELEMENT AND OPTICAL MODULATOR

FUJIKURA LTD., Tokyo (JP...

1. A substrate-type waveguide element comprising:
a lower cladding;
a first core and a second core which are provided on the lower cladding; and
an upper cladding provided on the lower cladding so as to bury the first core and the second core,
a TM polarized wave inputted into the first core being outputted from the second core,
a cross section of a first segment of the first core having a step-like shape including a quadrilateral shape of a main part
and a quadrilateral shape of a protruding part protruding from the main part, so that an effective refractive index of a TE
polarized wave in the first segment of the first core differs from an effective refractive index of a TE polarized wave in
a first segment of the second core, the first segment of the second core being parallel to the first segment of the first
core.

US Pat. No. 9,585,238

PRINTED CIRCUIT BOARD

FUJIKURA LTD., Tokyo (JP...

1. A printed circuit board which is used in a bent state, comprising:
a substrate;
a first conductive layer which is formed on the substrate;
a first insulation layer which is formed on the substrate so as to cover the first conductive layer; and
a second conductive layer which is formed on the first insulation layer,
wherein Young's modulus of the first insulation layer is Ei1, a fracture elongation of the second conductive layer is Bc2,
and the following equations (I) and (II) are satisfied:

10 MPa
Bc2?10%  (II).

US Pat. No. 9,188,735

OPTICAL FIBER, OPTICAL TRANSMISSION LINE, AND METHOD FOR MANUFACTURING OPTICAL FIBER

FUJIKURA LTD., Tokyo (JP...

1. An optical fiber comprising:
an inner core whose refractive index distribution has an ? profile;
an outer core which surrounds the inner core; and
a clad which surrounds the outer core,
the optical fiber having Rd of not less than 0.15 where Rd is a ratio of a relative refractive index difference between the
outer core and the clad to a relative refractive index difference between a center part of the inner core and the clad,

wherein the optical fiber is configured to transmit light in a fundamental mode and, when a wavelength of incident light is
1.55 ?m, to transmit light in a second-order mode.

US Pat. No. 9,349,502

AUTOMOTIVE WIRE

FUJIKURA LTD., Tokyo (JP...

1. An automotive wire, comprising:
a conductor including at least one solid wire composed of a core and a metal film that covers a surface of the core; and
an insulator that covers the conductor,
a nickel plating layer between the core and the metal film,
wherein the core is composed of carbon steel,
the metal film has a thickness of 12.4 ?m to 19.6 ?m,
the nickel plating layer has a thickness of 0.2 ?m to 0.4 ?m and
the metal film covers the entire nickel plating layer so that the inner peripheral surface of the metal film is in contact
with the entire outer peripheral surface of the nickel plating layer.

US Pat. No. 9,122,036

OPTICAL FIBER CLAMP AND METHOD OF CLAMPING OPTICAL FIBER

FUJIKURA LTD., Tokyo (JP...

1. A device for setting an optical fiber in place, comprising:
a pedestal capable of supporting the optical fiber;
a clamper having the optical fiber gripped between the clamper and the pedestal; and
a pressure device capable of pressing the clamper so as to pressurize the optical fiber to the pedestal,
wherein the pressure device comprises a first elastic member bearing a first clamping load, a second elastic member bearing
a second clamping load less than the first clamping load, and a limiter device limiting a deformation range of the second
elastic member,

wherein the second elastic member is first compressed when a load acts on the pressure device by the second clamping load
of the second elastic member, and, after the second elastic member reaches a limit of a degree of compression, the first elastic
member is compressed by the first clamping load of the first elastic member.

US Pat. No. 9,072,208

MULTI-LAYER WIRING BOARD AND METHOD OF MANUFACTURING THE SAME

FUJIKURA LTD., Tokyo (JP...

1. A multi-layer wiring board, comprising: a plurality of multi-layer wiring units each having a plurality of printed wiring
boards stacked therein via an adhesive layer, the printed wiring board having a wiring layer formed on an insulating base
therein and having flexibility, and the wiring layers being connected to each other via a via that penetrates in a stacking
direction; and a cable unit connecting between the plurality of multi-layer wiring units and having flexibility, the cable
unit configured having a lower insulating base, the wiring layer formed on the lower insulating base and an upper insulating
base disposed above the lower insulating base via the adhesive layer, the lower insulating base and the wiring layer correspond
to one-layer of the printed wiring board, and the lower and upper insulating bases and the wiring layer being led out from
the multi-layer wiring units, wherein the upper insulating base includes the wiring layer formed on an upper surface of the
upper insulating base in the multi-layer wiring units; and wherein the cable unit has provided therein an empty space where
the adhesive layer has been removed, the empty space being provided between those of the insulating bases adjacent in the
stacking direction that do not have the wiring layer formed therebetween.

US Pat. No. 9,228,890

METHOD OF MEASURING ACOUSTIC DISTRIBUTION AND DISTRIBUTED ACOUSTIC SENSOR

FUJIKURA LTD., Tokyo (JP...

1. A method of measuring an acoustic distribution, the method comprising:
using a distributed acoustic sensor which comprises:
a light source unit which is capable of emitting optical pulses at two or more emission wavelengths;
an optical fiber which comprises two or more fiber Bragg gratings disposed between a first end of the optical fiber and a
second end of the optical fiber along a longitudinal direction of the optical fiber, the first end being close to the light
source unit and the second end being far from the light source unit;

an optical receiver unit, which receives a reflection light emitted from the light source unit and reflected at one or more
of the two or more fiber Bragg gratings and which converts the reflection light to a reflection signal by an optical to electrical
conversion;

a light branching unit which separates a light output from the light source unit into a measurement light which is directed
to the two or more fiber Bragg gratings and a reference light which is to be converted to a reference signal by an optical
to electrical conversion without reaching any of the two or more fiber Bragg gratings; and

a signal processing unit analyzing the reflection signal and the reference signal; and
calculating acoustic frequencies for all of the two or more fiber Bragg gratings disposed at the optical fiber to determine
an acoustic distribution along the longitudinal direction of the optical fiber, by repeating a measurement step more than
two times while changing an emission wavelength of the light source unit, the measurement step comprising:

outputting the two or more optical pulses from the light source unit to the optical fiber at intervals, two or more optical
pulses having one emission wavelength selected from among the two or more emission wavelengths;

identifying a fiber Bragg grating, which reflects the reflection light corresponding to the reflection signal, among the two
or more fiber Bragg gratings by the signal processing unit based on a time difference between when the reflection signal is
detected and when the reference signal is detected in a case where a reflection signal intensity obtained by the optical receiver
unit is over a predetermined threshold value, and obtaining a temporal change of a reflection signal intensity at the identified
fiber Bragg grating; and

calculating an acoustic frequency at the identified fiber Bragg grating based on the temporal change of the reflection signal
intensity, wherein:

at the light source unit, a difference of two different emission wavelengths arbitrarily selected from among the two or more
fiber Bragg gratings is greater than a maximum value ??a of a wavelength width of an optical pulse output at each of the two
or more emission wavelengths; and

at the optical fiber, a minimum value ??b of a reflection bandwidth of the two or more fiber Bragg gratings is greater than
the maximum value ??a of the wavelength width.

US Pat. No. 9,063,304

FERRULE AND FERRULE WITH OPTICAL FIBER

FUJIKURA LTD., Tokyo (JP...

1. A ferrule for optically connecting an optical fiber to an optical part, the ferrule comprising:
a boot accommodating hole which is configured to accommodate a boot attached to the optical fiber and which is formed on a
rear end surface of the ferrule;

an optical fiber hole which is configured to position an intermediate portion of the optical fiber having a predetermined
outer diameter and which extends forward from a front end of the boot accommodating hole; and

a recess configured for an adhesive to be disposed therein and comprising a first inner wall from which a front end of the
optical fiber positioned by the optical fiber hole is protrudable, and a second inner wall opposite to the first inner wall,
wherein:

the second inner wall is configured to be abutted by substantially an entire area of a front end surface of the optical fiber;
a bottom of the recess is positioned lower than a lower edge of the front end of the optical fiber that protruded from the
first inner wall; and

the recess comprises an adhesive application slot with an opening larger than the distance between the first inner wall and
the second inner wall, the first inner wall comprising a first inclined surface, and the second inner wall comprising a second
inclined surface which does not reach a front face of the ferrule; and

a distance between the first inner wall and the second inner wall is more than or equal to half of the outer diameter of the
optical fiber and less than or equal to four times the outer diameter of the optical fiber.

US Pat. No. 9,121,995

OPTICAL FIBER HAVING HOLES

FUJIKURA LTD., Tokyo (JP...

1. An optical fiber, having a cross sectional configuration having a core region, a first clad region arranged around the
core region, and a second clad region arranged around the first clad region,
each of the first clad region and the second clad region having holes which have identical diameters and are periodically
formed so that the first clad region and the second clad region each have an effective refractive index lower than a refractive
index of the core region,

the first clad region having a single layered group(s) of holes, the second clad region having N layered group(s) of holes
(N is a given natural number),

a group of holes of a first layer, out of the 1+N layered groups of holes, being made up of eight holes arranged on a regular
octagon, in which a distance between a center and respective eight apexes is ?, the first layer being a layer which is closest
to the core region, a group of holes of a j-th layer, out of the 1+N layered groups of holes, as counted from the first layer,
being made up of 6×j holes arranged on a regular hexagon in which a distance between a center and respective six apexes is
?×j, where j is a natural number of not less than 2 but not more than 1+N, and

a ratio d/? of a diameter d of the holes in the second clad region to a center distance ? of any adjacent holes in the second
clad region is not more than 0.521, wherein any adjacent holes in the second clad region have a center distance ? of not less
than 12.6 ?m; and

wherein (0.01125/?m)×?+0.3455?d/??(0.00375/?m)×?+0.4625.

US Pat. No. 9,081,129

MULTI-CORE FIBER

FUJIKURA LTD., Tokyo (JP...

1. A multi-core fiber comprising:
an even number of six or more of cores; and
a clad surrounding outer circumferential surfaces of the cores, wherein:
the even number of cores are formed of two types of cores between which an effective refractive index difference in a fundamental
mode is different;

in the cores, the two types of cores are alternately disposed at regular spacings, and the cores are annularly disposed at
an interior angle formed of lines connecting centers of the cores adjacent to each other, the interior angle being greater
than an angle of 90°;

a difference in a mode field diameter of light propagating through the cores is 1 ?m or less; and
an expression is satisfied:
1.450×10?5×D??neff?0.002
wherein an inter-center pitch between the cores adjacent to each other is D ?m and an effective refractive index difference
between the cores adjacent to each other is ?neff.

US Pat. No. 9,055,676

DIFFERENTIAL SIGNAL TRANSMISSION CIRCUIT AND METHOD FOR MANUFACTURING SAME

FUJIKURA LTD., Tokyo (JP...

1. A differential signal transmission circuit, comprising:
an insulating layer;
two first conductive seed layers in parallel formed on one surface of the insulating layer;
two signal lines provided in parallel on the first conductive seed layers and having the same pattern as the first conductive
seed layers;

a second conductive seed layer formed on each of outer sides of the first conductive seed layers on the one surface of the
insulating layer;

a GND line formed on each of outer sides of the two signal lines on the second conductive seed layer and having the same pattern
as the second conductive seed layer; and

a wiring line layer formed on the other surface of the insulating layer,
the differential signal transmission circuit being configured by a double-sided flexible printed circuit board,
the signal lines, the first conductive seed layers, the GND line, the second conductive seed layer, and the wiring line layer
being formed by a semi-additive method on the insulating layer, and

the signal line and the GND line being formed such that a distance S between the two signal lines is greater than a distance
D between the GND line and one of the two signal lines located closer to the GND line.

US Pat. No. 9,306,274

ANTENNA DEVICE AND ANTENNA MOUNTING METHOD

FUJIKURA LTD., Tokyo (JP...

1. An antenna device, comprising:
an antenna including a radiating element and an internal ground;
a coaxial cable whose internal conductor is connected with the radiating element and whose external conductor is connected
with the internal ground; and

an external ground connected with the external conductor of the coaxial cable,
wherein the antenna, which is an inverted F antenna, further includes a short-circuit section for short-circuiting the radiating
element and the internal ground,

wherein the radiating element includes:
a first straight line section extending from a power supply section in a direction opposite to a direction in which the coaxial
cable is drawn out, the power supply section being connected with the internal conductor of the coaxial cable; and

a second straight line section connected via a first intermediary section with an end of the first straight line section which
end is farther from the power supply section and extending from the first intermediary section in the direction in which the
coaxial cable is drawn out, and

wherein the short-circuit section includes:
a third straight line section extending from the power supply section in the direction opposite to the direction in which
the coaxial cable is drawn out; and

a fourth straight line section connected via a second intermediary section with an end of the third straight line section
which end is farther from the power supply section and extending from the second intermediary section in the direction in
which the coaxial cable is drawn out, and an end of the fourth straight line section which end is farther from the second
intermediary section is connected with the internal ground.

US Pat. No. 9,274,154

ELECTROSTATIC CAPACITANCE SENSOR AND METHOD FOR DETERMINING FAILURE OF ELECTROSTATIC CAPACITANCE SENSOR

FUJIKURA LTD., Tokyo (JP...

1. An electrostatic capacitance sensor comprising:
a detection electrode that detects an electrostatic capacitance between the detection electrode and an object;
a shield electrode that is disposed in vicinity of the detection electrode;
a shield drive means that switches between a first electric potential and a second electric potential different from the first
electric potential to apply the first or second electric potential to the shield electrode, wherein the first electric potential
and the second electric potential are different from a ground potential, and the shield drive means is connected to the shield
electrode;

a detection means that outputs a detection signal depending on the electrostatic capacitance detected by the detection electrode,
wherein the detection means is connected to the detection electrode; and

a determination means that obtains a first detection signal and a second detection signal from the detection means as a basis
to determine whether an abnormality of the detection electrode and/or the shield electrode is present or absent, the first
detection signal depending on the electrostatic capacitance detected by the detection electrode when the shield drive means
applies the first electric potential to the shield electrode, the second detection signal depending on the electrostatic capacitance
detected by the detection electrode when the shield drive means applies the second electric potential to the shield electrode.

US Pat. No. 9,134,485

OPTICAL CONNECTOR CLEANING TOOL

FUJIKURA LTD., Tokyo (JP...

1. An optical connector cleaning tool that wipes away and cleans a joining end face of an optical connector by a cleaning
body that is fed and moved, the optical connector cleaning tool comprising:
a feeding mechanism that performs supply and take-up of the cleaning body;
a housing body that houses the feeding mechanism;
an extension portion that extends from the housing body; and
a head member that presses the cleaning body against the joining end face at the distal end of the extension portion, wherein:
the extension portion comprises a plurality of distal end tube portions, the head member being passed through each distal
end tube portion, and an outer tube body through which the distal end tube portions are passed;

the plurality of distal end tube portions are extended from distal end openings of the outer tube body;
the distal end openings are formed so that the plurality of distal end tube portions that pass through the distal end openings
are movable in directions of approaching and separating from each other

the outer tube body has a plurality of passing-through holes that are respectively capable of passing the plurality of distal
end tube portions; and

the distal end openings are formed at the distal end of the plurality of passing-through holes.

US Pat. No. 9,069,118

OPTICAL FAN-IN/FAN-OUT DEVICE

FUJIKURA LTD., Tokyo (JP...

1. An optical fan-in/fan-out device comprising:
a plurality of relay fibers; and
an outer circumference clad which is integrated with each of the plurality of relay fibers to fill a space between the relay
fibers and to surround a circumference surface of each relay fiber,

wherein the relay fiber includes:
a first core;
a second core which has a refractive index lower than a refractive index of the first core and surrounds a circumference surface
of the first core without clearance; and

a clad which has a refractive index lower than a refractive index of the second core and surrounds a circumference surface
of the second core without clearance,

the outer circumference clad has a tapered portion by which the plurality of relay fibers is shrunk in diameter from one end
side toward the other end side, and

in a case where a radius of the first core in a large-diameter end surface of the tapered portion is denoted by r1S, a radius of the second core in the large-diameter end surface is denoted by r2S, a relative refractive index difference of the first core with respect to the clad is denoted by ?1, a relative refractive index difference of the second core with respect to the clad is denoted by ?2, a refractive index volume of the first core expressed by r1S2×?1is denoted by V1S, and a refractive index volume of the second core expressed by ?(r2S2?r1S2)×?2 is denoted by V2S, the following equation is satisfied;

3?r2S/r1S?5

1.07r2S?13.5?V2S/V1S?1.07r2S?11.5

r2S/r1S?3×?1/?2+10.

US Pat. No. 9,635,763

COMPONENT BUILT-IN BOARD MOUNTING BODY AND METHOD OF MANUFACTURING THE SAME, AND COMPONENT BUILT-IN BOARD

FUJIKURA LTD., Tokyo (JP...

1. A component built-in board mounting body that has a component built-in board mounted on a mounting surface of a mounting
board, the component built-in board being configured having stacked therein, in a stacking direction, a plurality of printed
wiring bases that each have a wiring pattern and a via, the wiring pattern being formed on a resin base thereof and the via
being formed in the resin base thereof, and the component built-in board being configured having an electronic component built
in thereto,
wherein the component built-in board has at least a portion of the plurality of printed wiring bases including thermal wiring
in the wiring pattern and including a thermal via in the via,

wherein the thermal wiring and the thermal via are partially disposed at a position outside an outer periphery of the electronic
component in a direction orthogonal to the stacking direction, and

wherein the component built-in board is mounted on the mounting board via a bump formed on a surface layer of the component
built-in board, and an opposite surface on an opposite side to an electrode formation surface of the built in electronic component
is connected to the bump via the thermal via, the thermal wiring, and the thermal wiring and the thermal via disposed at the
position outside the outer periphery of the electronic component, and is thermally connected to the mounting board via the
bump,

wherein one printed wiring base of the plurality of printed wiring bases includes an opening receiving the electronic component,
the thermal via disposed at the position outside the outer periphery of the electronic component penetrates the one printed
wiring base in the stacking direction.

US Pat. No. 9,358,512

FLUID CONTROL DEVICE AND FLUID MIXER

FUJIKURA LTD., Tokyo (JP...

1. A fluid control device for mixing liquids, comprising:
a monolithic base body;
first micro holes, which are disposed in the base body, belonging to a flow channel group ? that configures a specific group
and having opening portions in a region A and a region B on surfaces being outer surfaces of the base body; and

second micro holes, which are disposed in the base body, belonging to in a flow channel group ? (n) that configures an other
specific group and having opening portions in the region A and a region C (n) on the surfaces being outer surfaces of the
base body, wherein

in the base body, the first micro holes are disposed apart from the second micro holes throughout entire lengths,
the first micro holes are three-dimensionally intersected to each other or bent between the region A and the region B,
the second micro holes are three-dimensionally intersected to each other or bent between the region A and the region C,
the opening portions in the region A are outlets of the liquids, and the region A is positioned on an upper surface of the
monolithic base body, and

the n refers to a natural number.

US Pat. No. 9,330,854

DYE-SENSITIZED SOLAR CELL AND PROCESS OF MANUFACTURING SAME, DYE-SENSITIZED SOLAR CELL MODULE AND PROCESS OF MANUFACTURING SAME

FUJIKURA LTD., Tokyo (JP...

1. A dye-sensitized solar cell comprising:
a first electrode comprising a transparent substrate and a transparent conductive film that is provided on the transparent
substrate;

a second electrode that faces the first electrode and comprises a metal substrate formed of a metal capable of forming a passivation
film;

an oxide semiconductive layer that is provided on the first electrode or the second electrode;
an electrolyte that is provided between the first electrode and the second electrode;
a sealing section that bonds the first electrode and the second electrode; and
a connection member that is provided on the surface of the second electrode on the opposite side of the first electrode and
is formed of a metal having lower resistance than the metal that constitutes the metal substrate,

wherein an alloy section formed from an alloy of the metal that constitutes the metal substrate and the metal that constitutes
the connection member, is provided between the second electrode and the connection member.

US Pat. No. 9,223,083

MULTICORE FIBER

FUJIKURA LTD., Tokyo (JP...

1. A multicore fiber comprising:
a plurality of cores;
a cladding that encloses the plurality of the cores; and
a marker disposed in the cladding, wherein
the plurality of the cores is arranged and disposed on a linear line passed through a center of the cladding, and
the marker is disposed along in a length direction of the cladding on a portion on which the marker does not overlap the cores
in a first direction in which the plurality of the cores is arranged on the linear line and the marker does not overlap the
core in a second direction orthogonal to the first direction so that the marker is visually recognizable from the first direction
and the second direction.

US Pat. No. 9,175,946

MEASURING METHOD OF HOLE DIAMETER, HOLE POSITION, HOLE SURFACE ROUGHNESS, OR BENDING LOSS OF HOLEY OPTICAL FIBER, MANUFACTURING METHOD OF HOLEY OPTICAL FIBER, AND TEST METHOD OF OPTICAL LINE OF HOLEY OPTICAL FIBER

NIPPON TELEGRAPH AND TELE...

1. A manufacturing method of a holey optical fiber, comprising:
manufacturing a holey optical fiber by melting and drawing an optical fiber preform formed with holes; and
measuring a hole diameter of the holey optical fiber by using a hole diameter-measuring method,
the hole diameter-measuring method comprising:
preparing first holey optical fibers with different first hole diameters;
obtaining first arithmetical mean values as a result of calculating a first arithmetical mean value I(xp1) from two backscattering light intensities at a position xp1 of two backscattering light waveforms of each of the first holey optical fibers, in which the two backscattering light waveforms
are obtained by OTDR measurement;

obtaining first mode field diameters, each of which is defined by a first mode field diameter 2W(xp1) which is calculated by using the first arithmetical mean value I(xp1) and formula (3) or formula (4);

2W(x)=2W(x0)·10(·(I(x)·I(x0))+k)/20)  (3)

2W(x0): a mode field diameter at a position x0 of an optical fiber for reference or a first terminal point of each of the holey optical fibers;

I(x0): an arithmetical mean value at the position x0 of the optical fiber for reference or the first terminal point of each of the holey optical fibers;

k: a constant expressed by the following formula;2W(x)=2W(x0)·[2W(x1)/2W(x0)]((I(x)·I(x0))/(I(x1)·I(x0)))  (4)

2W(x0): a mode field diameter at the position x0 of the optical fiber for reference or the first terminal point of each of the holey optical fibers;

2W(x1): a mode field diameter at a position x1 of the optical fiber for reference or a second terminal point of each of the holey optical fibers;

I(x0): an arithmetical mean value at the position x0 of the optical fiber for reference or the first terminal point of each of the holey optical fibers;

I(x1): an arithmetical mean value at the position x1 of the optical fiber for reference or the second terminal point of each of the holey optical fibers;

obtaining the first hole diameters of the first holey optical fibers, the first hole diameters being actually measured using
an offline measurement method;

drawing a graph by obtaining datapoints, each of which is defined by each of the obtained first mode field diameters and each
of the obtained first hole diameters;

acquiring a relational expression (5) between the obtained first mode field diameters and the obtained first hole diameters
as a result s of approximating the datapoints by a linear function;

d?a1+a2×2W  (5)

d: a hole diameter;
a1: a first constant value obtained by approximating the datapoints by the linear function;

a2: a second constant value obtained by approximating the datapoints by the linear function;

preparing a second holey optical fiber which is different from the first holey optical fibers;
calculating a second arithmetical mean value I(xp2) from two backscattering light intensities at a position xp2 of two backscattering light waveforms of the second holey optical fiber, in which the two backscattering light waveforms are
obtained by OTDR measurement;

obtaining a second mode field diameter 2W(xp2) using the second arithmetical mean value I(xp2) and formula (3) or formula (4); and

obtaining a second hole diameter at the position xp2, based on the second mode field diameter 2W (xp2) and the relational expression (5).

US Pat. No. 9,079,267

DEVICE AND METHOD FOR APPLYING ELECTRIC DISCHARGE ON OPTICAL FIBER

FUJIKURA LTD., Tokyo (JP...

1. A device for applying electric discharge on an optical fiber by a first and a second electrode, both of which are perpendicular
to an axial direction of the optical fiber, comprising:
a first moving mechanism for controllably moving the first electrode in a first direction identical to an axial direction
of the first and the second electrode; a second moving mechanism for controllably moving the first electrode in a second direction
not identical to both the axial direction of the optical fiber and the first direction in synchronism with the first moving
mechanism; a third moving mechanism for controllably moving the second electrode in the first direction; and a fourth moving
mechanism for controllably moving the second electrode in the second direction in synchronism with the third moving mechanism,

wherein the second moving mechanism and the fourth moving mechanism are configured to bringing the first electrode and the
second electrode away from each other in the second direction by respectively moving the first electrode and the second electrode
independently of each other.

US Pat. No. 9,051,662

SINGLE CRYSTAL, PRODUCTION PROCESS OF SAME, OPTICAL ISOLATOR, AND OPTICAL PROCESSOR USING SAME

FUJIKURA LTD., Tokyo (JP...

1. A single crystal which is composed of a terbium aluminum garnet single crystal and in which a portion of the aluminum is
replaced with lutetium (Lu).

US Pat. No. 9,312,654

OPTICAL AMPLIFICATION COMPONENT AND FIBER LASER DEVICE

FUJIKURA LTD., Tokyo (JP...

1. An optical amplification component comprising:
a heat dissipation plate; and
an amplification optical fiber arranged on the heat dissipation plate, the amplification optical fiber including
a first section extending from a reference position between a first end and a second end of the amplification optical fiber
up to a position at which a first fiber portion extending from the reference position toward the first end and a second fiber
portion extending from the reference position toward the second end are aligned in one direction, and

a second section where the first fiber portion and the second fiber portion are wound in a spiral outside the first section
along each other,

wherein the circumference of a first end part of the amplification optical fiber and the circumference of a second end part
of the amplification optical fiber are separated from side surfaces of the first fiber portion and the second fiber portion
wound in a spiral, and

wherein the heat dissipation plate has a structure in which a thermal resistance in a first heat dissipation area in which
each of the first end part and the second end part of the amplification optical fiber is arranged is smaller than the thermal
resistance in a second heat dissipation area in which the first section is arranged such that the amount of heat dissipation
in the first heat dissipation area is larger than the amount of heat dissipation in the second heat dissipation area.

US Pat. No. 9,252,556

AMPLIFYING OPTICAL FIBER AND OPTICAL AMPLIFIER

FUJIKURA LTD., Tokyo (JP...

1. An amplifying optical fiber comprising:
a plurality of cores to which an active element is doped;
a first cladding enclosing the plurality of cores with no gap; and
a second cladding enclosing the first cladding, wherein:
the plurality of cores is disposed around a center axis of the first cladding;
the first cladding has a two-layer structure formed of a solid inner layer passed through the center axis of the first cladding
and an outer layer enclosing the inner layer and the plurality of cores with no gap;

a refractive index of the core is provided higher than refractive indexes of the inner layer and the outer layer;
the refractive indexes of the inner layer and the outer layer are provided higher than a refractive index of the second cladding;
and

the refractive index of the inner layer is provided lower than the refractive index of the outer layer.

US Pat. No. 9,252,872

CROSSTALK MEASURING METHOD AND CROSSTALK MEASURING DEVICE

FUJIKURA LTD., Tokyo (JP...

1. A crosstalk measuring method comprising:
an acquiring step of acquiring data which indicates a distance distribution of an intensity of light which enters one end
of a core of a multicore fiber and returns to the one end, and data which indicates a distance distribution of an intensity
of light which enters other end of the core and returns to the other end; and

a waveform processing step of generating a waveform which includes as a main component a component produced by crosstalk as
a factor, using an inverted intensity distribution waveform obtained by symmetrically inverting at a center position of a
distance one of a first intensity distribution waveform indicated by the data which indicates the distance distribution of
the intensity of the light returning to the one end and a second intensity distribution waveform indicated by the data which
indicates the distance distribution of the intensity of the light returning to the other end and the other one of the first
intensity distribution waveform and the second intensity distribution waveform.

US Pat. No. 9,655,241

PRINTED WIRING BOARD AND CONNECTOR CONNECTING THE WIRING BOARD

FUJIKURA LTD., Tokyo (JP...

1. A printed wiring board comprising:
a base substrate;
a plurality of pads for electrical connection that are disposed at one surface side of the base substrate and at a connection
end portion to be connected with a connector, the plurality of pads forming front and rear two arrays when viewed in a direction
of connection with the connector;

first wirings that are provided at the other surface side of the base substrate and connected with pads of the front array
of the plurality of pads via vias penetrating the base substrate; and

second wirings that are provided at the one surface side of the base substrate and connected with pads of the rear array of
the plurality of pads, wherein

the first wirings are provided so as to pass through respective positions at the other surface side of the base substrate
corresponding to the pads of the front array and the pads of the rear array,

the first wirings have first expanded-width parts provided at positions on the other surface side of the base substrate corresponding
to the pads of the front array and second expanded-width parts provided at positions on the other surface side of the base
substrate corresponding to the pads of the rear array,

the first expanded-width parts have shapes corresponding to shapes of the pads of the front array, and
the second expanded-width parts have shapes corresponding to shapes of the pads of the rear array.

US Pat. No. 9,362,026

OXIDE SUPERCONDUCTOR WIRE, CONNECTION STRUCTURE THEREOF, AND SUPERCONDUCTOR EQUIPMENT

FUJIKURA LTD., Tokyo (JP...

1. An oxide superconductor wire comprising:
a superconductor laminate comprising a tape-shaped substrate, an interlayer, an oxide superconductor layer, and a protection
layer which are formed on the substrate;

a metal stabilization layer covering the periphery of the superconductor laminate;
a first electrically conductive joint material arranged between the superconductor laminate and the metal stabilization layer;
and

a sealing member formed from a metal foil, connected to a terminal of the superconductor laminate, and extending in the longitudinal
direction of the superconductor laminate,

wherein the metal stabilization layer comprises an extension part formed so as to cover the periphery of the sealing member,
and

wherein the first electrically conductive joint material comprises an extension part arranged between the extension part of
the metal stabilization layer and the sealing member and formed so as to cover the periphery of the sealing member.

US Pat. No. 9,268,090

FUSION SPLICING APPARATUS AND METHOD THEREOF

FUJIKURA LTD., Tokyo (JP...

1. A fusion splicing apparatus comprising:
a pair of discharge electrodes configured to discharge-heat end faces of a pair of optical fibers for fusion splicing the
end faces to each other;

holding units configured to hold the pair of optical fibers;
V-groove blocks each having a V-groove, the V-groove configured to receive, position, and fix a part of the optical fiber
on an end-face side of the holding unit;

V-groove-block moving mechanisms configured to move the V-groove blocks to shift an axial center of the pair of optical fibers
from a straight line joining the pair of discharge electrodes to each other; and

holding-unit moving mechanisms moving the holding units according to the movements of the V-groove-block moving mechanisms
so that the axial center of the pair of optical fibers is shifted from the straight line joining the pair of discharge electrodes
to each other while the pair of optical fibers is roughly in a straight line between the V-groove-block and the holding, wherein

the holding-unit moving mechanism includes:
a pair of first and second guide faces that cross the moving direction of the holding unit;
the first guide face being a tilt face tilted with respect to a plane that is orthogonal to the moving direction;
a first guide member that is positioned between the pair of guide faces, is in contact with the tilt face, and is moved along
the plane that is orthogonal to the moving direction;

a second guide member that is in contact with the second guide face opposing the tilt face and is moved along the plane that
is orthogonal to the moving direction; and

a drive unit that moves the guide members along the plane that is orthogonal to the moving direction.

US Pat. No. 9,136,663

FIBER-OPTIC SYSTEM AND METHOD FOR MANUFACTURING SAME

FUJIKURA LTD., Tokyo (JP...

1. A fiber-optic system comprising:
a double clad fiber for amplifying light, the double clad fiber having a core, a first clad and a second clad;
a single clad fiber for transmitting the light amplified by the double clad fiber, the single clad fiber having a core and
a first clad; and

a triple clad fiber inserted between the double clad fiber and the single clad fiber, the triple clad fiber including a core,
a first clad, a second clad and a third clad,

the triple clad fiber including a plurality of triple clad fiber elements whose first clads have different cross sectional
areas, respectively,

the plurality of triple clad fiber elements being joined so that a cross section of a first clad of each one of the plurality
of triple clad fiber elements except a triple clad fiber element farthest from the double clad fiber overlaps with cross sections
of both of a first clad and a second clad of another one of the plurality of triple clad fiber elements, the another one of
the plurality of triple clad fiber elements being joined to the each one of the plurality of the triple clad fiber elements,
on a side opposite to a side where the double clad fiber is joined to the triple clad fiber.

US Pat. No. 9,591,767

COMPONENT BUILT-IN BOARD AND METHOD OF MANUFACTURING THE SAME, AND COMPONENT BUILT-IN BOARD MOUNTING BODY

FUJIKURA LTD., Tokyo (JP...

1. A component built-in board comprising:
a plurality of printed wiring bases stacked therein and having a resin base, and a wiring pattern and a via formed on/in the
resin base; and

an electronic component built in the component built-in board, wherein
at least a portion of the plurality of printed wiring bases include a thermal wiring in the wiring pattern and include a thermal
via in the via,

at least one of the plurality of printed wiring bases has formed therein an opening where the electronic component is built,
and has formed therein a heat-conducting layer configured from a metallic member and closely attached to an opposite surface
of the electronic component on an opposite side to an electrode formation surface of the electronic component built in to
the opening,

the electronic component is fixed in the opening by an adhesive layer stacked on the heat-conducting layer, via a hole formed
in a region of the heat-conducting layer facing onto the opening, the adhesive layer contacting the opposite surface via the
hole of the heat-conducting layer, and

wherein the heat-conducting layer is connected to the thermal via and the thermal wiring.

US Pat. No. 9,425,579

OPTICAL FIBER COUPLER AND OPTICAL FIBER AMPLIFIER

FUJIKURA LTD., Tokyo (JP...

1. An optical fiber coupler comprising:
a first optical fiber having a core, an inner clad coating the core, and an outer clad coating the inner clad and having a
smaller refractive index than the inner clad, signal light being capable of propagating through the core and pumping light
being capable of propagating through the inner clad and the outer clad;

a second optical fiber having a core, the pumping light being capable of propagating through the core as multimode light;
and

a fusion-drawn portion formed by arranging the first optical fiber and the second optical fiber so that their longitudinal
directions are in the same direction and fusing the outer clad of the first optical fiber and the core of the second optical
fiber,

wherein, in a predetermined length along a longitudinal direction of the fusion-drawn portion, width of the first optical
fiber and width of the second optical fiber respectively become gradually smaller from one longitudinal end of the fusion-drawn
portion toward a center of the fusion-drawn portion, and

wherein the outer clad of the first optical fiber has a refractive index not smaller than that of the core of the second optical
fiber.

US Pat. No. 9,198,558

HARNESS FOR MEDICAL DEVICE AND METHOD FOR ASSEMBLING MEDICAL DEVICE

FUJIKURA LTD., Tokyo (JP...

1. A harness for a medical device, comprising:
cables which are to be inserted into a tubular member of the medical device;
a detector which is connected to ends of the cables; and
printed wiring boards which are connected to other ends of the cables, wherein
each of the printed wiring boards has wire attaching parts,
following Expressions (1) and (2) are satisfied,
W1
P1?L1  (2)

where W1 denotes a width of each of the printed wiring boards, and D1 denotes an inner diameter of the tubular member, P1 denotes a pitch between the wire attaching parts, and L1 denotes a length of a portion to which at least one of the cables is connected in each of the printed wiring boards.

US Pat. No. 9,335,472

PLANAR OPTICAL WAVEGUIDE DEVICE AND DP-QPSK MODULATOR

FUJIKURA LTD., Tokyo (JP...

1. A planar optical waveguide device, comprising:
two input portions that are waveguides that have the same width, are parallel to each other, and have rectangular cross-sections;
a wide portion that is a linear waveguide and is connected after the two input portions;
a tapered portion that is connected after the wide portion and that is a multi-mode waveguide which has a tapered shape having
a width decreasing gradually and through which at least TE1 propagates; and

an output portion that is connected after the tapered portion and that is a multi-mode waveguide which has a rectangular cross-section
and through which at least TE1 propagates,

wherein the planar optical waveguide device forms a high-order mode conversion combining element that outputs the TE0, which
is input to the two input portions, as the TE1 from the output portion, and

assuming that a distance between the two input portions in a width direction of the two input portions is gap, a width of
each of the two input portions is Wa, and a waveguide width of the wide portion is Wb, a relationship of Wb>Wa×2+gap is satisfied,
and a center of the two input portions in the width direction matches a center of the wide portion in the width direction.

US Pat. No. 9,271,429

COOLING DEVICE, COOLING SYSTEM, AND AUXILIARY COOLING DEVICE FOR DATACENTER

FUJIKURA LTD., Tokyo (JP...

1. A cooling system for a data center, in which a plurality of servers having exothermic electronic components is installed
in a housing, comprising:
a circuit, in which a first cooling medium is circulated therethrough;
a main cooling device, which is connected with the electronic components through the circuit, and to which the first cooling
medium heated by drawing heat from the electronic components is returned; and

an auxiliary cooling device, which is arranged on a return pipe of the circuit between the main cooling device and the electronic
components to assist the main cooling device in cooling of the first cooling medium,

wherein the main cooling device comprises a compressor which compresses a second cooling medium by applying a pressure to
the second cooling medium, a condenser which transports heat of the compressed second cooling medium to outside, thereby condensing
the second cooling medium, an expansion valve which adiabatically expands the condensed second cooling medium, and an evaporator
which removes the heat from the first cooling medium by the second cooling medium that is expanded and thereby having a temperature
which is lowered;

wherein the auxiliary cooling device is configured to cool the first cooling medium flowing back to the main cooling device
by radiating the heat of the first cooling medium to the atmosphere, and comprises a tank which stores the first cooling medium
therein, and a first plurality of heat pipes which are adapted to cool or freeze the first cooling medium by radiating the
heat of the first cooling medium to the atmosphere;

wherein the tank comprises a plurality of flow channels formed as grooves between ribs on a bottom of the tank, and the first
cooling medium flows unidirectionally through the flow channels;

wherein the plurality of heat pipes comprises thermosiphons, in which a volatile and condensable working fluid is encapsulated
in an air-tight fashion;

wherein first end portions of the thermosiphons are immersed into the first cooling medium in the flow channels of the tank
to serve as an evaporation portion, and second end portions of the thermosiphons are exposed to the atmosphere to serve as
a condensing portion; and

wherein the first plurality of heat pipes are arranged such that the volatile and condensable working fluid drops only gravitationally
to unidirectionally restrict direction of transport of the heat.

US Pat. No. 9,146,353

OPTICAL FIBER FUSION SPLICER

FUJIKURA LTD., Tokyo (JP...

1. An optical fiber fusion splicer comprising:
an apparatus body having a heat fusion portion that fusion-splices optical fibers;
a windshield cover that is formed so as to be openable and closable with respect to the apparatus body by one or more cover
members and that covers the heat fusion portion in a closed state;

clamp mounts or a pair of holder mounting portions that are provided on both sides of the heat fusion portion of the apparatus
body;

a coating clamp that holds a coated portion of the optical fiber between a lower clamp member fixed on the clamp mount and
an upper clamp member pivotally attached to the lower clamp member so as to be openable and closable with respect to the lower
clamp member, or a fiber holder that holds a coated portion of the optical fiber between a base plate and a cover plate pivotally
attached to the base plate so as to be openable and closable with respect to the base plate, the fiber holder being detachably
placed on the holder mounting portion;

fiber mounting detectors that are respectively provided in both of the clamp mounts or both of the fiber mounting portions;
and

a windshield open and close power source that is configured to open and close the windshield cover, wherein
the fiber mounting detectors are configured to detect that the optical fiber has been mounted by detecting either one of that
the upper clamp member of the coating clamp has been closed with respect to the lower clamp member, that the fiber holder
has been mounted on the holder mounting portion, that the optical fiber has been placed on the lower clamp member of the coating
clamp, and that the optical fiber held and fixed to the fiber holder has been disposed at a predetermined position on the
holder mounting portion as optical fiber mounting, and

when both of the fiber mounting detectors detect that the optical fibers have been mounted, an operation to close the windshield
cover by driving the windshield cover with the windshield open and close power source is performed in a state where the windshield
cover is open, and an operation to open the windshield cover by driving the windshield cover with the windshield open and
close power source is performed after the connection portion inspection is completed.

US Pat. No. 9,124,082

POWER CABLE TERMINATION FOR AERIAL CONNECTION AND PROCESS FOR PRODUCING POWER CABLE TERMINATION FOR AERIAL CONNECTION

VISCAS CORPORATION, Toky...

1. A power cable termination for aerial connection to house an end of a power cable and a conductor extension rod connected
to an end of a conductor of the cable in a bushing, comprising:
an insulating filler to fill the bushing, wherein
the insulating filler is comprised of a gel cured in the bushing, and
the gel is a cured product of any one of:
(1) a mixture of a silicone oil having no polymerization reactivity and a liquid-form raw material of a silicone rubber, wherein
a mass ratio of the silicone oil to the raw material of silicone rubber ranges from 9:1 to 20:1;

(2) a mixture of a silicone oil having no polymerization reactivity and a liquid-form raw material of a silicone gel, wherein
a mass ratio of the silicone oil to the raw material of the silicone gel ranges from 2:8 to 7:3; and

(3) a mixture of silicone oil having no polymerization reactivity, a liquid-form raw material of a silicone rubber, and a
liquid-form raw material of a silicone gel

wherein at least one of
a mass ratio of the silicone oil to the raw material of silicone rubber ranges from 9:1 to 20:1 and
a mass ratio of the silicone oil to the raw material of the silicone gel ranges from 2:8 to 7:3.

US Pat. No. 9,435,943

OPTICAL DEVICE

FUJIKURA LTD., Tokyo (JP...

1. An optical device comprising:
a plurality of cores each including an inner core and an outer core surrounding an outer circumferential surface of the inner
core, the outer core having a refractive index lower than a refractive index of the inner core; and

a cladding surrounding the outer circumferential surface of the core and having a refractive index lower than the refractive
index of the outer core, wherein:

the optical device includes a tapered portion in which the each core is tapered in diameter from a first end to a second end
of the core in a longitudinal direction and a pitch between the cores adjacent to each other is decreased;

when light propagates through the core tapered in diameter, a bending loss of an LP02 mode light beam and a bending loss of an LP21 light beam at a wavelength of 1.53 ?m are 1.0 dB/m or greater at a radius of 140 mm, and a bending loss of an LP11 mode light beam at a wavelength of 1.625 ?m is 0.5 dB/100 turns or less at a radius of 30 mm; and

0.5377×r2?7.7?V2/V1?0.5377×r2?5.7

3?r2/r1?5
are satisfied,
where a radius of the inner core before tapered in diameter is defined as r1, a radius of the outer core before tapered in diameter is defined as r2, a refractive index volume formed of a product of a cross sectional area of the inner core and a relative refractive index
difference of the inner core to the cladding before tapered in diameter is defined as V1, and a refractive index volume formed of a product of a cross sectional area of the outer core and a relative refractive
index difference of the outer core to the cladding before tapered in diameter is defined as V2.

US Pat. No. 9,265,147

MULTI-LAYER WIRING BOARD

FUJIKURA LTD., Tokyo (JP...

1. A multi-layer wiring board, comprising: a first resin base; a wiring pattern provided on the first resin base and including
a land; an adhesive layer on which the first resin base is stacked; a second resin base disposed on the adhesive layer opposite
to the first resin base; and a via formed in the adhesive layer and having an end connected to the land, at least a portion
of a side surface of the land contacting the via, wherein only a part of the side surface of the land contacts the via and
only a part of a bottom surface of the land contacts the via, and wherein the land is embedded in the via and a diameter of
the land is smaller than a diameter of the via.

US Pat. No. 9,225,059

ANTENNA UNIT AND PLANAR WIRELESS DEVICE

FUJIKURA LTD., Tokyo (JP...

1. An antenna unit, comprising:
a grounded planar antenna including a radiating element and a ground plate; and
a thin-film battery including a positive-electrode current collector opposing a negative-electrode current collector which
is formed by the ground plate,

wherein the ground plate and the positive-electrode current collector are overlapped, and
wherein the radiating element and the positive-electrode current collector are not overlapped.

US Pat. No. 9,234,792

LIGHT INTENSITY MONITOR CAPABLE OF DETECTING LIGHT INTENSITY AND FIBER BREAKING

FUJIKURA LTD., Tokyo (JP...

1. A light intensity monitoring circuit comprising:
a delivery fiber constituted by a double cladding fiber including (i) a core, (ii) a first cladding that encloses the core
and (iii) a second cladding that encloses the first cladding;

reflecting means for reflecting a part of laser light that propagates in the core of the delivery fiber, thereby coupling
the part of the laser light with a backward-propagating cladding mode that propagates in the first cladding in a backward
direction, the reflecting means being provided on an output end side of the delivery fiber; and

detecting means for detecting intensity of backward-propagating light in a cladding mode which light is the part of the laser
light coupled by the reflecting means with the backward-propagating cladding mode, the detecting means being provided on an
input end side of the delivery fiber;

wherein the detecting means includes:
a part, of the delivery fiber, which is near the input end of the delivery fiber and in which the second cladding has been
removed;

a detection fiber;
a high-refractive-index medium for coupling, with the detection fiber, light leaked from the part of the delivery fiber by
surrounding the part of the delivery fiber and an end portion of the detection fiber, the high-refractive-index medium having
a higher refractive index than the first cladding of the delivery fiber; and

a light detector for receiving the light coupled with the detection fiber.

US Pat. No. 9,229,157

SOLD PHOTONIC BAND GAP FIBER, FIBER MODULE USING SOLD PHOTONIC BAND GAP FIBER, FIBER AMPLIFIER, AND FIBER LASER

FUJIKURA LTD., Tokyo (JP...

1. A solid photonic band gap fiber comprising:
a core area located at a central portion of a cross-section with respect to a longitudinal direction of the fiber, the core
area being formed of a solid substance having a low refractive index;

cladding areas having base portions formed of a solid substance having a low refractive index, the cladding areas surrounding
the core area; and

a plurality of fine high refractive index scatterers provided in the cladding areas, and disposed in a dispersed manner so
as to surround the core area, the fine high refractive index scatterers being formed of a solid substance having a high refractive
index,

wherein in a state that the solid photonic band gap fiber is held at a predetermined bending radius, propagation in a high-order
mode is suppressed by using a difference in a bending loss between a fundamental mode and the high-order mode, and only the
fundamental mode is substantially propagated, the fundamental mode and the high-order mode being caused by bending,

the high refractive index scatterers are periodically disposed in a triangular grid shape in the cladding areas surrounding
the core area,

at least four or more layers of the high refractive index scatterers in the periodic structure are provided in a radius direction
of the fiber,

when the high refractive index scatterers are assumed to be periodically disposed in a triangular grid shape toward a direction
other than the radius direction from a central location of a transverse cross-section of the fiber, the core area has an area
that corresponds to an area in which two or more layers of the high refractive index scatterers are removed from the central
location of the transverse cross-section of the fiber,

a triangular grid-shaped periodic gap between the high refractive index scatterers is in a range of 10 ?m to 16 ?m, and a
relative refractive index difference between the high refractive index scatterers and a parent material of the cladding areas
is in a range of 1.3% to 3.0%, and

a predetermined bending radius is in a range of 90 mm to 200 mm, and an effective core cross-sectional area is 450 ?m2 or more.

US Pat. No. 9,096,464

METHOD AND APPARATUS FOR MANUFACTURING OPTICAL FIBER

FUJIKURA LTD., Tokyo (JP...

1. An optical fiber manufacturing method comprising:
forming a bare optical fiber by drawing an optical fiber preform;
forming an intermediate optical fiber by providing a coating layer on an outer periphery of the bare optical fiber, the coating
layer being formed of resin, the coating layer including a first layer disposed in contact with the bare optical fiber and
a second layer disposed so as to overlap the first layer, the second layer having a higher Young's modulus of resin than the
first layer;

performing primary curing of the coating layer which forms the intermediate optical fiber;
pressing an outer periphery of the intermediate optical fiber;
performing secondary curing of the pressed coating layer of the intermediate optical fiber by emitting ultraviolet rays to
the pressed coating layer, thereby forming an optical fiber; and

winding the optical fiber after completing the secondary curing.

US Pat. No. 9,335,491

CONNECTORED CABLE AND METHOD FOR MANUFACTURING CONNECTORED CABLE

FUJIKURA LTD., Tokyo (JP...

1. A connectored cable comprising:
a cable having an optical fiber and a signal line; and
a connector that accommodates a substrate, the substrate including a through hole for connecting an end portion of the signal
line by through-hole connection, the end portion of the signal line being connected to the substrate by through-hole connection
by being inserted into the through hole from a first side and being soldered from a second side opposite the first side,

in a case that a direction in which the cable extends out from the connector is referred to as a front-rear direction, inside
the connector, a bent portion is formed by the optical fiber being bent into a U shape by changing the orientation of the
optical fiber in the front-rear direction, and the bent portion is located above a coating of the signal line connected to
the substrate by through-hole connection.

US Pat. No. 9,221,711

PROCESS FOR PRODUCING OPTICAL FIBER AND PROCESSING APPARATUS FOR OPTICAL FIBER WORK USED FOR THE SAME

FUJIKURA LTD., Tokyo (JP...

1. A process for producing an optical fiber comprising
a processing process where an optical fiber work made of a glass is held by a processing apparatus for an optical fiber work
to be heated and processed,

wherein in the processing process, vibration caused by crack or breakage of the optical fiber work in the heated state or
vibration caused by crack or breakage of a glass body which is a portion of the processing apparatus for an optical fiber
work and is in the state where the glass body portion is heated due to the heating of the optical fiber work is detected by
using an acoustic emission sensor.

US Pat. No. 9,325,142

OPTICAL FIBER AND FIBER LASER APPARATUS USING SAME

FUJIKURA LTD., Tokyo (JP...

1. An optical fiber configured to propagate a light beam at a predetermined wavelength at least in an LP01 mode and an LP02
mode, wherein
a dopant that changes a Young's modulus is doped to at least a part of a waveguide region in a cladding through which the
light beam at the predetermined wavelength is propagated and to a region in a core in which an intensity of the light beam
in the LP01 mode is greater than an intensity of the light beam in the LP02 mode, and

at least a part of a Young's modulus in the waveguide region in the cladding is smaller than a Young's modulus in the region
in the core in which the intensity of the light beam in the LP01 mode is greater than the intensity of the light beam in the
LP02 mode.

US Pat. No. 9,203,205

FIBER LASER DEVICE

FUJIKURA LTD., Tokyo (JP...

1. A fiber laser device comprising:
a pumping light source configured to emit pumping light;
an amplification optical fiber configured to amplify signal light by the pumping light and emit the signal light;
a first FBG provided on one side of the amplification optical fiber and configured to reflect the signal light;
a second FBG provided on the other side of the amplification optical fiber and configured to reflect the signal light at a
reflectance lower than the first FBG; and

a detecting unit configured to detect, among the light passed through the first FBG from the amplification optical fiber side,
light in a specific wavelength range with priority to light at other wavelengths,

wherein the specific wavelength range is a wavelength range between a wavelength 15 nm below and above a maximum reflection
wavelength range, in which a reflectance of the first FBG is at the maximum.

US Pat. No. 9,400,351

MULTI-CORE FIBER

FUJIKURA LTD., Tokyo (JP...

1. A multi-core fiber comprising:
an even number of cores, wherein said even number is at least ten; and
a cladding surrounding the core, wherein
in the even number of cores, a half of the cores are disposed in a manner that centers are located on apexes of a regular
polygon whose center is at an origin point in the cladding,

in the even number of cores, other cores other than the half of the cores are disposed in a manner that centers are located
on perpendicular bisectors of edges of the regular polygon on an inner side of the regular polygon, wherein no core is disposed
at the origin point in the cladding, and

an expression below is satisfied where a number of the even number of cores is defined as n and a size of an acute angle formed
of a line connecting a center of a core on which attention is focused in the half of the cores to a center of a core in the
other cores adjacent to the core on which attention is focused and a line connecting the center of the core on which attention
is focused to the origin point is defined as ?, wherein the n is a number other than 12 and the ? is an angle other than 30°


US Pat. No. 9,389,386

MANUFACTURING METHOD OF OPTICAL FIBER RIBBON, MANUFACTURING DEVICE FOR OPTICAL FIBER RIBBON IMPLEMENTING SAID MANUFACTURING METHOD, AND OPTICAL FIBER RIBBON MANUFACTURED WITH SAID MANUFACTURING METHOD

FUJIKURA LTD., Tokyo (JP...

1. A manufacturing method for an optical fiber ribbon, in which: a plurality of optical fiber core cables are arranged in
parallel and the neighboring optical fiber core cables are coupled with each other at certain points with given intervals
therebetween in a longitudinal direction to form a subunit that is a unit to be divided; and the optical fiber core cables
positioned at side edges of the neighboring subunits are coupled with each other at certain points with given intervals therebetween
in the longitudinal direction, comprises:
a resin applying step for sending out the plurality of the optical fiber core cables in a parallel manner with intervals provided
therebetween, in the lateral direction of the optical fiber core cables, applying an uncured resin to the plurality of the
optical fiber core cables, moving a plurality of interrupt members which are included in an intermittent resin-coating device
and arranged corresponding to positions between each of the optical fiber core cables to interrupt the uncured resin, and
periodically changing positions at which the uncured resin is interrupted and positions at which the uncured resin is ejected
without interruption by the interrupt members; and

a resin curing step for irradiating positions, at which the plurality of the optical fiber core cables are arranged in parallel,
concentrated and in contact with each other, with resin curing energy required for the uncured resin coated on the optical
fiber core cables to cure, thereby forming coupled portions at which the optical fiber core cables are coupled to each other,

wherein first coupled portions between the subunits and second coupled portions within each subunit adjacent thereto do not
overlap in the width direction of the optical fiber ribbon, each interval between the adjacent first coupled portions being
longer than each interval between the adjacent second coupled portions,

wherein each of the first coupled portions overlaps with at least one of the other first coupled portions in the width direction
of the optical fiber ribbon, each of the second coupled portions does not overlap with the other coupled portions within the
same subunit in the width direction of the optical fiber ribbon and overlaps with one of the coupled portions within the other
subunit in the width direction of the optical fiber ribbon, and

wherein a moving period or phase of the interrupt members is changed for adjacent optical fiber core cables.

US Pat. No. 9,337,605

OPTICAL AMPLIFICATION COMPONENT AND FIBER LASER DEVICE

FUJIKURA LTD., Tokyo (JP...

1. An optical amplification component comprising:
a heat dissipation plate; and
an amplification optical fiber arranged on the heat dissipation plate,
wherein the amplification optical fiber comprises a first fiber portion extending from a reference position between a first
end and a second end of the amplification optical fiber toward the first end and a second fiber portion extending from the
reference position toward the second end,

wherein the amplification optical fiber comprises a wound portion in which both of the first fiber portion and the second
fiber portion are curved in a spiral around the reference position so as to be along each other as well as not to overlap
with each other, and the distance between the first fiber portion and the second fiber portion increases toward the first
and second ends thereof in the wound portion.

US Pat. No. 9,088,128

LASER MODULE AND METHOD FOR MANUFACTURING SAME

FUJIKURA LTD., Tokyo (JP...

1. A laser module comprising:
a bottom plate of a box;
a frame member of the box including a through hole that communicates an internal space of the box with an external space,
the frame member being fixed to the bottom plate;

a pipe member including a hollow portion communicating with the through hole, the pipe member being joined to an outer side
surface of the frame member;

an optical fiber held on the hollow portion of the pipe member; and
a laser element accommodated in the internal space of the box, an optical axis of the laser element being aligned with an
optical axis of the optical fiber,

wherein the hollow portion of the pipe member extending in a thickness direction of the pipe member, the thickness direction
extending along an axial direction of the pipe member, and the pipe member includes a bottom face extending through entire
thickness of the pipe member, and

wherein when the bottom plate is placed on a plane, an entirety of the bottom face of the pipe member is a portion of the
pipe member positioned on a same face as a portion of the bottom plate contacting the plane.

US Pat. No. 9,056,434

METHOD FOR EXTRUSION-MOLDING LOOSE TUBE AND APPARATUS THEREFOR, AND LOOSE TUBE

FUJIKURA LTD., Tokyo (JP...

1. A method for extrusion-molding a loose tube using an extrusion-molding apparatus that includes
an extrusion head that includes a tip and a die concentrically arranged within the extrusion head and extrudes a tube between
the tip and the die, and

a needle that feeds at least one optical fiber and filler to be filled around the optical fiber into the tube being extrusion-molded,
the method comprising:
passing the optical fiber through a bundling hole to bundle the optical fiber at a center of the tube, the bundling hole being
formed at a center of a bundling member provided within the needle and having an inner diameter smaller than an inner diameter
of the tube; and

passing the filler through a flow path to fill the filler around the optical fiber, the flow path being provided between the
bundling hole and an inner circumferential surface of the needle, wherein

a guide member is provided upstream of the bundling member along a feeding direction of the filler in the extrusion-molding
apparatus, a guide hole being formed at a center of the guide member, being larger than the bundling hole, and having an inner
diameter smaller than a length twice as a distance from the center of the bundling member to the flow path, and

the optical fiber is introduced into the bundling hole with being guided by the guide hole.

US Pat. No. 9,397,465

FIBER LASER DEVICE

FUJIKURA LTD., Tokyo (JP...

1. A fiber laser device comprising:
a seed laser light source configured to emit seed laser light;
a pumping light source configured to emit pumping light;
an amplification optical fiber configured to receive the seed laser light and the pumping light, amplify the seed laser light,
and output laser light, the amplification optical fiber being doped with a rare-earth element to be pumped by the pumping
light;

an output unit configured to emit the laser light, the laser light being emitted from the amplification optical fiber;
a control unit configured to control at least the seed laser light source and the pumping light source; and
an instruction unit configured to input an output instruction and an output suspension instruction to the control unit, the
output instruction being for causing the output unit to emit the laser light, the output suspension instruction being for
causing the output unit to stop emitting the laser light, wherein

the seed laser light source and the pumping light source are put into an output state after a first fixed period of time elapses
from a time when the output instruction is input to the control unit, and the output state of the seed laser light source
and the pumping light source is kept for the first fixed period of time after the output suspension instruction is input to
the control unit, and is ended after the first fixed period of time elapses from a time when the output suspension instruction
is input to the control unit, the first fixed period of time being set beforehand,

when a period from the time when the output suspension instruction is input to the control unit to a time when the next output
instruction is input to the control unit is shorter than the first fixed period of time, the seed laser light source and the
pumping light source are in a pre-pumped state during a period from the end of the output state to the next output state,

when the period from the time when the output suspension instruction is input to the control unit to the time when the next
output instruction is input to the control unit is longer than the first fixed period of time, the seed laser light source
and the pumping light source are in a suspended state during a period from the end of the output state to the time when the
next output instruction is input to the control unit, and are in the pre-pumped state during a period from the time when the
output instruction is input to the control unit to the next output state,

in the pre-pumped state, the seed laser light is not incident on the amplification optical fiber, and the pumping light with
a predetermined intensity is incident on the amplification optical fiber,

in the output state, the seed laser light is incident on the amplification optical fiber to cause the output unit to emit
the laser light, and the pumping light is incident on the amplification optical fiber, and

the first fixed period of time, in the pre-pumped state, is shorter than a period from a time when the pumping light with
the predetermined intensity is incident on the amplification optical fiber to a time when a gain of a resonator of the fiber
laser device becomes positive.

US Pat. No. 9,274,281

OPTICAL-FIBER-SPLICED PORTION REINFORCING HEATING DEVICE

FUJIKURA LTD., Tokyo (JP...

1. An optical-fiber-spliced portion reinforcing heating device comprising:
a pair of clamps that respectively grasp one portion and the other portion of a coated portion of an optical fiber, the optical
fiber including a fusion-spliced portion, the fusion-spliced portion being coated with a sleeve, the coated portion being
exposed from the sleeve;

at least two or more heaters that are arranged to face each other so as to sandwich the sleeve;
a first force-applying member that presses at least one of the paired clamps so as to apply a tension to the optical fiber;
and

a second force-applying member that applies a pressing force to at least one or more of the heaters via the sleeve in accordance
with control of a drive source, the heaters being arranged to face each other with the sleeve interposed therebetween, wherein

a pressing force that is to be applied to the sleeve by the second force-applying member is set to be greater than a tension
that is to be applied to the optical fiber by the first force-applying member,

the first force-applying member grasps one of the clamps while pressing one of the clamps in a state where movement of one
of the clamps in a front-back direction is restricted by the first force-applying member, thereafter, restriction of movement
is released,

therefore, in a state in which a tension is applied to the optical fiber, one of the clamps is configured so that a backward
movable range in a direction away from the heaters in a longitudinal direction of the optical fiber is ensured, a forward
movable range that allows movement to the heater side is ensured, and one of the clamps is thereby configured to move in a
direction in which a tension that is applied to the optical fiber as a result of pressing the sleeve by the heaters and by
the second force-applying member is diminished.

US Pat. No. 9,389,361

METHOD AND APPARATUS FOR MANUFACTURING OPTICAL FIBER

FUJIKURA LTD., Tokyo (JP...

1. A method for manufacturing an optical fiber comprising:
heating and melting a silica-based optical fiber preform in a drawing furnace;
drawing the melted preform into a linear shape from the drawing furnace at a speed of approximately 5 m/min to 100 m/min,
continuously cooling and solidifying the linear shape through cooling in an atmosphere to form a bare optical fiber;

coating the bare optical fiber with a resin to form an optical fiber; and
continuously taking up the optical fiber while applying a tensile force using a take-up machine,
wherein, when a surface temperature of the cooled and solidified bare optical fiber reached down to 100° C. or lower, a surface
of the bare optical fiber is reheated while applying a tensile force so as to remelt only a surface layer of the bare optical
fiber,

a time period from when the melted preform is drawn from the drawing furnace to when the reheating begins is set to 2 seconds
or more; and

the surface layer of the bare optical fiber that has been remelted is re-solidified, then, the bare optical fiber is coated
with a resin, and the tensile force is released afterward, thereby obtaining an optical fiber having a residual compressive
stress imparted to the surface layer in the bare optical fiber.

US Pat. No. 9,351,410

ELECTRONIC COMPONENT BUILT-IN MULTI-LAYER WIRING BOARD AND METHOD OF MANUFACTURING THE SAME

FUJIKURA LTD., Tokyo (JP...

1. An electronic component built-in multi-layer wiring board comprising:
a plurality of printed wiring boards collectively stacked therein by thermal compression bonding; and
a plurality of electronic components built in thereto,
wherein
the electronic components include a first electronic component and a second electronic component having a thickness which
is greater than that of the first electronic component,

the first electronic component is built in to an embedding-dedicated board set to a thickness which is 80% to 125% of the
thickness of the second electronic component, and the embedding-dedicated board and the second electronic component are then
mounted on the same one of the printed wiring boards and thereby built in to the electronic component built-in multi-layer
wiring board,

the plurality of printed wiring boards includes a top board, a bottom board and a middle board disposed between the top board
and the bottom board, the middle board including a first cavity and a second cavity, the first cavity and the second cavity
having the same height, the embedding-dedicated board being disposed in the first cavity and the second electronic component
being disposed in the second cavity, and

the embedding-dedicated board is formed by an identical material to that of the printed wiring boards.

US Pat. No. 9,250,384

MULTICORE FIBER

FUJIKURA LTD., Tokyo (JP...

1. A multicore fiber comprising a first multicore fiber member and a second multicore fiber member, one end face of the first
multicore fiber member being spliced to one end face of the second multicore fiber member, wherein
core end faces of multiple cores in the first multicore fiber member are spliced one-to-one to core end faces of multiple
cores in the second multicore fiber member, and

among the cores in the first multicore fiber member and the cores in the second multicore fiber member spliced one-to-one
at the core end faces, at least one core in the first multicore fiber member and one core in the second multicore fiber member
spliced thereto have different effective core areas from each other, and

the core having the larger effective core area has an open end face located opposite to the spliced core end face thereof,
the open end face receiving light such that the light propagates through the core having the larger effective core area to
enter the corresponding core, and

wherein a difference in the effective core area difference between a core in the first multicore fiber member and a core in
the second multicore fiber member is 45 ?m2 or smaller.

US Pat. No. 9,257,237

DYE-SENSITIZED SOLAR CELL MODULE AND MANUFACTURING METHOD FOR SAME

FUJIKURA LTD., Tokyo (JP...

1. A manufacturing method for a dye-sensitized solar cell module,
the method comprising:
a preparation step of preparing a pair of electrodes,
a partition forming portion fixing step of fixing partition forming portions containing a thermoplastic resin on at least
one electrode of the pair of electrodes by heating and melting the partition forming portions, and

a lamination step of laminating the pair of electrodes via the partition forming portions with an electrolyte disposed between
the pair of electrodes at a pressure of 50 Pa or more and less than 1013 hPa, and forming partitions that form a plurality
of cell spaces together with the pair of electrodes between the pair of electrodes, the partitions being formed by heating
and melting the partition forming portions and connecting the pair of electrodes, wherein,

one electrode of the pair of electrodes has a plurality of oxide semiconductor portions,
a dye loading step of loading a photosensitizing dye onto the oxide semiconductor portions is included between the preparation
step and the partition forming portion fixing step,

a superimposing step of superimposing the pair of electrodes on at least one of which the partition forming portions are fixed
is included between the partition forming portion fixing step and the lamination step,

the partition forming portion fixing step is performed before the superimposing step,
at least one electrode of the pair of electrodes is composed of at least two layers, the thickest layer being a metal substrate
having a thickness of 10 ?m or more and 40 ?m or less,

in the lamination step, the pair of electrodes are laminated so that a bending portion that bends so as to protrude towards
one of the cell space is formed in the electrode containing the metal substrate, the bending portion including the metal substrate,
and

in the lamination step, the pair of electrodes are laminated so that the oxide semiconductor portion and the bending portion
oppose one another in each of the cell spaces;

so that the electrolyte is accommodated in each of the cell spaces;
so that the partitions connect both the pair of electrodes; and
so that the plurality of cells, which are formed by the cell spaces, the partitions and the pair of electrodes, are connected
in parallel.

US Pat. No. 9,457,415

WATER REMOVING METHOD, OPTICAL FIBER SOLDERING METHOD, AND SEMICONDUCTOR LASER MODULE MANUFACTURING METHOD

FUJIKURA LTD., Tokyo (JP...

1. A moisture removing method for removing moisture contained in a dielectric film provided on a first end surface of an optical
fiber,
the moisture removing method comprising:
a heating step of causing near infrared light to enter the optical fiber through a second end surface disposed opposite to
the first end surface to heat the moisture in the dielectric film with use of the near infrared light to remove the moisture
in the dielectric film.

US Pat. No. 9,235,009

OPTICAL CONNECTOR AND METHOD OF PREVENTING PROTECTION TUBE FROM COMING OFF FROM OPTICAL CONNECTOR

FUJIKURA LTD., Tokyo (JP...

1. An optical connector assembled at an end of a bare optical fiber protected by a protection tube, comprising:
a cylindrical structure (i) which is provided on a back end side of a housing body of the optical connector which housing
body houses a ferrule, (ii) into which the bare optical fiber which extends from the ferrule is inserted, and (iii) which
has an outer circumferential surface to which the protection tube is fixed; and

a fixing member which is combined with the cylindrical structure so that the protection tube is sandwiched between the outer
circumferential surface of the cylindrical structure and an inner wall surface of the fixing member,

one of the outer circumferential surface of the cylindrical structure and the inner wall surface of the fixing member having
a protrusion section which applies pressure to the protection tube to deform the protection tube so that the protection tube
is fixed to the cylindrical structure, whereas the other of the outer circumferential surface of the cylindrical structure
and the inner wall surface of the fixing member having a stair part in a vicinity of a back side of the protrusion section,
the stair part having a back portion having only an inclined surface which inclines in a direction opposite to a direction
in which the protrusion section protrudes, and

the protection tube which is in contact with the stair part being bent in the direction opposite to the direction in which
the protrusion section protrudes so as to be stepped, so that resistance against pulling out of the protection tube is caused.

US Pat. No. 9,123,456

HIGH FREQUENCY CABLE, HIGH FREQUENCY COIL AND METHOD FOR MANUFACTURING HIGH FREQUENCY CABLE

FUJIKURA LTD., Tokyo (JP...

1. A high frequency cable, comprising:
a central conductor made from aluminum or an aluminum alloy;
a covering layer made from copper covering the central conductor, and having a fiber-like structure in a longitudinal direction;
and

an intermetallic compound layer formed between the central conductor and the covering layer and having greater volume resistivity
than the covering layer, wherein a cross-sectional area of the covering layer is 15% or less of an entire cross-sectional
area including the central conductor, the intermetallic compound layer and the covering layer, and

wherein a thickness of the intermetallic compound layer is between 10 nm and less than 1 ?m.

US Pat. No. 9,826,646

COMPONENT BUILT-IN BOARD AND METHOD OF MANUFACTURING THE SAME, AND MOUNTING BODY

FUJIKURA LTD., Tokyo (JP...

1. A component built-in board of multi-layer structure comprising a plurality of unit boards stacked therein and a plurality
of electronic components built in thereto in a stacking direction, wherein
the plurality of electronic components include a first electronic component, and
the plurality of unit boards include;
a first board having a first insulating layer comprising an opening in which the first electronic component is housed; and
an intermediate board adjacent to the first board and comprising a second insulating layer and a first adhesive layer provided
on at least a first side of the second insulating layer facing the first board, and

the intermediate board includes a first wiring layer on a first surface on the first side of the second insulating layer facing
the first board, and the first wiring layer overlapping a gap between an inner periphery of the opening and an outer periphery
of the first electronic component of the first board,

wherein the first wiring layer is entirely disposed within a region on the first surface defined by a boundary of the gap
in the stacking direction,

wherein the first wiring layer projects from the first surface toward the gap, and is covered entirely by the first adhesive
layer.

US Pat. No. 9,340,039

PRINTER, PRINTING METHOD, OPTICAL FIBER AND OPTICAL FIBER CABLE

FUJIKURA LTD., Tokyo (JP...

1. A printer for printing on an optical fiber comprising:
an ink tray storing an ink;
a drawing roll configured to draw the ink from the ink tray;
a printing roll, having a print pattern which is capable of filling the ink transferred from the drawing roll, configured
to transfer the ink filled in the print pattern to a surface of a running optical fiber; and

a doctor blade configured to press the ink into the print pattern and to scrape the excess ink deposited on a surface of the
printing roll,

wherein the drawing roll and the printing roll are arranged in non-contact with each other, and
a rotation speed of the drawing roll is slower than a rotation speed of the printing roll.

US Pat. No. 9,291,768

MULTICORE FIBER

FUJIKURA LTD., Tokyo (JP...

1. A multicore fiber comprising:
a plurality of cores; and
a cladding surrounding the plurality of cores,
wherein a pair of cores is arranged and disposed on a linear line passed through a center of the cladding, the pair of the
cores being adjacent to each other and having refractive indexes varied differently from the cladding to the cores, wherein

one of the pair of the cores is surrounded by an inner cladding layer having an average refractive index lower than an average
refractive index of the one core,

the inner cladding layer is surrounded by a trench layer having an average refractive index lower than the average refractive
index of the inner cladding layer, and

the inner cladding layer and the trench layer are not provided between the other of the pair of the cores and the cladding.

US Pat. No. 9,907,189

MULTI-LAYER WIRING BOARD AND METHOD OF MANUFACTURING THE SAME

FUJIKURA LTD., Tokyo (JP...

1. A multi-layer wiring board, comprising:
a plurality of printed wiring bases stacked, in a stacking direction, by an adhesive layer, the plurality of printed wiring
bases each having a wiring pattern formed on a resin base and a via formed in the resin base;

a plurality of multi-layer wiring portions disposed in a matrix of at least 2×2 or more; and
a movable portion configured from an elastic member, the movable portion is provided between the plurality of multi-layer
wiring portions to join the plurality of multi-layer wiring portions in a crisscross manner,

wherein each of the multi-layer wiring portions comprises a component built-in portion having an electronic component built
in internally thereto in the stacking direction, the electronic component being disposed in an opening provided to a first
resin base of the resin bases,

the multi-layer wiring board includes a recess recessed from one surface along the stacking direction and penetrating the
first resin base provided with the opening,

the elastic member of the movable portion fills the recess in the stacking direction.

US Pat. No. 9,263,847

LIGHT DELIVERY COMPONENT AND LASER SYSTEM EMPLOYING SAME

FUJIKURA LTD., Tokyo (JP...

1. A light delivery component comprising:
a delivery fiber configured to include a core and a clad; and
a heat radiating member,
wherein the delivery fiber is configured to include a first light emitting unit connected to a portion of the heat radiating
member and a second light emitting unit connected to another portion of the heat radiating member, and at least the second
light emitting unit is bent,

the first light emitting unit is installed closer to a light incidence end of the delivery fiber than the second light emitting
unit, and a bending radius of the first light emitting unit is set to be larger than that of the second light emitting unit,

the delivery fiber further includes a cover layer covering the clad, and
the clad is covered with the cover layer in at least a portion of the first light emitting unit and the second light emitting
unit.

US Pat. No. 9,477,035

OPTICAL DEVICE

FUJIKURA LTD., Tokyo (JP...

1. An optical device comprising:
multiple cores each including an inner core and an outer core surrounding an outer circumferential surface of the inner core
without any gap therebetween; and

cladding surrounding an outer circumferential surface of the cores without any gap therebetween and having a refractive index
lower than that of the outer core, wherein

each of the cores has a tapered portion that is tapered from one side toward the other side thereof in a longitudinal direction,
each of the inner cores includes a low-refractive-index portion, and a high-refractive-index portion surrounding an outer
circumferential surface of the low-refractive-index portion without any gap therebetween and having a refractive index higher
than that of the low-refractive-index portion, and

the outer core has a refractive index lower than that of the high-refractive-index portion,
wherein each of the cores has one end located on the one side thereof and an opposite end located on the other side thereof,
and

each of the cores has a larger diameter at the one end than a diameter at the opposite end,
wherein a first light in LP01 mode and a second light in higher-order mode higher than LP01 mode propagate substantially within
each of the inner cores at the one end, and

the first light and the second light propagate through each of the outer cores and corresponding one of the inner cores at
the opposite end,

wherein the low-refractive-index portion has a refractive index not larger than the refractive index of the outer core,
wherein the low-refractive-index portion has a refractive index not larger than the refractive index of the cladding,
wherein the low-refractive-index portion has a refractive index equal to the refractive index of the cladding, and
wherein when a radius of the inner core is represented by r1, a radius of an outer circumference of the outer core is represented by r2, a diameter of the low-refractive-index portion is represented by d, a relative refractive index difference of the inner
core from the cladding is represented by ?1, a relative refractive index difference of the outer core from the cladding is represented by ?2, and a diameter of the core before tapering when a diameter of the core after tapering is represented by 1 is represented
by R, the following expression is satisfied:

0.1284×V2?3
V1=??1(r12?(d/2)2)

V2=??2(r22?r12).

US Pat. No. 9,541,722

OPTICAL FIBER RIBBON AND OPTICAL FIBER CABLE

FUJIKURA LTD., Tokyo (JP...

1. An optical fiber ribbon comprising:
a plurality of optical fiber cores arranged in parallel spaced from each other; and
a tape forming member having coating portions covering each outer circumference of the optical fiber cores, spaced each other,
and a coupling portion, integrally formed with the coating portion, intermittently coupling the coating portions each covering
adjacent optical fiber cores,

wherein each thickness of the coupling portions is less than each thickness of the optical fiber cores including the coating
portions, and

each of the coating portions has an opening portion to expose a part of a surface of only a respective one of the optical
fiber cores, and at least a part of the coating portion is continuous in a longitudinal direction of the optical fiber cores.

US Pat. No. 9,300,037

ANTENNA DEVICE AND ANTENNA MOUNTING METHOD

FUJIKURA LTD., Tokyo (JP...

1. An antenna device, comprising:
an inverted F antenna including a radiating element and an internal ground and further including a short-circuit section for
short-circuiting the radiating element and the internal ground;

a coaxial cable whose internal conductor is connected with the radiating element and whose external conductor is connected
with the internal ground; and

an external ground capacitive-coupled with the external conductor of the coaxial cable by connecting, with the external ground,
a conductor wound around or attached onto a coverture of the coaxial cable.

US Pat. No. 9,435,968

OPTICAL REPEATER AND OPTICAL CONNECTOR DEVICE

FUJIKURA LTD., Tokyo (JP...

1. An optical repeater to be arranged between a substrate and an optical connector, the optical repeater comprising:
a body part including a plurality of optical paths to transmit an optical signal between the substrate and the optical connector,
a substrate-side end-face in which one end of each of the optical paths opposes the substrate, and a connector connecting
part to connect another end of each of the optical paths to the optical connector, the body part being configured from a material
with a greater coefficient of linear expansion than that of the substrate; and

a reinforcing member arranged so as to surround the optical paths in a side to the substrate-side end-face, the reinforcing
member being configured from a material with a smaller coefficient of linear expansion than that of the body part.

US Pat. No. 9,199,411

METHOD OF CONNECTING MULTI-CORE FIBERS

FUJIKURA LTD., Tokyo (JP...

1. A method of connecting a pair of multi-core fibers, the method comprising:
preparing a first multi-core fiber and a second multi-core fiber, the first multi-core fiber including a plurality of first
cores and a first common clad surrounding each of the plurality of the first cores, the second multi-core fiber including
a plurality of second cores and a second common clad surrounding each of the plurality of the second cores;

a butting step of butting end surfaces of the first and second multi-core fibers against each other by aligning central axes
of the first and second common clads of the multi-core fibers with each other to cause each core of the first multi-core fiber
and corresponding each core of the second multi-core fiber to face each other and butt end faces of the first common clad
and the second common clad against each other; and

a fusing step of fusing the first and second multi-core fibers to each other by carrying out discharge by a pair of discharge
electrodes disposed perpendicular to the central axes of the first and second clads, sandwiching a butted position of the
first and second multi-core fibers and facing each other,

wherein the fusing step further includes moving respective tips of the pair of discharge electrodes in a plane perpendicular
to the central axes of the first and second clads to cause an imaginary straight line connecting the tips of the discharge
electrodes to move in the plane perpendicular to the central axes, and wherein the fusing step fuses the first common clad
and the second common clad to each other.

US Pat. No. 9,423,571

OPTICAL CONNECTOR PROTECTING CAP, OPTICAL FIBER CABLE WITH CONNECTOR CAP, AND CAP REMOVAL TOOL

FUJIKURA LTD., Tokyo (JP...

1. A cap for protecting an optical connector, the cap comprising:
a cap body and a projecting pulling piece attached to the cap body, the cap body comprising:
a cylindrical body comprising a first end and a second end, opposite to the first end;
a front end wall disposed at the first end of the cylindrical body; and
a rear end opening formed at the second end of the cylindrical body, wherein the rear end opening is configured to receive
the optical connector therein;

wherein the projecting pulling piece is attached to and protrudes from the front end wall and is configured such that a drawing
out force applied to the projecting pulling piece pulls out the cap body from around the optical connector;

wherein the front end wall comprises a first portion, disposed along an axis line of the cap body, wherein the first portion
is a thin-walled portion, and a second portion, disposed around the first portion, wherein a thickness of the second portion
is greater than a thickness of the first portion, and a light transmission rate of the first portion is greater than a light
transmission rate of the second portion; and

wherein the projecting pulling piece protrudes from the second portion of the front end wall.

US Pat. No. 9,562,827

MEASURING METHOD OF LONGITUDINAL DISTRIBUTION OF BENDING LOSS OF OPTICAL FIBER, MEASURING METHOD OF LONGITUDINAL DISTRIBUTION OF ACTUAL BENDING LOSS VALUE OF OPTICAL FIBER, TEST METHOD OF OPTICAL LINE, MANUFACTURING METHOD OF OPTIC

FUJIKURA LTD., Tokyo (JP...

1. A measuring method of a longitudinal distribution of bending loss of an optical fiber, the method comprising:
conducting a bidirectional OTDR measurement of the optical fiber in a longitudinal direction of the optical fiber;
calculating an arithmetical mean value I(?, x) from two backscattering light intensities of two backscattering lights at a
position x obtained by the bidirectional OTDR measurement of the optical fiber;

obtaining a mode field diameter 2W(?, x) and a relative refractive index difference ?(x) between a core and a clad of the
optical fiber at the position x and a wavelength ?, using the arithmetical mean value I(?, x), formula (2), formula (3), and
formula (4):


and

obtaining a bending loss value at the position x based on the mode field diameter 2W(?, x) and the relative refractive index
difference ?(x) at the position x.

US Pat. No. 9,366,807

METHOD OF PRODUCING PREFORM FOR COUPLED MULTI-CORE FIBER, METHOD OF PRODUCING COUPLED MULTI-CORE FIBER, AND COUPLED MULTI-CORE FIBER

FUJIKURA LTD., Tokyo (JP...

1. A coupled multi-core fiber comprising:
a plurality of cores, wherein the respective cores have respective outer regions having a predetermined thickness from respective
periphery surfaces of the cores toward the respective centers of the cores, the outer regions being made of silica glass undoped
with germanium; and

a clad surrounding the cores and made of silica glass having a refractive index lower than a refractive index of the outer
regions of the cores,

wherein the periphery surfaces of adjacent cores among the cores contact each other, and
wherein all of the plurality of cores are aligned along a radial direction of the multi-core fiber.

US Pat. No. 9,355,788

DYE-SENSITIZED SOLAR CELL AND METHOD OF MANUFACTURING THE SAME

FUJIKURA LTD., Tokyo (JP...

7. A method of manufacturing a dye-sensitized solar cell comprising:
an inorganic sealing portion a forming step of forming an inorganic sealing portion including an inorganic material on a conductive
substrate;

a counter substrate preparing step of preparing a counter substrate;
an electrolyte disposing step of disposing an electrolyte on the conductive substrate or the counter substrate; and
a bonding step of forming a sealing portion between the conductive substrate and the counter substrate by bonding the conductive
substrate with the counter substrate,

wherein the inorganic sealing portion is formed so as to have a main body portion provided on the conductive substrate and
a protruding portion extending from the main body portion toward a side opposite to the conductive substrate in the inorganic
sealing portion forming step, and

the sealing portion is formed so as to have the inorganic sealing portion and a resin sealing portion fixed to the counter
substrate and including a resin material, and the resin sealing portion is formed so as to have an adhesive portion adhering
the main body portion to the counter substrate and adhered to a side surface along an extending direction of the protruding
portion in the bonding step.

US Pat. No. 9,234,946

SEMICONDUCTOR INTEGRATED CIRCUIT, MAGNETIC DETECTING DEVICE, ELECTRONIC COMPASS, AND AMMETER

FUJIKURA LTD., Tokyo (JP...

1. A semiconductor integrated circuit comprising:
a clock-signal generation circuit;
a signal processing circuit outputting an intensity signal corresponding to an intensity of an external magnetic field based
on a time interval between a first spike-shaped voltage waveform and a second spike-shaped voltage waveform in accordance
with a clock signal output from the clock-signal generation circuit, the second spike-shaped voltage waveform being detected
subsequent to the first spike-shaped voltage waveform, the second spike-shaped voltage waveform having an inverse sign to
that of the first spike voltage waveform;

and a clock-signal control circuit controlling and outputting a stop signal allowing intensity-signal output, which is output
from the signal processing circuit, to be stopped in at least a forward outage time and a backward outage time, the forward
outage time being previous to an apex point of a triangular wave and having 1 to 5% of a triangular wave period, the backward
outage time being subsequent to the apex point of the triangular wave and having 1 to 5% of a triangular wave period.

US Pat. No. 9,529,160

OPTICAL CONNECTOR

FUJIKURA LTD., Tokyo (JP...

1. An optical connector, comprising:
a coupling device
that is made of metal, and
that is to be coupled to a coupling mechanism of another optical connector that is to be coupled with the optical connector;
a ferrule;
a housing that is made of resin and that is accommodated by the coupling device while accommodating the ferrule in such a
manner that the ferrule can move rearward; and

a metal member that is affixed to the coupling device while holding the housing between the metal member and the coupling
device,

wherein a metal pin affixes between the coupling device and the metal member.

US Pat. No. 9,385,431

DIPOLE ANTENNA

FUJIKURA LTD., Tokyo (JP...

1. A dipole antenna comprising:
a first antenna element provided in a two-dimensional surface and having a linear shape;
and a second antenna element provided in the two-dimensional surface and having a spiral shape that circles around the first
antenna element by more than one round such that an inner circumference side part of the second antenna element at least partially
faces an outer circumference side part of the second antenna element while the first antenna element is not located between
the inner circumference side part and the outer circumference side part,

wherein a first feed point is provided on the first antenna element, and an outer conductor of a coaxial cable is connected
to the first feed point, wherein a second feed point is provided on the second antenna element, and an inner conductor of
the coaxial cable is connected to the second feed point, and

wherein the coaxial cable is provided on the first antenna element so as to extend along the first antenna element.

US Pat. No. 9,297,952

OPTICAL FIBER AND OPTICAL TRANSMISSION LINE

FUJIKURA LTD., Tokyo (JP...

1. An optical fiber comprising:
an inner core having an ?-power refractive index profile and a maximum refractive index of n1;
an outer core surrounding the inner core, the outer core having a refractive index of n1?; and
a cladding surrounding the outer core, the cladding having a refractive index of n2 (n1? a depth of a trench, defined by (n2?n1?), being set so that (i) a mode dispersion ??, defined by ??=(1/vg11)?(1/vg01), has
a positive sign, where vg01 indicates a group velocity of an LP01 mode and vg11 indicates a group velocity of an LP11 mode
and (ii) an inclination d??/d? of the mode dispersion ?? has a positive sign.

US Pat. No. 9,253,882

ELECTRONIC COMPONENT BUILT-IN MULTI-LAYER WIRING BOARD AND METHOD OF MANUFACTURING THE SAME

FUJIKURA LTD., Tokyo (JP...

1. An electronic component built-in multi-layer wiring board that comprises collectively stacked therein a plurality of first
printed wiring boards by thermal compression bonding, and that comprises an electronic component package built in thereto,
wherein
the electronic component package comprises a first electronic component built in thereto and a plurality of second printed
wiring boards stacked to have first electrodes on an outermost surface of the package, the first electronic component including
second electrodes, wherein a pitch of adjacent electrodes of the first electrodes is wider than a pitch of adjacent electrodes
of the second electrodes of the first electronic component and the pitch of the adjacent electrodes of the first electrodes
is matched to a wiring pitch of the first printed wiring boards, the first electrodes being connected to the second electrodes
in one-to-one correspondence,

the electronic component built-in multi-layer wiring board includes a second electronic component having a thickness which
is greater than that of the first electronic component, and

further comprising a third electronic component different from the first and second electronic components, the third electronic
component being surface-mounted immediately above or below the built-in location of the electronic component package with
electrodes of the third electronic component formed at a pitch matched to the wiring pitch of the first printed wiring board
being connected to the electrodes of the electronic component package by an electrically shortest path.

US Pat. No. 9,209,794

MAGNETIC ELEMENT CONTROL DEVICE, MAGNETIC ELEMENT CONTROL METHOD AND MAGNETIC DETECTION DEVICE

FUJIKURA LTD., Tokyo (JP...

1. A magnetic element control device that controls a flux-gate type magnetic element comprising an exciting coil, a detection
coil, and a feedback coil when an intensity of a stationary magnetic field which is applied to the magnetic element is detected
using a time-resolution magnetic balance system, the device comprising:
an excitation signal generation unit that generates an alternating signal;
an excitation signal adjustment unit that generates an alternating voltage signal from the alternating signal, and generates
an excitation signal which is applied to the exciting coil on the basis of the alternating voltage signal;

a detection signal comparison unit that detects a detection signal of a positive voltage or a negative voltage which is generated
by an induced electromotive force when a current direction of the excitation signal switches;

a feedback signal generation unit that converts a time width between detection signals of the positive voltage and the negative
voltage into voltage information;

a feedback signal adjustment unit that generates a feedback signal that applies a magnetic field, cancelling out the stationary
magnetic field which is applied to the magnetic element from the voltage information, to the feedback coil;

a data signal conversion unit that outputs the feedback signal as a data signal indicating a magnetic field intensity; and
an adjustment signal generation unit that outputs a direct current adjustment signal, adjusted in advance, which is superimposed
with respect to at least one of the excitation signal or the feedback signal,

wherein the excitation signal adjustment unit or the feedback signal adjustment unit generates the excitation signal or the
feedback signal on the basis of the direct current adjustment signal to apply the generated signal to the exciting coil or
the feedback coil, and generates the detection signal detected by the detection signal comparison unit so as to be deviated
with respect to a non-linear region of the excitation signal,

wherein the adjustment signal generation unit comprises a first resistor of which one end is connected to an input terminal
capable of inputting an adjustment voltage,

the excitation signal adjustment unit or the feedback signal adjustment unit comprises
a second resistor of which one end is connected to the excitation signal generation unit and the feedback signal generation
unit, and

a difference amplifier in which the first resistor and the second resistor are connected to an inverting input terminal, and
a non-inverting input terminal is connected to a reference voltage which is set in advance,

the exciting coil or the feedback coil is connected between an output terminal and the inverting input terminal of the difference
amplifier, and

the difference amplifier is configured to cause a current to flow to the exciting coil or the feedback coil so that a voltage
level of the inverting input terminal and a voltage level of the non-inverting input terminal are equal to each other.

US Pat. No. 9,321,670

OPTICAL FIBER PREFORM AND METHOD OF MANUFACTURING OPTICAL FIBER USING OPTICAL FIBER PREFORM

FUJIKURA LTD., Tokyo (JP...

1. A method of manufacturing an optical fiber using an optical fiber preform,
the method comprising:
placing a distal end of a conical portion of the optical fiber preform in a central position in a vertical direction of a
heater of a heating furnace of a fiber-drawing apparatus, the optical fiber preform comprising a tapered portion that is formed
by grinding an outer circumferential portion of a distal end portion of a quartz tube into a tapered shape; the conical portion
that is formed by welding a dummy tube to the distal end portion of the tapered portion, and by applying heat to the dummy
tube and stretching out the dummy tube, wherein a difference between an outer diameter of the dummy tube and an outer diameter
of the distal end portion of the tapered portion is from 0 mm to 5 mm; and a core rod inserted into the quartz tube;

starting fiber-drawing after placing the distal end of the conical portion of the optical fiber preform in the central position
and withdrawing a bare optical fiber which is heated and melted from the distal end of the conical portion;

at the same time as the fiber drawing is started, lowering the optical fiber preform at a lowering speed of between 5 mm/min
and 20 mm/min and accelerating a speed of the fiber-drawing at a rate of acceleration of between 20 m/min2 and 50 m/min2;

once a weld portion where the quartz tube is welded to the dummy tube has reached a range relative to the central position
of between +10% and ?10% of a length of the heater, suspending the lowering until the tapered shape in a vicinity of the weld
portion is deformed;

continuing the fiber drawing while the speed is accelerated at the same acceleration rate even while the lowering of the optical
fiber preform is suspended;

after the fiber drawing is continued until an outer diameter of the bare optical fiber reaches 10 to 20% thicker with respect
to a target outer diameter, temporarily lifting up the optical fiber preform;

when the outer diameter of the bare optical fiber reaches the target outer diameter by adjusting the outer diameter of the
bare optical fiber so as to be narrower, resuming the lowering of the optical fiber preform at a lowering speed of between
0.2 mm/min and 5 mm/min; and

accelerating the fiber drawing speed at a rate of acceleration of between 50 m/min2 and 150 m/min2 until the fiber drawing speed reaches a set line speed.

US Pat. No. 9,257,810

OPTICAL DEVICE AND FIBER LASER DEVICE

FUJIKURA LTD., Tokyo (JP...

1. An optical device comprising:
a first optical fiber in which an outer shell part is removed in a first area inclusive of an end surface thereof;
a second optical fiber in which (i) an outer shell part is removed in a second area inclusive of an end surface thereof and
(ii) the end surface of the second optical fiber is fused to the end surface of the first optical fiber;

a first medium which (a) has a refractive index lower than (I) a refractive index of an outermost shell part in the first
area of the first optical fiber and (II) a refractive index of an outermost shell part in the second area of the second optical
fiber and (b) surrounds a side surface in the entire first area of the first optical fiber; and

a second medium which (A) has a refractive index higher than a refractive index of the outermost shell part in the second
area of the second optical fiber and (B) surrounds a side surface in at least a part of the second area of the second optical
fiber,

the outermost shell part in the first area of the first optical fiber abutting, in the end surfaces of the respective first
and second optical fibers, the outermost shell part in the second area of the second optical fiber,

the second optical fiber having, at a boundary between the first medium and the second medium, a diameter larger than a diameter
in the first area of the first optical fiber; and the boundary between the first medium and the second medium being closer
to the second optical fiber than a point where the first optical fiber and the second optical fiber are fused to each other,

the first medium covering said point and a part of the second optical fiber which part is close to said point.

US Pat. No. 9,247,651

FLEXIBLE PRINTED CIRCUIT AND METHOD OF MANUFACTURING SAME

FUJIKURA LTD., Tokyo (JP...

1. A flexible printed circuit, comprising: a board composed of a base film having an insulating property and a circuit made
of a conductor pattern formed on the base film; and a sheet material stacked on the board through an adhesive agent made of
an insulating resin such that an adhesive agent layer is disposed between the sheet material and the board,
wherein the sheet material is a single layer of an insulating resin and the sheet material includes a bottom surface directly
contacting the adhesive agent layer and an end surface at one end of the sheet material,

the adhesive agent includes a leaked portion leaked from the adhesive agent layer in an outward direction relative to the
end surface to protrude upward to directly cover part of the end surface, and continuously extend from a lateral end of the
adhesive agent layer in lateral direction along a top surface of the board, the leaked portion adhering to the part of the
end surface of the sheet material to be continuous from a lower end of the end surface to form an inclined surface tapered
in the outward direction such that the inclined surface makes a descending slope starting at a top of the leaked portion directly
contacting the end surface and ending at the top surface of the board, the descending slope continuously descending from the
top of the leaked portion directly contacting the end surface to the top surface of the board,

the end surface is formed by a cut process such that the end surface has a greater surface roughness than the bottom surface,
and

the leaked portion adhering to the part of the end surface of the sheet material has an adhesion height, as measured from
the bottom surface of the sheet material, of greater than 0% and not greater than 80% of a thickness of the sheet material,
and

wherein the board is a printed board body composed of a copper-clad laminate and a coverlay attached on the copper-clad laminate,
and the sheet material is a reinforcing board to reinforce the printed board body.

US Pat. No. 9,157,969

MAGNETIC ELEMENT CONTROL DEVICE, MAGNETIC DEVICE CONTROL METHOD, AND MAGNETIC DETECTING DEVICE

FUJIKURA LTD., Tokyo (JP...

1. A magnetic element control device of controlling a magnetic element during detection of an intensity of a stationary magnetic
field by a time-resolved magnetic balance system where the magnetic field is applied to a flux-gate magnetic element that
is constituted of an excitation coil and a detecting coil,
the device comprising:
an excitation signal generator that generates an alternating signal;
an excitation signal adjuster that generates an alternating voltage signal from the alternating signal and generates an excitation
signal to be applied to the excitation coil based on the alternating voltage signal;

a detection signal comparator that detects a detection signal of a positive voltage or a negative voltage which is generated
by an induced electromotive force when an electrical current direction of the excitation signal is switched;

a feedback signal converter that converts a duration between the detection signals of the positive voltage and the negative
voltage into voltage information;

a feedback signal adjuster that, based on the voltage information, generates a feedback signal for generating a magnetic field
that cancels a stationary magnetic field that is applied to the magnetic element; and

a data signal converter that outputs the feedback signal as a data signal indicating a magnetic field intensity, wherein
the excitation signal adjuster superimposes the feedback signal on the alternating voltage signal and thereby generates the
excitation signal, and applies the generated excitation signal to the excitation coil, and

the data signal converter amplifies the feedback signal by a preset amplification rate and outputs the signal where a voltage
value that is out of a voltage range of the feedback signal, in which a magnetic field intensity generated by a voltage value
of the feedback signal and the voltage value of the feedback signal have a linearity, is saturated at the amplification rate.

US Pat. No. 9,474,159

COMPONENT-EMBEDDED BOARD AND METHOD OF MANUFACTURING SAME

FUJIKURA LTD., Tokyo (JP...

1. A component-embedded board comprising:
a first base comprising a first substrate which incorporates a first electric component, and a first electrode which is provided
on a first face of the first substrate and electrically connected to the first electric component;

a first adhesion portion provided on the first face of the first substrate;
a second electronic component fixed on the first face of the first substrate with the first adhesion portion therebetween;
a second base comprising a second substrate having an opening portion in a position at which the second electronic component
is embedded, and a second electrode exposed at a first face of the second substrate;

a second adhesion portion arranged between the first base and the second base, and fixing a second face of the second substrate
on the first face of the first substrate;

a third base comprising a third substrate and a third electrode which is exposed at a first face of the third substrate; and
a third adhesion portion arranged between the second base and the third base, and fixing a second face of the third substrate
on the first face of the second substrate, wherein

the first electrode, the second electrode, and the third electrode are electrically connected to the second electronic component,
the second electronic component is surrounded, at least, by the first adhesion portion and the third adhesion portion,
the first base comprises an inner-layer base which incorporates the first electric component, a first-side base which faces
a first face of the inner-layer base, and a second-side base which faces a second face of the inner-layer base,

the inner-layer base comprises: an inner-layer substrate which has an opening portion in a position at which the first electric
component is embedded; and a first wiring layer and a second wiring layer formed on a first face and a second face of the
inner-layer substrate, respectively,

the first-side base comprises: a first-side substrate having a first face and a second face which faces the first face of
the inner-layer substrate; a third wiring layer formed on the first face of the first-side substrate; and a first interlayer
conductive portion penetrating the first-side substrate in a thickness direction of the first-side substrate, one end of the
first interlayer conductive portion contacting the third wiring layer, and another end of the first interlayer conductive
portion contacting the first wiring layer, and

the second-side base comprises: a second-side substrate having a first face, which faces the second face of the inner-layer
substrate, and a second face; a fourth wiring layer formed on the second face of the second-side substrate; and a second interlayer
conductive portion penetrating the second-side substrate in a thickness direction of the second-side substrate, one end of
the second interlayer conductive portion contacting the second wiring layer, and another end of the second interlayer conductive
portion contacting the fourth wiring layer.

US Pat. No. 9,448,362

OPTICAL-FIBER-SPLICED PORTION REINFORCING HEATING DEVICE

FUJIKURA LTD., Tokyo (JP...

1. An optical-fiber-spliced portion reinforcing heating device comprising:
paired clamps that respectively grasp one portion of a coated portion of an optical fiber and an other portion thereof, said
one portion and the other portion being exposed from a sleeve, the optical fiber being configured to comprise the coated portion
and a fusion-spliced portion having a coating-removed portion, wherein the coated portion and the fusion-spliced portion are
covered with the sleeve;

a first force-applying member that is provided on at least one of the paired clamps that applies a pressing force sandwiching
the optical fiber;

a first cam mechanism that is configured to be displaced by being driven to rotate by motor control and thereby controls to
grasp the optical fiber due to a displacement;

at least two or more heaters that are arranged to face each other so as to sandwich the sleeve;
a second force-applying member that applies a pressing force to at least one or more of the two or more heaters with the sleeve
interposed therebetween; and

a third cam mechanism that is disposed on a camshaft on which the first cam mechanism is provided or is disposed on an other
camshaft parallel to the camshaft, is configured to be displaced by being driven to rotate by the motor control, and thereby
controls the heaters to press the sleeve due to the displacement, wherein

the motor controls a force of each of the force-applying members with respect to the clamps and the heaters by the first and
second cam mechanisms.

US Pat. No. 9,159,019

ANTENNA AND WIRELESS TAG

FUJIKURA LTD., Tokyo (JP...

1. An antenna comprising:
a ground plate provided on a first plane;
an antenna element at least part of which is provided on a second plane, the second plane being identical to the first plane
or being a plane parallel to the first plane; and

a capacitor that bridges the ground plate and a first end part of the antenna element, the first end part being opposite to
a second end part that is a power feed-side end part,

wherein:
the antenna element is a ribbon-shaped conductor; and
the capacitance of the capacitor is set so as to be not less than 0.5×Co but not greater than 1.5×Co, where Co [F] is C obtained
by substituting d=W into the following Equation (A):


wherein f [Hz] is a resonant frequency of the antenna, ? [m] is a resonant wavelength of the antenna found from ?=c/f where
c is the speed of light, h [m] is a total length of the antenna element, and W [m] is a mean width of the antenna element.

US Pat. No. 9,086,519

MULTI-CORE FIBER, AND MULTI-CORE FIBER CONNECTION METHOD USING THE SAME

FUJIKURA LTD., Tokyo (JP...

1. A multi-core fiber comprising:
a plurality of cores;
a marker which is disposed to be parallel to the cores; and
a surrounding clad which surrounds outer peripheral surfaces of the cores and the marker;
wherein the marker propagates light having a wavelength which is the same as a wavelength of light which propagates in the
cores as single mode light,

wherein the plurality of cores is arranged in a position which is symmetric with respect to a central axis of the surrounding
clad, and

wherein, in a cross-section of a fiber, a shape of the marker is asymmetric with respect to a line which passes through a
center of the surrounding clad.

US Pat. No. 9,086,555

MANUFACTURING METHOD OF OPTICAL FIBER RIBBON, AND OPTICAL FIBER RIBBON MANUFACTURED BY THE MANUFACTURING METHOD

FUJIKURA LTD., Tokyo (JP...

1. A manufacturing method of an optical fiber ribbon, in which a plurality of optical fibers are arranged in parallel to one
another, wherein each of the plurality of optical fibers is coated with a coating resin, and the plurality of optical fibers
are fixed to one another intermittently along a longitudinal direction thereof, the manufacturing method comprising:
coating the plurality of optical fibers, each of which is coated with the coating resin, with an uncured ultraviolet resin
intermittently along the longitudinal direction at a time of sending the plurality of optical fibers out from a coating dice;
and

connecting the plurality of optical fibers to one another intermittently along the longitudinal direction by curing the uncured
ultraviolet resin to form adhered portions,

wherein a Young's modulus of the coating resin is 300 MPa or more.

US Pat. No. 10,015,890

METHOD OF MANUFACTURING CONDUCTIVE LAYER AND WIRING BOARD

FUJIKURA LTD., Tokyo (JP...

1. A method of manufacturing a conductive layer on a support body, the method comprising:a first process of forming a precursor layer containing at least one of metal particles and metal oxide particles on the support body;
a second process of forming a sintering layer by irradiating an electromagnetic wave pulse on the precursor layer; and
a third process of compressing the sintering layer,
wherein the conductive layer is formed by repeating the first to third processes “N” times, where “N” denotes a natural number equal to or greater than 2, on the same location of the support body, and
the third process performed in the first to (N?1)th operations includes forming a surface of the sintering layer in an uneven shape.

US Pat. No. 9,509,055

ANTENNA

FUJIKURA LTD., Tokyo (JP...

1. An antenna comprising:
a dielectric substrate;
a ground plate provided on a first main surface of the dielectric substrate;
a feed line provided on a second main surface of the dielectric substrate; and
an antenna element connected to the feed line and standing upright on the first main surface of the dielectric substrate,
the feed line having a nonuniform width, and together with the ground plate which faces the feed line via the dielectric substrate,
the feed line constituting a microstrip line which functions as a BRF (band reject filter), and

the ground plate being provided with an opening via which the antenna element is connected to a region in which the dielectric
substrate is exposed; and

wherein the opening is entirely surrounded by the ground plate.

US Pat. No. 9,448,425

OPTICAL WAVEGUIDE ELEMENT AND OPTICAL MODULATOR

FUJIKURA LTD., Tokyo (JP...

1. An optical waveguide element, comprising:
a rib waveguide which comprises:
a core comprising a rib portion and a pair of slab portions comprising a first slab portion and a second slab portion connected
to both sides of the rib portion so as to sandwich the rib portion, wherein,

the rib portion comprises a cross-sectional dimension which allows the propagation of a fundamental mode and a higher order
mode in a predetermined single polarization state, and comprises a first P-type semiconductor and a first N-type semiconductor
forming a PN junction,

the first slab portion comprises a second P-type semiconductor and a P-type conductor connected to each other, and the second
P-type semiconductor is connected to the first P-type semiconductor of the rib portion,

the second slab portion comprises a second N-type semiconductor and an N-type conductor, and the second N-type semiconductor
is connected to the first N-type semiconductor of the rib portion,

the first and second P-type semiconductors are made of a semiconductor material comprising a P-type dopant,
the first and second N-type semiconductors are made of a semiconductor material comprising an N-type dopant,
the P-type conductor is made of a semiconductor material comprising a P-type dopant in a higher concentration than the first
and second P-type semiconductors, is electrically connected to a first electrode, and is arranged in a region where the higher
order mode propagates, and

the N-type conductor is made of a semiconductor material comprising an N-type dopant in a higher concentration than the first
and second N-type semiconductor, is electrically connected to a second electrode, and is arranged in a region where the higher
order mode propagates;

a lower cladding which is arranged between the substrate and the core;
an upper cladding which is arranged in a surrounding of the core, the first and second electrodes being formed on the upper
surface of the upper cladding;

connection conductors which electrically connect the first electrode and the P-type conductor, and the second electrode and
the N-type conductor, and pass through the upper cladding; and

a transition portion formed at an end of the rib waveguide, a width of each of the pair of slab portions increasing continuously
from zero; and

a rectangular waveguide which comprises a rectangular core portion having the same width and thickness as the rib portion
and which is connected to an end of the rib waveguide.

US Pat. No. 9,373,930

METHOD OF DETERMINING DECREASE OF OPTICAL OUTPUT POWER IN OPTICAL AMPLIFIER APPARATUS AND OPTICAL AMPLIFIER SYSTEM

FUJIKURA LTD., Tokyo (JP...

1. A method of determining a decrease of an optical output power in an optical amplifier apparatus operable to output high-power
light with use of pumping light from a pumping light source, characterized by:
acquiring a reference current Ir supplied to the pumping light source when a predetermined reference optical output power Pr that is equal to or greater than a maximum optical output power being used is outputted from the optical amplifier apparatus;

detecting a current Ii supplied to the pumping light source during an operation of the optical amplifier apparatus;

time-averaging the detected current Ii with a predetermined time constant to calculate a time-averaged current Iav;

detecting an optical output power Pi outputted from the optical amplifier apparatus during the operation of the optical amplifier apparatus;

time-averaging the detected optical output power Pi with the predetermined time constant to calculate a time-averaged optical output power Pav;

calculating an optical output power expectation value Pex represented by Pex=Iav×Pr/Ir from the time-averaged current Iav, the reference optical output power Pr, and the reference current Ir; and

comparing the time-averaged optical output power Pav with the optical output power expectation value Pex to determine a decrease of an optical output power of the optical amplifier apparatus based on the comparison result.

US Pat. No. 9,261,664

OPTICAL FIBER CABLE

FUJIKURA LTD., Tokyo (JP...

1. An optical fiber cable comprising:
a strand core including a plurality of optical fiber strands and watertight material strings;
a tape body extending in a cable longitudinal direction and covering the strand core; and
a cylindrical sheath covering the strand core and the tape body,
wherein the tape body has water permeability, and
the watertight material strings are configured to dissolve in water if the water permeates through the tape body, so that
a dissolved watertight material passes through the tape body and flows into the sheath.

US Pat. No. 10,104,779

STRETCHABLE CIRCUIT BOARD

FUJIKURA LTD., Tokyo (JP...

1. A stretchable circuit board, comprising: a stretchable base;a stretchable wiring formed on the stretchable base;
an electronic component mounted on the stretchable base;
a connecting section that electrically connects between the electronic component and the stretchable wiring, and is stretchable and formed such that its Young's modulus is greater than or equal to that of the stretchable wiring: and
a covering section formed so as to cover at least the connecting section;
wherein the covering section is formed such that its Young's modulus is higher than the Young's modulus of the connecting section; and wherein the covering section is formed such that its Young's modulus is less than 1 GPa and two or more times the Young's modulus of the connecting section.

US Pat. No. 9,650,283

METHOD OF MANUFACTURING OPTICAL FIBER AND APPARATUS OF MANUFACTURING THE SAME

FUJIKURA LTD., Tokyo (JP...

1. A method of manufacturing an optical fiber, comprising:
drawing an optical fiber preform and forming a bare optical fiber;
disposing a coating layer formed of a resin on an outer circumference of the bare optical fiber; and
curing the coating layer and obtaining an optical fiber, wherein:
a direction of the bare optical fiber is changed by a direction changer in any position from drawing the optical fiber to
disposing the coating layer;

the direction changer includes a guide groove which guides the bare optical fiber;
a blowout port of a fluid which floats the bare optical fiber wired along the guide groove is formed along the guide groove
in the guide groove;

when a direction of the bare optical fiber is changed by the direction changer, the fluid is introduced into the guide groove
from the blowout port and the bare optical fiber is floated and a Reynolds number of the fluid is in a range of 1200-3500;
and

the Reynolds number in an inlet wire portion of the bare optical fiber to the guide groove and an outlet wire portion from
the guide groove is greater than the Reynolds number in an intermediate portion between the inlet wire portion and the outlet
wire portion.

US Pat. No. 9,490,969

TRANSMISSION APPARATUS, RECEPTION APPARATUS, AND TRANSMISSION AND RECEPTION SYSTEM

FUJIKURA LTD., Tokyo (JP...

12. A transmission and reception system, comprising:
a transmission apparatus; and
a reception apparatus,
the transmission apparatus comprising:
a PLL (Phase Locked Loop) section which generates a first clock on the basis of a clock signal given to the PLL section;
a data signal transmitting section which transmits, with use of the first clock generated by the PLL section, a data signal
given to the data signal transmitting section together with the clock signal being given to the PLL section; and

a control section which measures a frequency of the clock signal with use of a second clock independent of the first clock,
the control section (i) changing setting of the transmission apparatus to setting corresponding to the measured frequency
and (ii) providing, with setting information indicative of the setting to which the setting of the transmission apparatus
has been changed, the reception apparatus to which the data signal is to be transmitted,

the reception apparatus comprising:
a data signal receiving section which (i) reproduces a clock synchronizing with a first clock with use of which the transmission
apparatus transmits a data signal, the data signal receiving section reproducing the clock from the data signal which the
transmission apparatus has transmitted and (ii) receives, with use of the clock synchronizing with the first clock, the data
signal which the transmission apparatus has transmitted;

a clock signal restoring section which restores, on the basis of the clock synchronizing with the first clock, a clock signal
with reference to which the transmission apparatus generates the first clock; and

a control section which (i) obtains, from the transmission apparatus, the setting information which is provided by the transmission
apparatus and (ii) changes setting of the reception apparatus to the setting indicated by the setting information.

US Pat. No. 9,478,328

HIGH FREQUENCY CABLE, HIGH FREQUENCY COIL AND METHOD FOR MANUFACTURING HIGH FREQUENCY CABLE

FUJIKURA LTD., Tokyo (JP...

1. A method for manufacturing a high frequency cable, comprising:
covering a central conductor made from aluminum or an aluminum alloy with a covering layer made from copper; and
wire drawing of the central conductor covered by the covering layer using dies at multiple steps, each of the dies having
a cross-section reduction rate of 20% to 29% with an entire reduction angle of 16 degrees, to form a fiber-like structure
in a longitudinal direction in the covering layer, and to form an intermetallic compound layer having greater volume resistivity
than the covering layer between the central conductor and the covering layer.

US Pat. No. 9,158,071

OPTICAL PATH-CHANGING MEMBER

FUJIKURA LTD., Tokyo (JP...

1. An optical path-changing member that is provided at a terminal of an optical fiber and installed at a position facing an
optical component in which a light input and output end is provided having an optical axis inclined with respect to a direction
of an optical axis of the terminal, the optical path-changing member comprising
a member main body which is made of a transparent material and in which a reflection section optically connecting the optical
fiber to the light input and output end is formed, wherein:

the reflection section is a first lens having a concave shape when viewed from an incident direction and making light incident
on the inside of the member main body from one of the optical fiber and the light input and output end be internally reflected
in the member main body and directed to the other of the optical fiber and the light input and output end;

a second lens having a convex shape toward the optical component is formed in a light incidence and emission surface of the
member main body, which faces the optical component;

the first lens is an aspheric lens that can make light from the optical fiber parallel by the internal reflection and make
the light be directed to the second lens or can condense light from the light input and output end and make the light be directed
to the optical fiber;

the second lens is a spherical lens that can condense light from the first lens and make the light be directed to the light
input and output end or can make light from the light input and output end parallel and make the light be directed to the
first lens;

the optical fiber is a multi-core optical fiber arranged in two stages;
an optical fiber insertion hole row in which a plurality of optical fiber insertion holes, each of which is for inserting
a core of the multi-core optical fiber therein, is arranged is formed in two or more stages in the member main body;

the first lens comprising first lenses of two or more stages are provided in lines at positions on extended lines of the optical
fiber insertion hole rows;

the second lens comprising second lenses of two or more stages are provided in lines at positions corresponding to the first
lenses;

a first lens of a first stage among the first lenses formed in the two stages has a smaller distance from a core of the multi-core
optical fiber in the first stage than a distance between a first lens of a second stage among the first lenses formed in the
two stages and a core of the multi-core optical fiber in the second stage, and can make light from the multi-core optical
fiber in the first stage be directed to the second lens of the first stage as parallel light having a smaller diameter in
contrast with the first lens of the second stage;

the light input and output end corresponding to the first lens of the first stage is a light input and output end of a light-receiving
element; and

the light input and output end corresponding to the first lens of the second stage is a light input and output end of a light-emitting
element.

US Pat. No. 9,093,748

DIPOLE ANTENNA

FUJIKURA LTD., Tokyo (JP...

1. A dipole antenna comprising:
a first antenna element; and
a second antenna element,
the first antenna element including:
a first linear section extending from a first feed point in a first direction; and
a second linear section being connected to one of ends of the first linear section via a first bending section, which one
of ends of the first linear section is on a side opposite to the first feed point, the second linear section extending from
the first bending section in a direction opposite to the first direction,

the second antenna element including:
a third linear section extending from a second feed point in the direction opposite to the first direction; and
a fourth linear section being connected to one of ends of the third linear section via a second bending section, which one
of ends of the third linear section is on a side opposite to the second feed point, the fourth linear section extending from
the second bending section in the first direction;

wherein:
the first feed point is provided on an intermediate part of the first linear section;
the second feed point is provided on an intermediate part of the third linear section;
the first linear section is provided between the third linear section and the fourth linear section; and
the third linear section is provided between the first linear section and the second linear section.

US Pat. No. 9,087,938

ELECTRODE FOR DYE-SENSITIZED SOLAR CELL, PRODUCTION METHOD OF SAME AND DYE-SENSITIZED SOLAR CELL

FUJIKURA LTD., Tokyo (JP...

1. A production method of an electrode for a dye-sensitized solar cell, comprising:
a first step of providing current collector wiring on an electrically conductive substrate; and
a second step of producing an electrode for a dye-sensitized solar cell by sequentially forming a plurality of thermoplastic
wiring protective layers on the current collector wiring so that softening points of the thermoplastic wiring protective layers
become lower as the thermoplastic wiring protective layers move away from the current collector wiring, and by heat-treating
the second and subsequent thermoplastic wiring protective layers from the current collector wiring at a heat treatment temperature
lower than a softening point of the thermoplastic wiring protective layer formed immediately prior thereto, and

wherein the plurality of thermoplastic wiring protective layers have at least two thermoplastic wiring protective layers of
which main components are formed of a glass component, and the at least two thermoplastic wiring protective layers are adjacent
to each other;

a softening point of a first thermoplastic wiring protective layer from the current collector wiring is 420° C. to 590° C.,
and

a difference in softening points between adjacent thermoplastic wiring protective layers is 10° C. to 100° C.

US Pat. No. 9,088,129

BRIDGE FIBER, COMBINER, AND FIBER LASER DEVICE

FUJIKURA LTD., Tokyo (JP...

1. A bridge fiber comprising:
a core layer; and
an outer layer which has an index of refraction higher than an index of refraction of the core layer and covers an outer peripheral
surface of the core layer, wherein

the outer layer is entirely surrounded by an atmosphere having an index of refraction lower than the index of refraction of
the outer layer,

an area of the outer layer at one end face of the bridge fiber is an area that is to be optically coupled to an end face of
a core of each of a plurality of pumping light inputting optical fibers, and

an area of the core layer at the other end face of the bridge fiber is an area that is to be optically coupled to an end face
of a core of an amplification optical fiber.

US Pat. No. 9,586,280

METHOD FOR MANUFACTURING OPTICAL MODULE

FUJIKURA LTD., Tokyo (JP...

1. A method for manufacturing an optical module, comprising:
a preparation process of preparing an optical fiber, a cladding of one end of the optical fiber is exposed;
an arrangement process of arranging the optical fiber such that at least a leading end of a part on which the cladding is
exposed is positioned in a box portion through a pipe portion in which one end of the pipe portion is connected to the box
portion configured to accommodate an optical element and the pipe portion extends to an outside of the box portion; and

a soldering process of soldering an inner wall of the pipe portion and the optical fiber by heating firstly at least a part
of a wall region of the box portion interposed between a heat dissipation portion and the pipe portion and transferring heat
from thus heated wall region to the pipe portion in a state in which a part of the box portion, in which the optical element
is accommodated, is heat-dissipated.

US Pat. No. 9,466,434

DYE-SENSITIZED SOLAR CELL

FUJIKURA LTD., Tokyo (JP...

1. A dye-sensitized solar cell comprising:
a working electrode having a porous titanium oxide layer on a conductive substrate capable of transmitting light;
a counter electrode disposed so as to face the working electrode;
a photosensitizing dye supported on the porous titanium oxide layer of the working electrode; and
an electrolyte disposed between the working electrode and the counter electrode,
wherein the porous titanium oxide layer includes an anatase crystal-type titanium oxide composed of an anatase crystal and
a rutile crystal-type titanium oxide composed of a rutile crystal,

the rutile crystal-type titanium oxide is spherical,
an average particle size of the rutile crystal-type titanium oxide is from 50 nm to 700 nm,
the porous titanium oxide layer includes a laminate consisting of a plurality of layers, and an outermost layer disposed at
a position farthest from the conductive substrate of the laminate contains the rutile crystal-type titanium oxide,

at least one intermediate layer provided between the outermost layer and the conductive substrate in the laminate contains
the anatase crystal-type titanium oxide,

a first intermediate layer disposed at a position closest to the outermost layer of the at least one intermediate layer contains
the anatase crystal-type titanium oxide and the rutile crystal-type titanium oxide,

a content of the rutile crystal-type titanium oxide in the outermost layer is greater than a content of the rutile crystal-type
titanium oxide in the at least one intermediate layer, and

a content difference between the content of the rutile crystal-type titanium oxide in the at least one intermediate layer
and the content of the rutile crystal-type titanium oxide in the outermost layer is 70% by mass or more and less than 100%
by mass, and

a content of the rutile crystal-type titanium oxide in the outermost layer is more than 70% by mass and 100% by mass or less.

US Pat. No. 9,465,167

OPTICAL-FIBER-SPLICED PORTION REINFORCING HEATING DEVICE

FUJIKURA LTD., Tokyo (JP...

1. An optical-fiber-spliced portion reinforcing heating device comprising:
paired clamps that respectively grasp one portion and the other portion of a coated portion of an optical fiber, the optical
fiber including a fusion-spliced portion, the fusion-spliced portion being coated with a sleeve, the coated portion being
exposed from the sleeve;

at least two or more heaters that are arranged to face each other so as to sandwich the sleeve;
a first force-applying member that presses at least one of the paired clamps so as to apply a tension to the optical fiber;
and

a second force-applying member that applies a pressing force to at least one or more of the heaters via the sleeve by use
of one of an elastic member and a magnetic member in accordance with control of a drive source, the heaters being arranged
to face each other with the sleeve interposed therebetween, wherein

a pressing force that is to be applied to the sleeve by the second force-applying member is set to be greater than a tension
that is to be applied to the optical fiber by the first force-applying member,

before the optical fiber is grasped, in a state in which one of the paired clamps is separated from heaters by the first force-applying
member and in a state in which the paired clamps grasp the optical fiber and a tension is not applied to the optical fiber,

the heaters press the sleeve by a pressing force by the second force-applying member, as a result of moving the optical fiber
in a pressing direction which is due to movement of the sleeve or deformation of the sleeve after starting of the press, one
of the paired clamps is drawn to a forward movement direction by a tension due to movement of the optical fiber, one of the
paired clamps is configured so as to be stopped at a position away from an end of a movable range,

therefore, in a state in which a tension is applied to the optical fiber, in one of the paired clamps, a backward movable
range in a direction away from the heaters in the longitudinal direction of the optical fiber is ensured and a forward movable
range that allows movement to the heater side is ensured, and one of the paired clamps is thereby configured to move in a
direction in which a tension that is applied to the optical fiber as a result of pressing the sleeve by the heaters and by
the second force-applying member is diminished.

US Pat. No. 9,425,662

ELECTRIC WIRE, COIL, DEVICE FOR DESIGNING ELECTRIC WIRE, AND ELECTRIC MOTOR

FUJIKURA LTD., Tokyo (JP...

1. An electric motor, comprising:
a plurality of iron cores arranged on a circle;
a plurality of coils wound with an electric wire on the plurality of iron cores, the electric wire including a central conductor
made of aluminum or aluminum alloy and a cover layer made of copper covering the central conductor; and

a rotor rotated by the plurality of coils to which alternating-current is applied, wherein
the frequency of alternating current applied to the coils is controlled by an inverter method to fall between a first frequency
and a second frequency higher than the first frequency, the first and second frequencies being frequencies at which the AC
resistance of the coil is lower than that of a coil wound with the reference copper wire.

US Pat. No. 9,184,556

OPTICAL MULTIPLEXER AND FIBER LASER

FUJIKURA LTD., Tokyo (JP...

1. An optical multiplexer, comprising:
a wavelength multiplexing unit for wavelength-multiplexing lights of a plurality of wavelengths input from input units different
for each wavelength to one multiplexed light; and

a multiplexed light converting unit for generating Raman light by at least one wavelength out of the wavelengths included
in the multiplexed light from the wavelength multiplexing unit and converting the multiplexed light from the wavelength multiplexing
unit to light of a single wavelength included in a wavelength band of the Raman light,

wherein the plurality of wavelengths includes a wavelength of high-order Raman light caused by one of the plurality of wavelengths
in the multiplexed light converting unit.

US Pat. No. 9,099,817

WATERPROOF CONNECTOR

FUJIKURA LTD., Tokyo (JP...

1. A waterproof connector which is attached to a wiring substrate, the waterproof connector comprising:
a pair of retainers between which the wiring substrate is interposed and which include an inner receiving portion formed on
opposite surfaces which face the wiring substrate; and

a first seal member which is made of a hot-melt seal material and is filled in at least the inner receiving portion,
wherein an outer receiving portion in which the first seal member is received is formed on outer surfaces and side surfaces
among surfaces of the pair of retainers which are along an inserting/separating direction of the waterproof connector, the
outer surfaces which are opposite to the opposite surfaces, the side surfaces which cross the opposite surfaces and the outer
surfaces,

a thin portion, which is formed by partially thinning the thickness between the outer surface and a bottom of the inner receiving
portion, is formed in at least one of the retainers,

the inner receiving portion communicates with the outer receiving portion at the side surfaces,
the first seal member includes:
an inner seal portion which is received in the inner receiving portion; and
a connecting seal portion which is received in the outer receiving portion positioned on the side surfaces of the retainers
and is formed integrally with the inner seal portion, and

the connecting seal portion reaches the outer surfaces of the retainers.

US Pat. No. 9,048,622

HIGH POWER PULSED LIGHT GENERATION DEVICE

FUJIKURA LTD., Tokyo (JP...

1. A high power pulsed light generation device comprising:
a master clock generator that generates a master clock signal;
an optical oscillator that generates a pulsed light synchronized with the master clock signal;
an optical amplifier that amplifies the pulsed light emitted from the optical oscillator to output a high power pulsed light;
a pump semiconductor laser that generates a pulsed light for pumping the optical amplifier;
a driving unit that drives the pump semiconductor laser by a pulsed driving current synchronized with the master clock signal;
and

a control unit which controls the driving unit and controls a gain of the optical amplifier for each pulse by changing a pulse
width of the pulsed drive current from driving unit so as to change the pulse width of the pumping pulsed light;

wherein the control unit is configured such that immediately after changing the state of the high power pulsed light generation
device from an OFF state to an ON state, the pulse width of the pulsed light for pumping corresponding to a first pulse of
the output pulsed light from the optical amplifier is longer than the pulse width of the pulsed light for pumping in a stable
ON state of the optical amplifier; and

wherein the OFF state is a state in which the driving of the pump semiconductor laser is stopped and the high power pulsed
light is not output from the optical amplifier, and the ON state is a state in which the driving of the pump semiconductor
laser is started and the high power pulsed light is output from the optical amplifier.

US Pat. No. 9,535,231

OPTICAL FIBER ASSEMBLY

FUJIKURA LTD., Tokyo (JP...

1. An optical fiber assembly comprising:
an optical fiber;
a metal tube which covers the optical fiber such that a part of the optical fiber protrudes from an end part of the metal
tube; and

an optical fiber fixing section which is configured to fix the part of the optical fiber,
wherein the optical fiber fixing section comprises a first member having a first optical fiber sandwiching surface having
a groove at an end thereof and a second member having a second optical fiber sandwiching surface, wherein the part of the
optical fiber is directly sandwiched and fixed between the first optical fiber sandwiching surface and the second optical
fiber sandwiching surface when the first member and the second member are combined together,

wherein:
the groove is configured to fit and fix the end part of the metal tube,
at least one of the first member and the second member comprising a cushion layer on its optical fiber sandwiching surface,
the first optical fiber sandwiching surface and the second optical fiber sandwiching surface sandwiching the optical fiber
so that stress applied to the optical fiber is distributed by the cushion layer,

the end part of the metal tube is fitted in the groove, and
the first optical fiber sandwiching surface and the second optical fiber sandwiching surface are configured to protrude into
an internal space of the metal tube so as to prevent the optical fiber from breakage and damage caused by the optical fiber
contacting the end part of the metal tube.

US Pat. No. 9,470,840

MULTICORE FIBER

FUJIKURA LTD., Tokyo (JP...

1. A multicore fiber comprising:
a plurality of cores; and
a cladding surrounding the plurality of cores, wherein
the plurality of cores are arranged on a linear line passing through a center of the cladding, the plurality of cores disposed
in a symmetrical pattern with respect to the center of the cladding,

the plurality of cores includes a pair of outer cores each located on an outermost side of the plurality of cores,
the plurality of cores includes at least one pair of inner cores adjacent to each other and sandwiched between the pair of
outer cores,

the plurality of cores includes a pair of cores located adjacent to each other and having different core diameters in a first
direction in which the plurality of cores is arranged on the linear line, a ratio of a core diameter in the first direction
to a core diameter in a second direction orthogonal to the first direction being different between the cores of the core pair,

each inner core has a core diameter in the first direction greater than a core diameter in the second direction,
a ratio of a core diameter in the second direction to a core diameter in the first direction for each outer core is closer
to 1 than a ratio of a core diameter in the second direction to a core diameter in the first direction for each inner core
such that an outer shape of each outer core in a cross section is closer to being circular than an outer shape of each inner
core, and

a distance between center axes of the adjacent inner cores is greater than a distance between center axes of one outer core
of the outer core pair and one inner core of the inner core pair that is located adjacent to the one outer core of the outer
core pair.

US Pat. No. 9,395,485

METHOD OF MANUFACTURING GLASS PREFORM

FUJIKURA LTD., Tokyo (JP...

1. A method of manufacturing a glass preform comprising:
a first step of vaporizing an alkali metal compound or an alkaline earth metal compound, wherein the alkali metal compound
or the alkaline earth metal compound is brought into contact with a hydroxyl group on a surface of porous silica glass manufactured
by a thermal oxidation by oxyhydrogen flame;

a second step of dehydrating the porous silica glass; and
a third step of sintering the dehydrated porous silica glass and forming a transparent glass body,
wherein the porous silica glass is doped with an alkali metal oxide or an alkaline earth metal oxide at the same time as the
porous silica glass is dehydrated, and during the doping and the dehydration, the entire porous silica glass is evenly heated.

US Pat. No. 9,601,853

PRINTED WIRING BOARD AND CONNECTOR CONNECTING THE WIRING BOARD

FUJIKURA LTD., Tokyo (JP...

1. A printed wiring board comprising:
a base substrate;
a plurality of pads for electrical connection that are disposed at one surface side of the base substrate and at a connection
end portion of the base substrate to be connected with a connector, the plurality of pads forming front and rear two arrays
when viewed in a direction of connection with the connector;

a plurality of wirings that are connected with the pads;
an engageable part that is formed at the connection end portion of the base substrate and is to be engaged with an engagement
part of the connector in a direction of disconnection, and

a reinforcement layer that is disposed at the one surface side of the base substrate and at a frontward side with respect
to the engageable part when viewed in a direction of connection with the connector, and that is formed integrally with any
of the pads, wherein

the plurality of wirings include first wirings and second wirings,
the first wirings are disposed at the other surface side of the base substrate and are connected with first pads of the front
array of the plurality of pads disposed at the one surface side of the base substrate via vias penetrating the base substrate,

the second wirings are disposed at the other surface side of the base substrate and are connected with second pads of the
rear array of the plurality of pads disposed at the one surface side of the base substrate via vias penetrating the base substrate,

each of the wirings has an expanded-width part,
each of the first wirings has a first expanded-width part provided at a position on the other surface side of the base substrate
corresponding to the first pads,

each of the second wirings has a part that is formed to have a second expanded-width part provided at a position on the other
surface side of the base substrate corresponding to the second pads,

each of the first expanded-width parts has substantially the same shape as the shape of the first pads, and
each of the second expanded-width parts has substantially the same shape as the shape of the second pads.

US Pat. No. 9,400,357

OPTICAL CONNECTOR

FUJIKURA LTD., Tokyo (JP...

1. An optical connector comprising:
a first housing;
a first ferrule which is embedded in the first housing;
a second housing which is detachably fitted to the first housing; and
a second ferrule which is embedded in the second housing and is butt-jointed to the first ferrule when the second housing
is fitted to the first housing,

wherein the first housing includes a tubular outer housing, and a tubular inner housing which is accommodated in the outer
housing to be movable in a center axis direction of the outer housing and which accommodates the first ferrule,

a pair of engagement pieces which are arranged in a vertical width direction perpendicular to the center axis direction of
the outer housing are formed in the inner housing,

a pair of engaged pieces which are arranged in the vertical width direction and are respectively engaged with the engagement
pieces so as to allow the second housing to be fitted to the inner housing are formed in the second housing,

a pair of elastic locking pieces which are arranged in the vertical width direction is provided in an outer circumference
of the inner housing,

a pair of restriction locking portions which are arranged in the vertical width direction and are respectively locked to the
pair of elastic locking pieces in a state where the second housing is separated from the first housing so as to restrict movement
of the inner housing with respect to the outer housing are formed in the outer housing, and

a pair of locking releasing pieces which are arranged in the vertical width direction while extending toward the first housing,
and allow the pair of elastic locking pieces to be elastically displaced toward the inside by further moving the second housing
toward the first housing side in a state where the pair of engagement pieces are engaged with the pair of engaged pieces so
as to release a state where the pair of restriction locking portions and the pair of elastic locking pieces are locked, are
formed in the second housing.

US Pat. No. 9,239,365

MAGNETIC ELEMENT CONTROL DEVICE, MAGNETIC ELEMENT CONTROL METHOD AND MAGNETIC DETECTION DEVICE

FUJIKURA LTD., Tokyo (JP...

1. A magnetic element control device that controls a flux-gate type magnetic element when an intensity of a stationary magnetic
field which is applied to the magnetic element having an exciting coil and a detection coil is detected using a time-resolution
magnetic balance system, comprising:
an excitation signal generation unit that generates an alternating signal;
a detection signal comparison unit that detects a detection signal of a positive voltage or a negative voltage which is generated
at the detection coil by an induced electromotive force when a direction of an excitation current which flows to the excitation
coil switches;

a feedback signal conversion unit that converts a time width between detection signals of the positive voltage and the negative
voltage into voltage information;

a feedback signal adjustment unit that generates a feedback signal that generates a magnetic field that cancels out the stationary
magnetic field which is applied to the magnetic element, from the voltage information;

a data signal conversion unit that outputs the feedback signal as a data signal indicating a magnetic field intensity;
an adjustment signal generation unit that generates an offset signal that cancels an offset component which is superimposed
on the data signal; and

an excitation signal adjustment unit that generates an alternating current, a feedback current, and an offset current from
the alternating signal, the feedback signal, and the offset signal, respectively, superimposes the feedback current and the
offset current on the alternating current, and generates the excitation current which is applied to the exciting coil.

US Pat. No. 9,158,078

LASER MODULE

FUJIKURA LTD., Tokyo (JP...

1. A laser module, comprising:
a laser mount having thereon a laser source that emits a laser beam;
a fiber mount having thereon an optical fiber that receives the laser beam;
a submount on which the laser mount and the fiber mount are placed; and
a substrate on which the submount is placed,
the substrate having a spacer thereon, the spacer keeping a gap between the submount and the substrate, and
the submount being joined to the substrate with solder spread between the submount and the substrate,
wherein:
a surface of the submount which faces the substrate is partially metallized; and
the submount is placed on the substrate so that the spacer abuts against an unmetallized portion of the surface of the submount.

US Pat. No. 9,588,284

MULTI-CORE FIBER

FUJIKURA LTD., Tokyo (JP...

1. A multi-core fiber comprising:
nine or more core elements each including a core that propagates light of at least up to a second-order LP mode in a C band
and an L band, an inner cladding layer that surrounds an outer circumferential face of the core and has a refractive index
lower than a refractive index of the core, and a trench layer that surrounds an outer circumferential face of the inner cladding
layer and has a refractive index lower than the refractive index of the inner cladding layer; and

an outer cladding that surrounds outer circumferential faces of the trench layers and has a refractive index higher than the
refractive index of the trench layer and lower than the refractive index of the core,

wherein effective refractive indices of light propagating through cores adjacent to each other are different from each other
such that a magnitude of crosstalk of light of a highest-order LP mode commonly propagating through the cores adjacent to
each other between the cores adjacent to each other becomes a peak at a bending diameter smaller than a diameter of 100 mm,
and

wherein the core has a higher refractive index in an area including a center axis than in an area disposed on an outer circumferential
side such that a differential mode group delay of the core is 700 picoseconds/km or less.

US Pat. No. 9,589,736

DYE-SENSITIZED SOLAR CELL ELEMENT

FUJIKURA LTD., Tokyo (JP...

1. A dye-sensitized solar cell element comprising at least one dye-sensitized solar cell,
wherein the dye-sensitized solar cell includes:
a first electrode;
a second electrode which faces the first electrode; and
an oxide semiconductor layer which is provided on the first electrode,
wherein the oxide semiconductor layer includes:
a light absorbing layer which is provided on the first electrode; and
a reflecting layer as a layer which is in contact with a portion of a first surface of a side opposite to the first electrode
among surfaces of the light absorbing layer and which is arranged at a position farthest from the first electrode,

wherein the first surface of the light absorbing layer includes a second surface which is in contact with the reflecting layer,
wherein a surface area S1 of the first surface and a surface area S2 of the second surface satisfy the following formula:

0.7?S2/S1<1

wherein the reflecting layer is arranged in an inner side of the first surface of the light absorbing layer, wherein a non-contact
portion of the first surface which is not in contact with the reflecting layer is not arranged in an inner side of the second
surface, and

wherein the second surface is surrounded by the non-contact portion.

US Pat. No. 9,541,710

OPTICAL FIBER HOLDING DEVICE

FUJIKURA LTD., Tokyo (JP...

1. An optical fiber holding device comprising:
a holder including a base and a lid which are openable and closable, the holder being configured to sandwich an optical fiber
when the base and the lid are in a closed state and thereby holds the optical fiber, the holder comprising: an elastic body;
a drive unit configured to generate driving power; and a pusher, the pusher being configured to generate a pressing force
based on the driving power generated by the drive unit and press the lid by the pressing force via the elastic body, the lid
and the base being configured to sandwich and hold the optical fiber based on the pressing force transmitted through the elastic
body when the lid is pressed by the pusher via the elastic body, the drive unit being a motor that generates a rotating drive
force as the driving power, the pusher comprising a screw member that linearly moves based on the rotating drive force and
thereby generates a pressing force, and the pusher being configured to stop the linear motion of the screw member and maintain
the pressing force in the case where the drive unit is stopped and the rotating drive force is not generated.

US Pat. No. 9,507,082

TWO-MODE OPTICAL FIBER AND LIGHT TRANSMISSION PATH

FUJIKURA LTD., Tokyo (JP...

1. A two-mode optical fiber for propagating an LP01 mode and an LP11 mode which are components of a signal light,
said two-mode optical fiber comprising:
an inner core having an ?th-power-type refractive index distribution and a maximum refractive index of n1;

an outer core surrounding the inner core and having a refractive index of n1?; and

a clad surrounding the outer core and having a refractive index of n2 (n1?
wherein a mode dispersion ?? defined by the following mathematical formula (2) is constant in a predetermined wavelength band:
wherein vg11 represents a group velocity of the LP11 mode component and vg01 represents a group velocity of the LP01 mode component,
said two-mode optical fiber satisfying the following three conditions 1 to 3:
Ra?0.7;  (Condition 1)
0.1?Rd?0.5; and  (Condition 2):
1.0???10.0,  (Condition 3):where:
a radius of the inner core is set to r1;

a radius of an outer circumference of the outer core is set to a;
a relative refractive index difference between the outer core and the clad is set to ??;
a relative refractive index difference between the inner core and the clad is set to ?+,
Ra=r1/a; and

Rd=|??|/|?+|.

US Pat. No. 9,494,743

OPTICAL FIBER SPLICING UNIT, OPTICAL FIBER SPLICING METHOD, AND HOLDING MEMBER FOR OPTICAL FIBER SPLICING UNIT

FUJIKURA LTD., Tokyo (JP...

1. An optical fiber splicing unit, comprising:
a mechanical splice which aligns optical fibers and puts the optical fibers between half-split elements to splice the optical
fibers to each other;

a splice holder portion which holds the mechanical splice;
anchoring fixation members that are respectively fixed to the optical fibers;
fixing member guide portions which are configured to respectively guide the anchoring fixation members at two sides of the
held mechanical splice and to respectively allow the anchoring fixation members to advance toward the mechanical splice when
splicing the optical fibers; and

a first spacer which is configured to restrict the advancement of a first anchoring fixation member by abutting the first
anchoring fixation member and is disposed to be configured to retract from a position in which the first spacer abuts the
first anchoring fixation member, wherein

a first optical fiber is fixed to the first anchoring fixation member,
when gripping and fixing a tip of the first optical fiber to the mechanical splice in a state in which a first anchoring fixation
member abuts a first spacer which restricts advancement of the first anchoring fixation member, the first anchoring fixation
member is configured to advance toward the mechanical splice by retracting the first spacer, and

a bend is configured to be formed in the first optical fiber between the mechanical splice and the first anchoring fixation
member by the advancement of the first anchoring fixation member.

US Pat. No. 9,478,849

ANTENNA DEVICE

FUJIKURA LTD., Tokyo (JP...

1. An antenna device, comprising:
an antenna element constituting a plane; and
an electric conductor plate provided so as to face the antenna element,
the antenna element and the electric conductor plate being short-circuited, and the antenna element being directly connected
with a pair of electric conductors constituting a feed line, wherein:

the antenna element has a path which continues from one end part of the antenna element to the other end part of the antenna
element;

the one and the other end parts of the antenna element are connected with the respective pair of electric conductors constituting
the feed line;

the antenna element has a wind section made up of (a) a first root section including the one end part of the antenna element
and (b) a second root section including the other end part of the antenna element;

the first root section and the second root section (c) surround a feed section with which the pair of electric conductors
constituting the feed line are connected and (d) are drawn out in respective opposite directions;

the first root section has (i) a first linear part that extends in a first direction from the one end part of the antenna
element, (ii) a first bending part that extends, from an end part of the first linear part, in a second direction perpendicular
to the first direction, (iii) a second linear part that extends, from an end part of the first bending part, in a direction
opposite to the first direction, (iv) a second bending part that extends, from an end part of the second linear part, in a
direction opposite to the second direction, and (v) a third linear part that extends, from an end part of the second bending
part, in the first direction; and

the second root section has (vi) a fourth linear part that extends, from the other end part of the antenna element, in the
direction opposite to the first direction, (vii) a third bending part that extends, from an end part of the fourth linear
part, in the direction opposite to the second direction, (viii) a fifth linear part that extends, from an end part of the
third bending part, in the first direction, (ix) a fourth bending part that extends, from an end part of the fifth linear
part, in the second direction, and (x) a sixth linear part that extends, from an end part of the fourth bending part, in the
direction opposite to the first direction,

wherein the antenna element has:
a first antenna section that continues to the first root section and has a meander shape whose return direction is perpendicular
to the first direction; and

a second antenna section that continues to the second root section, extends in the first direction, and has a linear shape.

US Pat. No. 9,459,412

OPTICAL CONNECTOR RECEPTACLE, RECEPTACLE HOUSING, OPTICAL CONNECTOR ADAPTER, AND ADAPTER HOUSING

FUJIKURA LTD., Tokyo (JP...

1. An optical connector receptacle comprising:
a ferrule to which an optical fiber is inserted and fixed;
a receptacle housing holding the ferrule;
a flange protruding from an external surface of the receptacle housing;
an elastic deformation portion extending from the flange along the external surface of the receptacle housing; and
a locking protruding portion protruding from the elastic deformation portion to the opposite side of the external surface
of the receptacle housing, wherein

the flange, the elastic deformation portion, and the locking protruding portion are formed integrally with the receptacle
housing,

the optical connector receptacle is attachable to an attachment wall by sandwiching a peripheral edge of an attachment hole
of the attachment wall between the flange and the locking protruding portion, and

a state where the locking protruding portion is locked by the peripheral edge of the attachment hole of the attachment wall
is releasable as a result of elastically deforming the elastic deformation portion to be directed to the external surface
of the receptacle housing.

US Pat. No. 9,423,667

HIGH-FREQUENCY CIRCUIT AND OPTICAL MODULATOR

FUJIKURA LTD., Tokyo (JP...

1. A high-frequency circuit comprising:
a termination resistor embedded to a surface of a substrate; and
a signal line formed on the surface of the substrate, the signal line having a junction segment that starts at a start position
and ends at an end position, the start position being short of a termination point of the signal line, the end position being
the termination point, the junction segment covering a portion of an upper surface of the termination resistor so that at
least a portion along a width of the junction segment that extends from the start position to the end position is connected
to the termination resistor,

a width of the signal line at the start position of the junction segment being equal to or greater than a width of the upper
surface of the termination resistor at the start position.

US Pat. No. 9,377,588

FERRULE AND OPTICAL-FIBER-ATTACHED FERRULE

FUJIKURA LTD., Tokyo (JP...

1. A ferrule comprising:
a ferrule main body having a front edge, a rear edge, a top surface and a lower surface;
a fiber insertion hole, extending into the ferrule main body from the rear edge of the ferrule main body;
a first recess provided in the top surface of the ferrule main body, the first recess comprising a reflection surface which
is a rear surface of the first recess, wherein the reflection surface reflects light on an optical path between the fiber
insertion hole and a light emission-launch portion;

the light emission-launch portion provided in the lower surface of the ferrule main body;
a locating pin extending outward from the lower surface of the ferrule main body and disposed between the light emission launch
portion and the front edge of the ferrule main body; and

a second recess provided in the lower surface of the ferrule main body and disposed between the light emission-launch portion
and the locating pin,

wherein A is a distance from an axis line of the locating pin to the front edge of the ferrule main body, B is a distance
from the axis line of the locating pin to a front surface of the second recess, and 0.7?A/B?1.3; and

T is a height of the ferrule from the top surface of the ferrule main body to the lower surface of the ferrule main body,
C is a depth of the second recess from the lower surface of the ferrule main body to a topmost portion of the second recess,
and C?0.4T.

US Pat. No. 9,552,913

SUPERCONDUCTING COIL AND SUPERCONDUCTING DEVICE

FUJIKURA LTD., Tokyo (JP...

1. A superconducting coil, comprising:
first and second pancake coils that are formed by winding a superconducting wire, are stacked in a thickness direction, and
are adjacent to each other;

a cooling substrate that is interposed between the first and second pancake coils and is formed of a plurality of cooling
plates, the plurality of the cooling plates overlapping in a contact state and being separable from each other,

cooling plates that are disposed on the uppermost surface and the lowermost surface of the first and second pancake coils,
and

a bonding element that bonds at least a pair of upper and lower cooling plates and the first pancake coil to each other and
bonds at least a pair of upper and lower cooling plates and the second pancake coil to each other, wherein

the cooling plates are formed of a metal material, and the first and second pancake coils are separable from each other by
separation between the plurality of the cooling plates.

US Pat. No. 9,529,151

POLARIZATION CONVERSION ELEMENT

FUJIKURA LTD., Toyko (JP...

1. A polarization conversion element comprising an optical waveguide formed on a substrate,
the optical waveguide comprising sequentially a first waveguide portion, a polarization rotation portion, and a second waveguide
portion, wherein:

in the first waveguide portion, an eigen mode of waveguide light on a sectional surface of the first waveguide portion comprises
at least one TE mode and one TM mode, and an effective refractive index of the TE mode having the highest effective refractive
index is higher than an effective refractive index of the TM mode having the highest effective refractive index;

in the second waveguide portion, an eigen mode of waveguide light on a sectional surface of the second waveguide portion comprises
at least one TE mode and one TM mode, and an effective refractive index of the TM mode having the highest effective refractive
index is higher than an effective refractive index of the TE mode having the highest effective refractive index;

a height of a waveguide structure of the first waveguide portion and a height of a waveguide structure of the second waveguide
portion are equal to each other;

a waveguide structure of the polarization rotation portion has at least two heights in a height direction from the substrate,
and the waveguide structure comprises a thick plate portion having the same height as that of the waveguide structure of the
first waveguide portion and the second waveguide portion, and a thin plate portion having a thickness thinner than that of
the thick plate portion;

the waveguide structure of the polarization rotation portion comprises a portion of which a sectional surface is asymmetric
in a width direction and is also asymmetric in a height direction;

waveguide structures having the same height continuously exist between the waveguide structure of the first waveguide portion,
the thick plate portion of the polarization rotation portion, and the waveguide structure of the second waveguide portion;
and

the polarization rotation portion has a length of the longitudinal direction that allows an mode conversion to be performed
adiabatically.

US Pat. No. 9,517,964

METHOD FOR PRODUCING OPTICAL FIBER PREFORM

FUJIKURA LTD., Tokyo (JP...

1. A method for producing an optical fiber preform, comprising:
providing a porous glass base material to a furnace core tube of a dehydration-sintering furnace, the furnace core tube being
filled with air having a heat conductivity higher than a heat conductivity of argon gas;

beginning to replace the air in the furnace core tube with argon gas;
beginning to allow a temperature of the porous glass base material to increase when 30% to 90% of a volume of the air in the
furnace core tube is replaced with argon gas so that 70% to 10% of a volume of the air remains in the furnace core tube in
a case where a total volume of the air and the argon gas is defined as 100% by volume in the furnace core tube;

heating to dehydrate the porous glass base material using a dehydrating agent, the dehydrating agent being diluted by argon
gas; and

sintering the dehydrated porous glass base material.

US Pat. No. 9,431,787

AMPLIFICATION OPTICAL FIBER AND FIBER LASER DEVICE USING THE SAME

FUJIKURA LTD., Tokyo (JP...

1. An amplification optical fiber comprising: a core; and a clad surrounding the core, the amplification optical fiber allowing
light having a predetermined wavelength to propagate in at least an LP01 mode and an LP11 mode, wherein
the core includes a first core portion covering a center area of the core and a second core portion surrounding the first
core portion,

a refractive index of the first core portion is higher than that of the clad,
a refractive index of the second core portion is higher than that of the first core portion,
when light of the LP01 mode and light of the LP11 mode are standardized by power, in the core, an active element that stimulates
to emit light of the predetermined wavelength is doped at a higher concentration in at least a part of an area where power
of light of the LP01 mode is larger than that of light of the LP11 mode than at least a part of an area where the power of
light of the LP11 mode is larger than that of light of the LP01 mode to satisfy the formula:

?0?n(r)×{I01(r)?I11(r)}rdr>0
wherein, r represents a distance from the center in the radial direction of the core, Ioi(r) represents the power of light of the LP01 mode at the distance r from the center in the radial direction of the core,
I11(r) represents the power of light of the LP11 mode at the distance r from the center in the radial direction of the core,
and n(r) represents an additive concentration of the active element at the distance r from the center in the radial direction
of the core.

US Pat. No. 9,400,352

POLARIZATION-MAINTAINING OPTICAL FIBER

FUJIKURA LTD., Tokyo (JP...

1. A polarization-maintaining optical fiber comprising:
a core;
a pair of stress-applying parts disposed at both sides of the core at a distance; and
a cladding coat that surrounds the core and the paired stress-applying parts, wherein the cladding coat comprises:
a first cladding coat disposed around the core;
a second cladding coat disposed around the first cladding coat; and
a third cladding coat disposed around the second cladding coat, wherein
a maximum refractive index of the core is greater than each of maximum refractive indexes of the first cladding coat, the
second cladding coat, and the third cladding coat,

a maximum refractive index of the second cladding coat is lower than each of maximum refractive indexes of the first cladding
coat and the third cladding coat,

a coefficient of thermal expansion of each of stress-applying parts is greater than a coefficient of thermal expansion of
the cladding coat, and

each stress-applying part is provided to cut the second cladding coat at a position in a circumferential direction, and wherein
each stress-applying part is provided to protrude from a boundary between the second cladding coat and the third cladding
coat in a radial-outer direction, and

each stress-applying part is in contact with the first cladding coat, the second cladding coat, and the third cladding coat.

US Pat. No. 9,380,928

STRUCTURE OF IMAGING PART IN ELECTRONIC VISUALIZED CATHETER

FUJIKURA LTD., Tokyo (JP...

1. An imaging part of an electronic visualized catheter, the imaging part comprising:
an object lens system;
a solid state imaging element which is positioned to receive light output from the object lens system and which photoelectrically
converts the light output from the object lens system into an electric signal, wherein the solid state imaging element has
a rectangular shape;

a flexible printed wiring board which is a bent structure having a U-shape; and
a sleeve with a hollow tubular shape comprising a distal end portion which is open, wherein:
an output lens face of the object lens system is planar, and the output lens face is joined to a light receiving surface of
the solid state imaging element;

the flexible printed wiring board comprises a bottom plate portion, a first side wall plate portion, and a second side wall
plate portion that form the U-shape, wherein the first side wall plate portion and the second side wall plate portion are
each a continuous extension of the bottom plate portion, and each extends from the bottom plate portion in a direction away
from the distal end portion;

the bottom plate portion comprises an opening that penetrates a plate surface of the bottom plate portion;
the solid state imaging element is disposed on a first surface of the bottom plate portion away from the distal end portion,
wherein the first surface faces an inner space surrounded by the bottom plate portion, the first side wall plate portion,
and the second side wall plate portion and is joined to a second surface of the solid state imaging element that comprises
the light receiving surface,

the first side wall plate portion and the second side wall plate portion are folded along opposite sides of the solid state
imaging element, and the light receiving surface of the solid state imaging element faces the distal end portion, and is exposed
through the opening in the bottom plate portion;

the output lens face is disposed within the opening in the bottom plate portion;
the object lens system, the solid state imaging element, and the flexible printed wiring board are disposed within the sleeve
such that an incident lens face, opposite the output lens face, is positioned at the distal end portion of the sleeve;

the flexible printed wiring board comprises a plurality of conductor wiring layers, wherein the plurality of conductor wiring
layers comprise at least one conductor wiring layer which is electrically connected to a terminal portion of the solid state
imaging element and extends along the first side wall plate portion;

the plurality of conductor wiring layers further comprise at least one conductor wiring layer which extends along the second
side wall plate portion; and

the flexible printed wiring board further comprises a plurality of terminal electrodes positioned to electrically connect
to one or more electrical cables which extend to an outside from within the sleeve, and each of the plurality of conductor
wiring layers is electrically connected to one of the plurality of terminal electrodes.

US Pat. No. 9,232,662

MANUFACTURING METHOD FOR WIRING BOARD

FUJIKURA LTD., Tokyo (JP...

1. A manufacturing method for a wiring board, comprising:
preparing a first substrate, the first substrate comprising a first insulating sheet and a first wiring formed on one main
surface of the first insulating sheet;

preparing a mold having a stamping surface, the stamping surface including a convex portion and a projection, the convex portion
being formed depending on a wiring pattern constituting at least a part of patterns of a second substrate to be laminated
on the first substrate, the projection being formed depending on a via pattern constituting at least a part of the patterns;

locating the stamping surface of the mold to face one main surface side of a second insulating sheet and heating the second
insulating sheet to a first set temperature to press the mold against the one main surface of the second insulating sheet
so that at least an end portion of the projection of the stamping surface is exposed at other main surface side of the second
insulating sheet;

heating at least the second insulating sheet to a second set temperature to laminate the second insulating sheet on the first
insulating sheet so that the end portion of the projection exposed at the other main surface of the second insulating sheet
contacts the first wiring of the first insulating sheet;

cooling at least the second insulating sheet to release the mold from the second insulating sheet; and
filling a conductive material in a groove portion and a hole, the groove portion and the hole being formed in the second insulating
sheet respectively by the convex portion of the mold and the projection of the mold.

US Pat. No. 9,814,131

INTERCONNECTION SUBSTRATE

FUJIKURA LTD., Koto-ku, ...

1. An interconnection substrate, comprising:
a substrate having a first surface and a second surface opposite the first surface;
a thermal relaxation resin provided on the first surface; and
a transmission line including two parallel surface wirings formed on the thermal relaxation resin and two parallel through-hole
interconnections, the two parallel through-hole interconnections being exposed to the first and second surfaces and being
formed inside the substrate, and one of the two parallel through-hole interconnections being electrically connected to one
of the two surface wirings and an other of the two parallel through-hole interconnections being electrically connected to
an other of the two surface wirings, wherein

at least one of the two through-hole interconnections includes a narrow portion having a smaller diameter than a diameter
of the through-hole interconnection in the first surface and a diameter of the through-hole interconnection in the second
surface, and

the two surface wirings are connected to respective through-hole interconnections through a pitch adjusting portion configured
to adjust each wiring pitch.

US Pat. No. 9,586,852

METHOD OF MANUFACTURING PREFORM FOR MULTICORE FIBER AND METHOD OF MANUFACTURING MULTICORE FIBER

FUJIKURA LTD., Tokyo (JP...

1. A method of manufacturing a preform for a multicore fiber, comprising:
a preparation process of preparing for a plurality of core rods, a plurality of clad rods, and a clad tube, the respective
core rods include a core element layer having a refractive index higher than the clad rods;

an arrangement process of arranging the plurality of core rods and the plurality of clad rods in a tube of the clad tube,
in a state in which distances between center axes of the adjacent core rods become equal to each other and a state in which
parts of outer circumferential surfaces in the adjacent rods contact; and

an integration process of integrating the clad tube and the plurality of core rods and the plurality of clad rods arranged
in the tube,

wherein, in the arrangement process, a ratio of a total cross-sectional area of a direction orthogonal to a length direction
in the plurality of core rods and the plurality of clad rods with respect to an internal cross-sectional area of the tube
of a direction orthogonal to a length direction in the clad tube is 0.84 or more,

wherein the internal cross-sectional area of the tube is an area of a region surrounded by an inner circumference of cross-section
of the tube, and the total cross-sectional area in the plurality of core rods and the plurality of clad rods is a sum of a
cross-sectional area of all of the core rods arranged in the tube and a cross-sectional area of all of the clad rods arranged
in the tube,

wherein, in the preparation process, first clad rods having a diameter equal to a diameter of the core rods and second clad
rods having a diameter smaller than the diameter of the first clad rods are prepared, and

in the arrangement process, the plurality of core rods and the first clad rods are arranged in a state in which a cross-sectional
shape coupling centers of the three adjacent rods becomes a triangle and a state in which parts of the outer circumferential
surfaces in at least the two core rods of the plurality of core rods contact an inner circumferential surface of the clad
tube and the second clad rods are arranged in a state in which the second clad rods contact parts of the outer circumferential
surfaces in the core rods which are contacting the inner circumferential surface of the clad tube, parts of the inner circumferential
surface in the clad tube, and parts of the outer circumferential surfaces of the core rods sandwiched by the core rods contacting
the inner circumferential surface of the clad tube.

US Pat. No. 9,559,449

PRINTED WIRING BOARD AND CONNECTOR CONNECTING THE WIRING BOARD

FUJIKURA LTD., Tokyo (JP...

1. A printed wiring board to be connected with an engagement part of a connector connected to ground, the printed wiring board
comprising:
a base substrate;
a plurality of pads for electrical connection that are disposed at one surface side of the base substrate and at a connection
end portion to be connected with the connector;

wirings that are connected with the pads;
an engageable part that is formed at a side edge part of the connection end portion and is to be engaged with the engagement
part of the connector in a direction of disconnection;

a reinforcement layer that is disposed at the one surface side of the base substrate and at a frontward side with respect
to the engageable part when viewed in a direction of connection with the connector, and that is formed integrally with at
least any one of the pads and wirings; and

an insulating layer that covers a surface of the reinforcement layer, wherein
the insulating layer is disposed at outer side of the pads in the width direction and from a side position of the pads to
the front side end position of the connection end portion so as not to cover the pads.

US Pat. No. 9,543,733

PHOTONIC BANDGAP FIBER AND FIBER LASER DEVICE USING SAME

FUJIKURA LTD., Tokyo (JP...

1. A photonic bandgap fiber comprising:
a core region; and
a cladding region having a large number of high refractive index portions disposed in a triangular lattice shape to surround
the core region, the high refractive index portions having a refractive index higher than a refractive index of the core region,
the cladding region including a medium having a refractive index equal to the refractive index of the core region and provided
among the high refractive index portions, the photonic bandgap fiber being used in a state in which at least a part of the
photonic bandgap fiber is bent with a predetermined bending radius, wherein

the large number of the high refractive index portions are disposed in a nineteen-cell core type in three layers,
a V value is 1.5 or greater and 1.63 or less, and
Expression (1) and Expression (2) below are satisfied where a relative refractive index difference of the high refractive
index portions to the medium is defined as ?%, a lattice constant is defined as ? ?m, and the predetermined bending radius
is defined as R cm,

AHOM+BHOM+CHOM2+DHOM3???AFM+BFM+CFM2+DFM3  (1)

15?R?25  (2)
where
AHOM==171.37687+2.093345R?0.1275714R2
BHOM=?43.29906+0.530802R+0.011094R2
CHOM=3.48397?0.098659R+0.000365R2
DHOM=?0.09034+0.003584R?0.0000348R2
AFM=89.98658?2.94759R+0.04246R2
BFM=?17.33858+0.743907R?0.011185R2
CFM=1.0904?0.054614R+0.0008568R2 and

DFM=?0.02229+0.001232R?0.00002R2,

wherein the V value is obtained by:

where ? is a use wavelength, d is a diameter of the respective high refractive index portions, nhigh is the refractive index of the high refractive index portions, and nlow is the refractive index of the medium provided among the high refractive index portions.

US Pat. No. 9,429,717

FERRULE AND FERRULE WITH OPTICAL FIBER

FUJIKURA LTD., Tokyo (JP...

1. A ferrule for optically connecting an optical fiber to an optical part, the ferrule comprising:
a boot accommodating hole which is configured to accommodate a boot attached to the optical fiber and which is formed on a
rear end surface of the ferrule;

an optical fiber hole which is configured to position an intermediate portion of the optical fiber having an outer diameter
and which extends forward from a front end of the boot accommodating hole; and

a recess configured for an adhesive to be disposed therein and comprising a first inner wall from which a front end of the
optical fiber positioned by the optical fiber hole is protrudable, and a second inner wall opposite to the first inner wall,
wherein:

the second inner wall is configured to be abutted by almost an entire area of a front end surface of the optical fiber;
a bottom of the recess is positioned lower than a lower edge of the front end of the optical fiber that protrudes from the
first inner wall;

the recess comprises an adhesive application slot with an opening larger than a distance between the first inner wall and
the second inner wall, the first inner wall comprising a first inclined surface, and the second inner wall comprising a second
inclined surface which does not reach a front face of the ferrule; and

the distance between the first inner wall and the second inner wall is greater than or equal to half of the outer diameter
of the optical fiber and less than or equal to four times the outer diameter of the optical fiber,

wherein the ferrule further comprises further comprises a reflecting portion reflecting light on an optical path between the
front end of the optical fiber positioned by the optical fiber hole and the optical part,

wherein a plurality of the optical fibers is fixed, and the reflecting portion comprises a recessed reflecting surface and
is provided to each of the plurality of the optical fibers, and

wherein a plurality of the reflecting portions is arranged in an arrangement direction of the plurality of the optical fibers.

US Pat. No. 9,399,789

BASE BODY AND METHOD OF MANUFACTURING BASE BODY

FUJIKURA LTD., Tokyo (JP...

1. A method of manufacturing the base body for trapping microorganisms or cells, comprising:
preparing a substrate formed of a single member;
irradiating, with a laser having a pulse duration on an order of picoseconds or less, areas in the substrate which become
fine vacuum holes communicating with an outside of the substrate and forming modified regions in the areas;

forming at least one of a well and a fluidic channel as a space which communicates with the fine vacuum holes and which allows
fluid including microorganisms or cells to flow in the substrate such that the space opens to a first face of the substrate
that has an inner side surface along a thickness direction of the substrate; and

removing the modified regions from the substrate through etching thereby forming the fine vacuum holes such that a first end
of each of the fine vacuum holes opens to the inner side surface and communicates with the space and such that a second end
of each of the fine vacuum holes is exposed to a second face of the substrate and communicates with the outside of the substrate.

US Pat. No. 9,153,387

PHOTOELECTRIC CONVERSION ELEMENT

FUJIKURA LTD., Tokyo (JP...

1. A photoelectric conversion element comprising:
a pair of electrodes that face one another;
a porous oxide semiconductor layer provided on one of the pair of electrodes;
an electrolyte disposed between the pair of electrodes; and
a sealing part that connects the pair of electrodes, and surrounds and seals the porous oxide semiconductor layer and the
electrolyte, wherein

at least a portion of the sealing part is constituted by an inorganic sealing part formed of an inorganic sealing material
and formed on a surface of at least one of the pair of electrodes and a resin sealing part that is connected to the inorganic
sealing part along a direction of connecting the pair of electrodes and formed of a material including a resin, the inorganic
sealing part surrounding the porous oxide semiconductor layer;

the inorganic sealing part comprises a wiring part having
a current collecting wiring constituted by a metal and provided on at least one surface of the pair of electrodes between
the pair of electrodes and

a wiring protective layer constituted by an inorganic protective material and covering the current collecting wiring;
at least a portion of the wiring part constitutes at least a portion of the inorganic sealing part; and
in a portion of the sealing part in which the wiring part constitutes the inorganic sealing part, a region of a surface of
the wiring protective layer facing the electrolyte is covered with a protective resin layer that contacts the electrolyte
and is resistant to the electrolyte, so that the current collecting wiring is prevented from contact with the electrolyte;

wherein the resin sealing part contacts the electrolyte and is bonded to the wiring protective layer; and
wherein the protective resin layer and the resin sealing part are distinct structures.

US Pat. No. 9,795,027

PRINTED WIRING BOARD

FUJIKURA LTD., Tokyo (JP...

1. A printed wiring board comprising:
an insulating substrate;
a first signal line formed on the insulating substrate;
a second signal line having a shorter length than a length of the first signal line; and
a ground layer comprising a first region and a second region, wherein
the first region is defined based on a position of the first signal line and has a first predetermined width,
the second region is defined based on a position of the second signal line and has a second predetermined width,
parts of the ground layer are removed in the first region and the second region, wherein a first ratio of a surface area of
the ground layer remaining in the first region to a total surface area of the first region is lower than a second ratio of
a surface area of the ground layer remaining in the second region to a total surface area of the second region, and

the first predetermined width of the first region is three times or more of a width of the first signal line, the second predetermined
width of the second region being three times or more of a width of the second signal line.

US Pat. No. 9,699,921

MULTI-LAYER WIRING BOARD

FUJIKURA LTD., Tokyo (JP...

1. A multi-layer wiring board comprising: a plurality of wiring bases; and an adhesive layer interposed between the wiring
bases, the respective wiring bases including a wiring pattern on at least one surface thereof and a conductive paste via formed
therein, wherein the multi-layer wiring board includes an electronic component terminal and a board terminal having terminal
pitch different from that of the electronic component terminal, and the multi-layer wiring board has an electronic component
installed thereon and connected to the electronic component terminal, wherein
the plurality of wiring bases include a first wiring base, a second wiring base, a third wiring base, and a fourth wiring
base of similar thicknesses,

the second wiring base includes an opening in which the fourth wiring base is housed, and is disposed, along with the fourth
wiring base housed in the opening, between the first wiring base and the third wiring base, and

the fourth wiring base has a smaller wiring pitch than those of the first wiring base, the second wiring base, and the third
wiring base, is built in to between the first wiring base at a lower portion of an installing portion of the electronic component
and the third wiring base, is connected to the electronic component terminal via the conductive paste via of the first wiring
base, has formed on both surfaces thereof a pattern that enlarges the terminal pitch from the electronic component terminal
to the board terminal, and includes a via that connects the pattern of the both surfaces,

wherein the fourth wiring base includes first electrodes on one surface thereof facing toward the electronic component and
second electrodes on an opposite surface thereof, the respective first electrodes are connected to corresponding one of the
second electrodes, and electrode pitch of the first electrodes is smaller than electrode pitch of the second electrodes.

US Pat. No. 9,667,843

IMAGING MODULE, INSULATING-TUBE-ATTACHED IMAGING MODULE, LENS-ATTACHED IMAGING MODULE, AND ENDOSCOPE

FUJIKURA LTD., Tokyo (JP...

1. An imaging module comprising:
an electrical cable;
a solid-state image sensing device having a light-receiving face perpendicular to an axis direction of a front end of the
electrical cable; and

a three-dimensional wiring base including a molded product extending in the axis direction, the molded product having a surface
on which a wiring is formed, the molded product having a mount surface that is used to package the solid-state image sensing
device thereon and is provided on a front end of the molded product, the three-dimensional wiring base comprising:

a first linear portion that is connected to the mount surface via a first bend portion;
an inclined portion that is connected to the first linear portion via a second bend portion and is inclined with respect to
the first linear portion; and

a second linear portion that is connected to the inclined portion via a third bend portion, the wiring being formed on the
first linear portion, the inclined portion, and the second linear portion, the wiring electrically connecting the electrical
cable and the solid-state image sensing device, wherein

the mount surface has two opposed apexes which sandwich a central portion therebetween and is molded so that a distance between
the two apexes is the longest in distances between two points on sides of the mount surface, a cross section parallel to the
mount surface of the three-dimensional wiring base is equal to the mount surface or smaller than the mount surface, and a
distance between two points that is the longest in distances on sides of a shape in a plan view of the solid-state image sensing
device is equal to or shorter than the distance between the two apexes.

US Pat. No. 9,529,144

MULTICORE FIBER

FUJIKURA LTD., Tokyo (JP...

1. A multicore fiber comprising:
a plurality of cores; and
a cladding enclosing the plurality of the cores, wherein
the plurality of the cores has
two cores or greater forming a first plurality of cores linearly arranged to form a first row on one side based on a plane
passed through a center axis of the cladding, and

three cores or greater forming a second plurality of cores arranged in parallel with the first plurality of the cores to form
a second row on other side based on the plane, and

one of the cores configuring the first plurality of the cores and one of the cores configuring the second plurality of the
cores are disposed on a line orthogonal to the plane,

wherein all of the first plurality of cores and the second plurality of cores have substantially a same relative refractive
index difference to the cladding,

wherein the number of cores adjacent to any given core at an almost same distance is not more than two,
wherein a first core-to-core distance between a first pair of adjacent cores in the first row is different from a second core-to-core
distance between a second pair of adjacent cores in the second row,

wherein all of the first plurality of cores and the second plurality of cores are separated and optically uncoupled from one
another,

wherein an nth core from one end side in the first row is not aligned with an nth core from the same end side in the second row on a line orthogonal to the plane, wherein n is an integer greater than zero.

US Pat. No. 9,478,839

WIRING BOARD

FUJIKURA LTD., Tokyo (JP...

6. A wiring board comprising:
a board;
a first differential transmission line which is constituted by two wirings each having a first end and a second end, the wirings
extending on the board in parallel;

a second differential transmission line which is constituted by two wirings each having a third end and a fourth end, the
wirings extending on the board in parallel;

an insulation resin layer which is formed on part of a face of the board, wherein
the first differential transmission line and the second differential transmission line are arranged so as not be parallel
to each other on the board,

the first ends of the wirings of the first differential transmission line and the third ends of the wirings of the second
differential transmission line are connected to four outside terminal pads, the outside terminal pads being separately disposed
with a pitch p1,

a stepped portion constituted by a lateral face of the insulation resin layer is formed at a boundary between the face of
the board and a top face of the insulation resin layer,

the two wirings of the first differential transmission line and the two wirings of the second differential transmission line
extend from the face of the board to the top face of the insulation resin layer so as to traverse the stepped portion,

the second ends of the wirings of the first differential transmission line and the fourth ends of the wirings of the second
differential transmission line are connected to four inside terminal pads on the insulation resin layer, the inside terminal
pads being separately disposed with a pitch p2, the pitch p2 being greater than the pitch p1, and

the extending direction of the wirings of the first differential transmission line and the wirings of the second differential
transmission line which are traversing the stepped portion and the direction of a periphery are perpendicular to each other
in a plan view of the board, the periphery being defined by a boundary between the top face of the insulation resin layer
and the lateral face of the insulation resin layer constituting the stepped portion.

US Pat. No. 9,453,978

OPTICAL MODULE

FUJIKURA LTD., Tokyo (JP...

1. A positioning method for positioning a first member that has a positioning hole and a second member that has a positioning
pin having a tapered surface, said method comprising:
positioning said first member and said second member with respect to one another by inserting said positioning pin into said
positioning hole;

wherein said second member has a recess formed around the base of said positioning pin, and said recess is recessed from a
surface of said second member opposing said first member;

said positioning hole of said first member is a non-through hole that narrows toward the inside thereof; and
said positioning hole is formed by blasting.

US Pat. No. 9,606,307

OPTICAL MODULE

FUJIKURA LTD., Tokyo (JP...

1. An optical module, comprising:
a glass substrate
that includes an optical-electric-conversion element,
that is transparent to either one of light emitted from the optical-electric-conversion element and light received by the
optical-electric-conversion element, and

in which a locating hole is formed; and
an optical component in which a locating pin is formed,
wherein the locating pin has a tapered surface and is fitted to the locating hole through a protective film,
a recess is formed around a root of the locating pin in the optical component,
the glass substrate and the optical component being positioned by fitting the locating pin to the locating hole through a
protective film so that the protective film is in contact with an edge of the locating hole and the tapered surface of the
locating pin, and

the protective film is formed beforehand on the edge of the locating hole of the glass substrate, the protective film formed
on the surface of the glass substrate being placed between the glass substrate and the recess of the optical component, and
a part of the protective film being formed on the surface of the glass substrate.

US Pat. No. 9,560,770

COMPONENT BUILT-IN BOARD AND METHOD OF MANUFACTURING THE SAME, AND MOUNTING BODY

FUJIKURA LTD., Tokyo (JP...

1. A component built-in board of multi-layer structure that has a plurality of unit boards stacked therein and is configured
having a plurality of electronic components built in thereto in a stacking direction, wherein
the plurality of unit boards include:
an upper double-sided board and a lower double-sided board, each including:
a first insulating layer,
a first wiring layer formed on both surfaces of the first insulating layer,
a first interlayer conductive layer that penetrates the first insulating layer and is connected to the first wiring layer,
and

an opening in which the electronic component is housed,
wherein the first wiring layer includes a front first wiring layer disposed on a front surface of the first insulating layer
and a back first wiring layer disposed on a back surface of the first insulating layer, the back surface of the first insulating
layer being positioned opposite to the front surface of the first insulating layer in the stacking direction, and wherein
the first interlayer conductive layer connects the front first wiring layer to the back first wiring layer; and

an intermediate board that includes a second insulating layer, a first adhesive layer provided on both surfaces of the second
insulating layer, and a second interlayer conductive layer that penetrates the second insulating layer along with the first
adhesive layer, wherein the first adhesive layer includes a front first adhesive layer disposed on a front surface of the
second insulating layer and a back first adhesive layer disposed on a back surface of the second insulating layer, the back
surface of the second insulating layer being positioned opposite to the front surface of the second insulating layer in the
stacking direction,

wherein the upper double-sided board is disposed above the intermediate board and the lower double-sided board is disposed
below the intermediate board.

US Pat. No. 9,515,450

AMPLIFYING OPTICAL FIBER AND OPTICAL AMPLIFIER

FUJIKURA LTD., Tokyo (JP...

1. An amplifying optical fiber comprising:
a plurality of cores to which an active element is doped;
a first cladding enclosing the plurality of cores with no gap; and
a second cladding enclosing the first cladding, wherein:
the plurality of cores is disposed around a center axis of the first cladding in a state in which an inter-core distance between
cores adjacent to each other is equal;

a refractive index of the core is provided higher than a refractive index of the first cladding;
the refractive index of the first cladding is provided higher than a refractive index of the second cladding; and
an expression below is satisfied:
5.8??/MFD(2?c/(?c+?op))?8

where the inter-core distance is defined as ?, a mode field diameter of the core is defined as MFD, a cutoff wavelength is
defined as ?c, and a wavelength of communication light incident on the core is defined as ?op.

US Pat. No. 9,509,057

ANTENNA

FUJIKURA LTD., Tokyo (JP...

1. An antenna comprising:
a dielectric substrate;
an antenna conductor on a front surface of the dielectric substrate, the antenna conductor being a comb-line antenna conductor
including a power feed line and stubs;

a ground conductor on a back surface of the dielectric substrate, the ground conductor including an opening in a region facing
an input end of the power feed line;

a waveguide tube joined to the back surface of the dielectric substrate, the waveguide tube having (i) a tube axis orthogonal
to the back surface of the dielectric substrate and (ii) a tube wall whose edge surface surrounds the opening;

a shield on the front surface of the dielectric substrate, the shield having a cut into which the input end of the power feed
line is inserted; and

short-circuit portions each short-circuiting the ground conductor and the shield, the short-circuit portions each penetrating
the dielectric substrate,

the short-circuit portions being provided along a whole periphery of the shield except for a portion provided with the cut,
the cut having a reverse-taper shape whose width becomes greater from an open end of the cut to an inward end of the cut,
wherein:

each of the stubs extends in a direction orthogonal to the power feed line; and
each of the stubs is provided, at a root, with a slit extending in a direction from an output-end side of the power feed line
toward an input-end side of the power feed line.

US Pat. No. 9,488,606

METHOD FOR DETECTING NON-SUPERCONDUCTING TRANSITION OF SUPERCONDUCTING WIRE

FUJIKURA LTD., Tokyo (JP...

1. A method for detecting a non-superconducting transition of a superconducting wire comprising a substrate, a superconducting
layer that has a critical temperature of 77 K or more, and a metal stabilization layer, the method comprising:
adhesively attaching an optical fiber in which a plurality of fiber Bragg gratings are formed in a core along a longitudinal
direction thereof to the superconducting wire;

concentrically winding the superconducting wire adhesively attached with the optical fiber in which the fiber Bragg gratings
are formed;

fixing the wound superconducting wire in a coil shape;
after the fixing, measuring in advance a Bragg wavelength shift of the fiber Bragg gratings with respect to a temperature
variation of the superconducting wire, and determining a relational expression based on the Bragg wavelength shift for a temperature
calculation of the superconducting wire;

measuring the temperature variation of the fiber Bragg gratings continuously from before to after the non-superconducting
transition occurs in the superconducting wire;

determining temperature variations of the plurality of fiber Bragg gratings before and after the non-superconducting transition
of the superconducting wire using the relational expression; and

calculating a propagation rate of the non-superconducting transition based on both a time difference of temperature increases
of the plurality of fiber Bragg gratings, and an interval between each of the fiber Bragg gratings.

US Pat. No. 9,418,776

OXIDE SUPERCONDUCTOR WIRE AND SUPERCONDUCTING COIL

FUJIKURA LTD., Tokyo (JP...

1. An oxide superconductor wire comprising:
a superconductor laminate that comprises a substrate which is formed in a tape shape and an intermediate layer, an oxide superconductor
layer, and a metal stabilizing layer which are laminated on the substrate; and

an insulating coating layer that covers an entire outside surface of the superconductor laminate, wherein
both an entire outside surface and an entire inside surface of the insulating coating layer are coated with a coating layer
formed of a fluororesin, the coating layer being arranged between the superconductor laminate and the insulating coating layer
and contacting both the superconductor laminate and the insulating coating layer, the fluororesin being one of polytetrafluoroethylene,
tetrafluoroethylene-hexafluoropropylene copolymer, perfluoroalkoxy fluororesin, and ethylene-tetrafluoroethylene copolymer.

US Pat. No. 9,417,391

OPTICAL COMBINER AND LASER DEVICE USING THE SAME

FUJIKURA LTD., Tokyo (JP...

1. An optical combiner comprising:
a plurality of input optical fibers;
an output optical fiber; and
a bridge fiber disposed between the plurality of input optical fibers and the output optical fiber and optically coupled to
the plurality of input optical fibers and the output optical fiber, wherein

the bridge fiber includes an input end face coupled to the plurality of input optical fibers, and an emission end face opposite
to the input end face and coupled to the output optical fiber,

the bridge fiber includes a tapered portion whose outer diameter is reduced toward the emission end face of the bridge fiber,
the output optical fiber includes an incident end face connected to the emission end face of the bridge fiber, and
an outer diameter of the emission end face of the bridge fiber is smaller than a cladding outer diameter of the incident end
face of the output optical fiber such that the boundary between the bridge fiber and the output optical fiber includes a step
projecting radially,

wherein
the bridge fiber includes a plurality of bridge fibers optically coupled to each other, the plurality of bridge fibers including
a first bridge fiber and a second bridge fiber disposed next to each other in an axial direction of the bridge fiber,

the first bridge fiber includes a first input end face coupled to the plurality of input optical fibers, and a first emission
end face opposite to the first input end face,

the second bridge fiber includes a second input end face coupled to the first emission end face of the first bridge fiber,
and a second emission end face opposite to the second input end face and coupled to the output optical fiber, and

an outer diameter of the second input end face of the second bridge fiber is larger than an outer diameter of the first emission
end face of the first bridge fiber such that the boundary between the first bridge fiber and the second bridge fiber includes
a step projecting radially.

US Pat. No. 9,356,417

FIBER LASER

FUJIKURA LTD., Tokyo (JP...

1. A fiber laser comprising:
an amplification optical fiber including a core doped with an active element and a cladding surrounding an outer circumferential
surface of the core;

a pumping light source configured to emit pumping light to pump the active element of the amplification optical fiber;
a first mirror provided on one side of the amplification optical fiber and configured to reflect light having at least a part
of a wavelength of light emitted from the active element pumped by the pumping light; and

a second mirror provided on the other side of the amplification optical fiber and configured to reflect light having at least
a part of the wavelength of the light reflected off the first mirror at a reflectance lower than in the first mirror,

wherein a gain of light in all wavelength range longer than the wavelength of the light reflected off the first mirror and
the second mirror is a gain of 35 dB or less in the amplification optical fiber.

US Pat. No. 9,541,706

MECHANICAL SPLICE UNIT, MECHANICAL SPLICING TOOL, AND OPTICAL FIBER SPLICING METHOD

FUJIKURA LTD., Tokyo (JP...

1. A mechanical splice unit comprising:
a cable grasping member that grasps an optical fiber cable;
a mechanical splice having an optical fiber guide groove that is formed at matching surfaces of both a base and a lid in a
two-part-divided structure, the mechanical splice being capable of grasping an extended optical fiber at one end side of the
lid, the extended optical fiber being drawn from a terminal of the optical fiber cable;

a grasping member holding portion that movably holds the cable grasping member along a longitudinal direction of the mechanical
splice;

a first splicing tool comprising a first wedge that allows one end side of the lid of the mechanical splice to be in an opened
state;

a second splicing tool comprising a second wedge that allows the other end of the lid of the mechanical splice to be in an
opened state; and

an optical fiber splice auxiliary tool used for splice of the extended optical fiber that is grasped by the mechanical splice,
wherein

the optical fiber splice auxiliary tool includes:
a mechanical splice grasping portion that holds the mechanical splice; and
a guided portion that is slidable along a guide portion formed at a splicing tool to which an inserted optical fiber to be
spliced to the extended optical fiber is fixed, and wherein

the first splicing tool comprises a spacer that stops movement of the cable grasping member of the mechanical splice along
the longitudinal direction thereof by a predetermined distance with respect to the mechanical splice;

a front-end portion of the extended optical fiber is sandwiched between the base and the lid so as to be grasped and fixed
therebetween by removing the first wedge from between the base and the lid of the mechanical splice; and

the mechanical splice unit is capable of forming flexural deformation at the extended optical fiber between the cable grasping
member and one end side of the mechanical splice in the longitudinal direction thereof as a result of causing the cable grasping
member to further come close to one end side of the mechanical splice in the longitudinal direction thereof.

US Pat. No. 9,513,439

OPTICAL FIBER FUSION SPLICER AND OPTICAL FIBER FUSION SPLICING APPARATUS PROVIDED WITH SAME

FUJIKURA LTD., Tokyo (JP...

1. An optical fiber fusion splicer which aligns tips of a pair of optical fibers and butts the tips each other, and fusion-splices
core wires of the pair of optical fibers by discharge heating, comprising:
a pair of right and left V-grooved stands comprising V-grooves for butting the tips of the pair of optical fibers each other
while positioning the tips of the pair of optical fibers;

a pair of elastic members respectively supporting the pair of V-grooved stands, each of the elastic members comprising two
elastically deformable plate-shaped members provided parallel to each other;

a fixed base on which the pair of elastic members is mounted, whereby the pair of V-grooved stands is fixed thereto through
the pair of elastic members, and which is long in a right-left direction; and

a pair of micrometers aligning the tips of the pair of optical fibers by finely moving the pair of V-grooved stands with respect
to each other while elastically deforming the pair of elastic members by pressing the pair of V-grooved stands from forward
and backward directions, wherein:

the pair of elastic members is provided so as to extend upward from fixing base portions of the fixed base while being respectively
inclined in the forward and backward directions, and is disposed at positions shifted in the right-left direction of the fixed
base;

the pair of V-grooved stands is disposed such that the V-grooves provided therein communicate with each other; and
when viewed from the right and left end portions of the fixed base, a distance L1 between first end portions of the pair of elastic members fixed to the fixing base portions is narrower than a distance L2 between second end portions of the pair of elastic members on which the pair of V-grooved stands is mounted.

US Pat. No. 9,807,870

PRINTED WIRING BOARD

FUJIKURA LTD., Tokyo (JP...

1. A printed wiring board comprising:
a first insulating substrate composed of a liquid crystal polymer;
a first signal line formed on one main surface of the first insulating substrate;
a second insulating substrate composed of a liquid crystal polymer;
a second signal line, which is offset from the first signal line, formed on one main surface of the second insulating substrate
and along an extending direction of the first signal line; and

an adhesion layer composed of a modified polyphenylene ether for adhesion between the one main surface of the first insulating
substrate and the one main surface of the second insulating substrate,

wherein, when frequencies of signals transmitted by the first signal line and the second signal line are 2.5 GHz or more and
5.0 GHz or less, an offset amount is greater than a circuit width of the first signal line and the offset amount is 130 ?m
or more and 300 ?m or less, wherein the offset amount is a distance between a position of one end of the first signal line
farthest from the second signal line along a width direction of the first signal line and a position of one end of the second
signal line nearest to the first signal line along a width direction of the second signal line.

US Pat. No. 9,638,881

APPARATUS HAVING HOUSING IN WHICH OPTICAL FIBER IS PROVIDED, SUPPORTING MEMBER, AND SUPPORTING METHOD

FUJIKURA LTD., Tokyo (JP...

1. An apparatus comprising:
a housing comprising a port to which an optical fiber is to be connected;
a substrate on which an optical module is provided in the housing;
an optical fiber via which the port is optically connected with the optical module;
a feed opening via which wind is introduced into the housing; and
a supporting member for supporting the optical fiber in the housing,
wherein:
the port is provided in a lateral wall of the housing,
the supporting member comprises a shielding wall which is provided windward of the optical fiber so as to block wind blowing
toward the optical fiber,

the supporting member comprises a first supporting section for supporting the optical fiber at a location higher than the
optical module, the first supporting section comprising a supporting surface which (i) supports the optical fiber in the vicinity
of the port and (ii) is located at a height at which the port is provided, wherein the height is measured from a bottom plate
of the housing, and

the supporting member comprising a second supporting section which is provided between the first supporting section and the
optical module and constitutes a curved surface.

US Pat. No. 9,673,545

PRINTED WIRING BOARD AND CONNECTOR CONNECTING THE WIRING BOARD

FUJIKURA LTD., Tokyo (JP...

1. A printed wiring board comprising:
a base substrate;
a plurality of pads for electrical connection that are disposed at one surface side of the base substrate and at a connection
end portion to be connected with a connector;

other surface side wirings that are disposed at the other surface side of the base substrate and connected with at least some
of the plurality of pads via vias penetrating the base substrate;

an engageable part that is formed at the connection end portion and is to be engaged with an engagement part of the connector
in a direction of disconnection; and

a first reinforcement layer that is disposed at the other surface side of the base substrate and at a frontward side with
respect to the engageable part when viewed in a direction of connection with the connector, and that is formed separately
from the other surface side wirings.

US Pat. No. 9,567,253

METHOD OF MANUFACTURING OPTICAL FIBER AND APPARATUS OF MANUFACTURING THE SAME

FUJIKURA LTD., Tokyo (JP...

1. A method of manufacturing an optical fiber, comprising:
drawing an optical fiber preform and forming a bare optical fiber;
disposing a coating layer formed of a resin on an outer circumference of the bare optical fiber; and
curing the coating layer and obtaining an optical fiber,
wherein a direction of the bare optical fiber is changed by a direction changer in any position from drawing the optical fiber
to disposing the coating layer,

the direction changer includes a guide groove which guides the bare optical fiber,
a blowout port of a fluid which floats the bare optical fiber wired along the guide groove is formed along the guide groove
in the guide groove, and

an average flow rate or a highest flow rate in an inlet wire portion of the bare optical fiber to the guide groove and an
outlet wire portion from the guide groove is faster than a lowest flow rate of the fluid in an intermediate portion between
the inlet wire portion and the outlet wire portion in a flow rate of the fluid from the blowout port.

US Pat. No. 9,529,146

MULTICORE FIBER AND METHOD OF MANUFACTURE OF THE SAME

FUJIKURA LTD., Tokyo (JP...

9. A method of manufacture of a multicore fiber comprising:
boring a plurality of through holes in a cladding rod so that the through holes along a longitudinal direction of the cladding
rod are arranged and disposed on a linear line passed through a center of the cladding rod;

inserting a core enclosed rod that a core rod is enclosed with a glass layer individually into the plurality of the through
holes;

heating the cladding rod and the core enclosed rod and integrally forming the cladding rod with the core enclosed rod; and
drawing the rods integrally formed in the heating, wherein
the plurality of the through holes includes a pair of outer through holes located at outermost positions and one or more of
inner through holes sandwiched between the pair of the through holes,

the core rod in the core enclosed rod inserted into the outer through hole in the inserting includes a diameter in a first
direction, in which the plurality of the through holes is arranged, almost same as a diameter in a second direction orthogonal
to the first direction, and

the core rod in the core enclosed rod inserted into the inner through hole in the inserting includes a diameter in the first
direction smaller than a diameter in the second direction.

US Pat. No. 9,411,101

OPTICAL FIBER CONNECTOR, OPTICAL FIBER CONNECTOR ASSEMBLING METHOD, OPTICAL FIBER CONNECTOR ASSEMBLING TOOL, AND OPTICAL FIBER CONNECTOR ASSEMBLING SET

FUJIKURA LTD., Tokyo (JP...

1. An optical fiber connector comprising:
a ferrule;
an inserted optical fiber of which one end portion is fixed to the ferrule and of which the other end portion protrudes from
the ferrule;

an external optical fiber of which a front end portion is fusion-spliced to the other end portion of the inserted optical
fiber;

one or more reinforcing members configured to reinforce the fusion-spliced portion of the other end portion of the inserted
optical fiber and the front end portion of the external optical fiber; and

a ferrule boot which covers the surrounding of the other end portion of the inserted optical fiber, the ferrule boot being
attached to the ferrule, wherein

the one or more reinforcing members further secure the ferrule boot to the ferrule, and
the ferrule comprises a lens located on an extension line of the inserted optical fiber.

US Pat. No. 9,733,424

MULTICORE FIBER AND METHOD OF MANUFACTURING THE SAME

FUJIKURA LTD., Tokyo (JP...

1. A multicore fiber comprising:
a plurality of cores; and
a cladding enclosing the plurality of the cores, wherein
an external form of the cladding in a cross section is formed of an arc portion that is formed in an arc shape relative to
a center axis of the cladding and a non-arc portion that is not formed in an arc shape and pinched between both ends of the
arc portion relative to the center axis of the cladding, and

the non-arc portion is formed with a pair of projections projecting from the both ends of the arc portion on an opposite side
of the center axis relative to a straight line connecting the both ends of the arc portion and one or more of recesses pinched
between the pair of the projections,

wherein an intermediate projection is formed between the pair of the projections, the intermediate projection projecting on
an opposite side of the center axis relative to a straight line connecting tip ends of the pair of the projections.

US Pat. No. 9,733,433

OPTICAL CONNECTION BOX

FUJIKURA LTD., Tokyo (JP...

1. An optical connection box that connects a plurality of second optical paths to a plurality of first optical paths, the
optical connection box comprising:
a plurality of first optical connector plugs, each first optical connector plug being connected to a corresponding one of
the first optical paths;

a plurality of second optical connector plugs, each second optical connector plug being connected to a corresponding one of
the second optical paths;

a movable holding body that collectively holds the plurality of second optical connector plugs;
a plurality of relay optical fibers in which any one of the plurality of first optical connector plugs is disposed in a one-side
first terminal and any one of the plurality of second optical connectors is disposed in an other-side terminal; and

an exterior body in which the plurality of first optical connector plugs, the plurality of second optical connector plugs,
the movable holding body, and the plurality of relay optical fibers are disposed,

wherein each of the plurality of second optical connector plugs is removably connected to each of a plurality of receptacle
optical connector plugs disposed in each terminal of the plurality of second optical paths,

wherein the movable holding body is configured to be movable in directions toward and away from the plurality of receptacle
optical connectors while collectively holding the plurality of second optical connector plugs, and is configured to be movable
so as to be either inserted or removed from a second unit,

wherein the movable holding body comprises a movable holding body positioning portion which performs positioning with respect
to the second unit in which the receptacle optical connectors are disposed,

wherein the movable holding body is configured to be positioned by the movable holding body positioning portion so that each
of the plurality of second optical connector plugs is arranged at a position of a corresponding receptacle optical connector,
and

wherein each of the plurality of second optical connector plugs held by the movable holding body is configured to be movable
by an operation of an operation body disposed in an optical connector main body, so as to be either inserted or removed from
the corresponding receptacle optical connector.

US Pat. No. 9,630,525

SEAT DEVICE

FUJIKURA LTD., Tokyo (JP...

1. A seat device comprising:
a cushion pad;
a support member for supporting the cushion pad;
a pressure sensitive switch disposed with a spacing from an under face of the cushion pad; and
a pressing member disposed below the cushion pad, the pressing member being deformed by a pressure applied from the under
face of the cushion pad to press the pressure sensitive switch, wherein

a deformed amount of a part of the pressing member per unit displacement amount in which the under face of the cushion pad
is displaced downwardly is greater in a second stage after the pressure sensitive switch is turned on than in a first stage
before the pressure sensitive switch is turned on,

wherein the pressing member has a first flexible portion and a second flexible portion joined to the first flexible portion,
and

the second flexible portion is bent after a bending amount of the first flexible portion exceeds a predetermined amount.

US Pat. No. 9,612,399

METHOD FOR MANUFACTURING OPTICAL FIBER COMBINER, OPTICAL FIBER COMBINER, AND LASER DEVICE

FUJIKURA LTD., Tokyo (JP...

1. A method for manufacturing an optical fiber combiner, the method comprising:
a first fusion splicing process of fusion-splicing a first longitudinal end face of one input optical fiber of a plurality
of input optical fibers to a first longitudinal end face of corresponding one glass member of a plurality of glass members,
each of the input optical fibers having a core and a cladding surrounding the core, the respective glass members having an
outer diameter greater than a diameter of the core and smaller than an outer diameter of the cladding;

a bundle process of bundling the cladding of an end portion at least on the first end face side of the plurality of the input
optical fibers after the first fusion splicing process, with adjacent side surfaces of the claddings being in contact with
each other; and

a second fusion splicing process of fusion-splicing a second longitudinal end face of the each glass member to a first end
face of a bridge fiber while separating the glass members from each other in a direction perpendicular to an axial direction
of the input optical fibers, the second longitudinal end face being opposite to the first longitudinal end face of the glass
member.

US Pat. No. 9,557,482

HIGH-ORDER POLARIZATION CONVERSION DEVICE, OPTICAL WAVEGUIDE DEVICE, AND DP-QPSK MODULATOR

FUJIKURA LTD., Tokyo (JP...

1. A high-order polarization conversion device configured of a planar optical waveguide, comprising:
a substrate;
a lower clad disposed on the substrate;
a core comprising a lower core and an upper core, the lower core being disposed on the lower clad and having a fixed height
in a rectangular sectional shape, the upper core being formed of the same material as the lower core and having a fixed height
in a rectangular sectional shape that is disposed continuously on the lower core; and

an upper clad that is disposed on the core and the lower clad and is formed of the same material as the lower clad, wherein
the core forms an optical waveguide through which light is configured to be guided from a start portion, at which a width
of the lower core and a width of the upper core are the same, to an end portion, at which the width of the lower core and
the width of the upper core are the same,

at the start portion and the end portion, both ends of the upper core in a width direction overlap both ends of the lower
core in the width direction, and a section of the core is rectangular shaped,

at least one of the width of the upper core and the width of the lower core continuously decreases in a guiding direction
of the light between the start portion and the end portion, and neither of the width of the upper core nor the width of the
lower core is increased from the start portion to the end portion,

at the start portion, an effective refractive index of TE0 is larger than an effective refractive index of TE1, and the effective refractive index of the TE1 is larger than an effective refractive index of TM0,

at the end portion of the optical waveguide, the effective refractive index of the TE0 is larger than the effective refractive index of the TM0, and the effective refractive index of the TM0 is larger than the effective refractive index of the TE1,

in a portion of the optical waveguide between the start portion and the end portion excluding the start portion and the end
portion, the core has a vertically asymmetric structure in which the width of the upper core and the width of the lower core
are different, and

the high-order polarization conversion device performs high-order polarization conversion between TE1 of the start portion and TM0 of the end portion.

US Pat. No. 9,531,127

POWER FEED CONNECTOR

FUJIKURA LTD., Tokyo (JP...

1. A power feed connector which is connected to a power receiving connector of an electromotive machine and supplies electric
power to the electromotive machine, the power feed connector comprising:
a tubular case that is formed to have a tubular shape and has a front end opening portion being open at a front end in a central
axis direction thereof;

a connector main body that is accommodated inside the tubular case and is slidable in the central axis direction of the tubular
case;

an operation lever portion that is turnably and axially supported by the tubular case;
a link mechanism that is directly connected to the connector main body and the operation lever portion and converts a turning
motion of the operation lever portion into a linear motion of the connector main body in the central axis direction; and

a grip portion that is integrally provided with the tubular case and extends in a direction intersecting the central axis
direction,

wherein a first end of the operation lever portion is disposed inside the tubular case,
a second end of the operation lever portion protrudes outward through the open hole formed at a rear end of the tubular case,
is disposed in the rear end portion of the tubular case regardless of a turning position of the operation lever portion, and
is positioned on an inner side from both end portions of the tubular case in a width direction, the width direction being
a direction orthogonal to the central axis direction of the tubular case and the extending direction of the grip portion,

the first end of the operation lever portion is axially supported by the tubular case,
an intermediate portion of the operation lever portion is joined to the connector main body through the link mechanism, and
the operation lever portion is formed in a bent manner such that the second end is positioned on a rear side from the intermediate
portion regardless of the turning position of the operation lever portion.

US Pat. No. 9,416,043

APPARATUS AND METHOD FOR MANUFACTURING GLASS PREFORM

FUJIKURA LTD., Tokyo (JP...

1. A method for manufacturing a glass preform, the method comprising:
preparing a dummy tube section and a glass tube section, the dummy tube section having a first end and a second end opposite
to the first end, the glass tube section having an inner wall and being provided at the second end of the dummy tube section;

arranging an alkali metal compound or an alkaline earth metal compound in the dummy tube section;
heating and vaporizing the alkali metal compound or the alkaline earth metal compound at a predetermined temperature using
a first heat source;

allowing a dry gas containing oxygen to flow into the dummy tube section from the first end of the dummy tube section;
cooling and condensing vapor of the alkali metal compound or the alkaline earth metal compound with movement of the dry gas
in the dummy tube section, and thereby generating particles of the alkali metal compound or the alkaline earth metal compound;

heating the particles of the alkali metal compound or the alkaline earth metal compound carried to the glass tube section
with the movement of the dry gas by use of a second heat source which performs traverse; and

making oxides of the alkali metal compound or the alkaline earth metal compound be deposited on the inner wall of the glass
tube section and dispersed inside the glass tube section.