US Pat. No. 9,572,283

THERMALLY CONDUCTIVE FLEXIBLE MEMBER FOR HEAT TRANSFER

FINISAR CORPORATION, Sun...

1. A thermal conduction system for thermal energy dissipation, the thermal conduction system comprising:
a thermally conductive flexible member that contacts an optical subassembly that is positioned in a shell of a communication
module and that contacts the shell such that the thermal energy generated by operation of the optical subassembly transfers
from the optical subassembly to the shell;

thermally conductive flexible member holes that are defined by the thermally conductive flexible member, the thermally conductive
flexible member holes corresponding to pins that extend from the optical subassembly such that the pins pass through the thermally
conductive flexible member holes and enable the thermally conductive flexible member to contact an exterior header surface
of a header of the optical subassembly; and

a gasket that defines gasket holes, the gasket holes corresponding to the thermally conductive flexible member holes and to
flexible circuit holes of a flexible circuit, the gasket configured to be positioned between the thermally conductive flexible
member and the flexible circuit to reduce electrical conduction between the thermally conductive flexible member and the flexible
circuit.

US Pat. No. 9,526,185

HYBRID PCB WITH MULTI-UNREINFORCED LAMINATE

FINISAR CORPORATION, Sun...

1. A hybrid printed circuit board comprising:
a top layer;
a bottom layer;
a plurality of internal layers stacked up between the top layer and the bottom layer, the plurality of internal layers including
a first internal layer below the top layer and a second internal layer above the bottom layer;

first unreinforced laminate placed between the top layer and the first internal layer;
second unreinforced laminate placed between the second internal layer and the bottom layer;
third laminate placed between adjacent internal layers of the plurality of internal layers; and
traces on at least one of a top side or a bottom side of the hybrid printed circuit board, wherein the traces each have a
width less than 75 micrometers.

US Pat. No. 9,065,707

POLARIZATION-INDEPENDENT LCOS DEVICE

Finisar Corporation, Hor...

1. An optical phase modulator including:
a liquid crystal element; and
a pair of opposing electrodes disposed around said liquid crystal element for supplying an electric potential across said
liquid crystal element to drive liquid crystals in a predetermined configuration;

wherein a first said electrode includes a plurality of individually addressable pixels and at least a subset of said addressable
pixels include an anisotropic material profile in orthogonal lateral dimensions such that incident light transmitted through
said liquid crystal element and onto said first electrode is reflected and experiences a relative phase difference between
its constituent orthogonal polarization components;

wherein each said addressable pixel of said subset includes a reflective sub-wavelength grating structure, said grating structure
having a periodic profile in at least a first lateral dimension; and

wherein an optical slow axis of said liquid crystal element is oriented at an angle of about 45° to said first lateral dimension
of said grating structure.

US Pat. No. 9,654,226

METHOD AND APPARATUS FOR CHARACTERIZATION AND COMPENSATION OF OPTICAL IMPAIRMENTS IN INP-BASED OPTICAL TRANSMITTER

Finisar Corporation, Hor...

1. A method for characterizing and compensating for optical impairments in an optical transmitter, the method comprising:
a) operating an optical transmitter comprising a first parent Mach-Zehnder (MZ) modulator and a second parent MZ modulator,
wherein each of the first and second parent MZ modulators comprises a plurality of child MZ modulators;

b) biasing each of the plurality of child MZ modulators in the first and second parent MZ modulators at respective initial
operating points;

c) generating an electro-optic RF transfer function for each of the plurality of child MZ modulators by measuring a plurality
of optical output powers of the optical transmitter while sweeping characterizing RF input drive power levels applied to each
of the plurality of child MZ modulators;

d) determining curve fitting parameters for each of the plurality of electro-optic RF transfer functions;
e) determining operating points of each of the plurality of child MZ modulators using the curve fitting parameters;
f) determining an IQ power imbalance at a particular operating point for each of the first and the second parent MZ modulators
using the curve fitting parameters for each of the plurality of electro-optic RF transfer functions;

g) determining initial RF input drive power levels applied to each of the plurality of child MZ modulators that compensate
for the determined IQ power imbalance for each of the first and the second parent MZ modulators;

h) determining XY power imbalance of the optical transmitter at the determined initial RF input drive power levels using the
curve fitting parameters; and

i) determining operating RF input drive power levels that at least partially compensate for the first and second IQ power
imbalances and for the XY power imbalance of the optical transmitter.

US Pat. No. 9,154,124

ELECTROMAGNETIC RADIATION DISSIPATING DEVICES

FINISAR CORPORATION, Sun...

1. An electrical circuit, comprising:
an electromagnetic radiation (“EMR”) source configured to generate an output signal at an operating bit rate, wherein the
output signal includes an EMR component;

an EMR dissipating device electrically coupled to the EMR source, the EMR dissipating device includes a filter circuit electrically
coupled to the EMR source, the filter circuit is configured to filter a portion of the EMR component of the output signal
based on a resonance frequency of the filter circuit; and

an output terminal configured to output the output signal after the output signal is filtered by the filter circuit,
wherein the filter circuit includes:
a capacitor circuit that includes a first capacitor terminal and a second capacitor terminal, the first capacitor terminal
is coupled to the output terminal;

an inductor circuit that includes a first inductor terminal and a second inductor terminal, the first inductor terminal is
coupled to the second capacitor terminal;

a varactor circuit that includes a first varactor terminal and a second varactor terminal, the first varactor terminal is
coupled to the second inductor terminal; and

a transistor circuit that includes a first transistor terminal, a second transistor terminal, and a third transistor terminal,
the first transistor terminal is coupled to the second varactor terminal and the second transistor terminal is coupled to
ground,

wherein
a first control voltage, applied to the third transistor terminal, varies a resistance of the filter circuit to adjust a Q
factor and electrical damping behavior of the filter circuit, and

a second control voltage, applied to the first varactor terminal and the second inductor terminal, varies a capacitance of
the filter circuit to thereby adjust the resonance frequency of the filter circuit.

US Pat. No. 9,148,286

PROTECTING AGAINST COUNTERFEIT ELECTRONIC DEVICES

FINISAR CORPORATION, Sun...

1. A method of authenticating a second device connected to a first device, the method comprising:
transmitting a first data string from the first device to the second device, the first device including a first encryption
key provided to the first device at manufacture of the first device and the second device including a second encryption key
provided to the second device at manufacture of the second device, wherein one of the first device and the second device is
a first host device and the other one of the first device and the second device is a first optical transceiver having a first
edge connector through which the first optical transceiver transmits data to the first host device and through which the first
optical transceiver receives data from the first host device;

generating, at the second device, a second data string by applying the second encryption key to the first data string such
that the second data string is a first encrypted copy of the first data string;

transmitting the second data string from the second device to the first device;
receiving the second data string at the first device from the second device;
generating, at the first device, a third data string by applying the first encryption key to the first data string such that
the third data string is a second encrypted copy of the first data string;

comparing, at the first device, the third data string and the second data string;
authenticating the second device as an authentic device from a reliable manufacturer when the third data string and the second
data string match; and

withholding power from the first optical transceiver by the first host device not transmitting power to the first optical
transceiver through the first edge connector to prevent the first optical transceiver from functioning while maintaining power
to the first host device when the second device is not authenticated.

US Pat. No. 9,128,260

CONSTRAINING BALL LENS IN AN OPTICAL SUBASSEMBLY

FINISAR CORPORATION, Sun...

1. An optical subassembly, comprising:
a housing including:
a fiber receptacle formed in a first end of the housing;
a second receptacle formed in a second end of the housing opposite the first end, the fiber receptacle and second receptacle
defining a cavity through the housing; and

a ball lens constraint integrally formed in the housing at an intersection of the fiber receptacle with the second receptacle,
the ball lens constraint defining a substantially circular aperture having a first diameter;

a ball lens having a second diameter that is larger than the first diameter, the ball lens being disposed mostly within the
second receptacle with a portion of the ball lens extending through the substantially circular aperture into the fiber receptacle;
and

a constraining insert disposed within the second receptacle, the constraining insert including one or more resilient elements
configured to bias the ball lens against the ball lens constraint, the constraining insert further including a substantially
cylindrical wall including a base from which the one or more resilient elements radially extend inward and an end opposite
the base, wherein:

the second receptacle includes a step that cooperates with the end of the substantially cylindrical wall of the constraining
insert to form a channel encircling the constraining insert near the end of the substantially cylindrical wall; and

the optical subassembly further includes an epoxy disposed within the channel.

US Pat. No. 9,134,492

CABLE CLIP AND CABLE MANAGEMENT STRUCTURES FOR USE WITH AN OPTOELECTRONIC MODULE

FINISAR CORPORATION, Sun...

1. A cable clip configured to maintain engagement of an optical interface with a lens assembly included in an optoelectronic
module, the cable clip comprising:
a clip shoulder;
a clip body;
a forward section that is attached to the clip body at the clip shoulder and that includes a first end opposite the clip shoulder,
the forward section extending substantially in a first direction from the clip body such that the forward section extends
along at least a portion of a top, external surface of the lens assembly when a portion of optical interface is received in
the lens assembly;

a connector retention mechanism that is configured to retain the optical interface, wherein the connector retention mechanism
extends from the clip body;

a lens latch positioned at the first end, wherein the lens latch is configured to apply a latching force to a front, external
surface of the lens assembly to latch the lens assembly against the optical interface when the portion of the optical interface
is received within the lens assembly; and

a release lever that is connected to the forward section, wherein the release lever is configured to unlatch the lens latch
from the lens assembly in response to application of an actuation force in a second direction that flexes the forward section
relative to the connector retention mechanism and displaces the lens latch relative to the lens assembly in a third direction,
which is substantially opposite the second direction.

US Pat. No. 9,140,866

OPTICAL COMPONENT ARRAYS IN OPTICAL CONNECTORS

FINISAR CORPORATION, Sun...

1. An optical connector comprising:
a printed circuit board (PCB);
a plurality of optical components mounted to the PCB, wherein:
each of the plurality of optical components includes a top surface that includes one or more corners and an aperture positioned
in one of the corners,

a first subset of the plurality of optical components is mounted to the PCB such that the apertures of the first subset of
optical components are substantially aligned in a first plane,

a second subset of the plurality of optical components is mounted to the PCB such that the apertures of the second subset
of optical components are substantially aligned in a second plane that is substantially parallel to the first plane, and

the first subset of optical components is rotationally-oriented with respect to the second subset of optical components such
that the corners in which the apertures are positioned are nearest to one another;

a lens assembly positioned on the PCB, wherein:
the lens assembly defines a cavity in which the plurality of optical components are positioned and an optical fiber seat configured
to receive a plurality of optical fibers, and

the lens assembly includes an angled surface configured to redirect optical signals between the plurality of optical components
and the plurality of optical fibers received in the optical fiber seat.

US Pat. No. 9,103,991

MULTI-POLE OPTICAL SIGNAL SWITCH

Finisar Corporation, Sun...

1. An optical device comprising:
a) multiple input ports and multiple output ports for transmitting wavelength division multiplexing (WDM) signals therethrough;
b) a polarization transformation element that converts the wavelength division multiplexing (WDM) signals into a pair of optical
beams having substantially the same polarization;

c) a beam expanding element that laterally expands the pair of optical beams in a predetermined plane;
d) a first and second array of liquid crystal (LC) pixels, each of the first and second arrays of LC pixels being positioned
to receive a WDM signal transmitted through one of the ports; and

e) a first and second array of reflective elements, each reflective element in the first and second arrays of reflective elements
being associated with one of the LC pixels in the first and second arrays of LC pixels, the first array of LC pixels being
positioned adjacent to the first array of reflective elements and the second array of LC pixels being positioned adjacent
to the second array of reflective elements such that a WDM signal passes through an LC pixel prior to and after being reflected
by an associated reflective element, wherein the second array of LC pixels and the second array of reflective elements are
perpendicular to the first array of LC pixels and to the first array of reflective elements, the first array of LC pixels
and the first array of reflective elements steering the pair of optical beams to the second array of LC pixels and to the
second array of reflective elements, and wherein the LC pixels are controlled to cause a WDM signal incident thereon to attain
an attenuation state while an output of the WDM signal is being switched by an associated reflective element.

US Pat. No. 9,065,571

MODULAR CONTROLLER THAT INTERFACES WITH MODULAR OPTICAL DEVICE

FINISAR CORPORATION, Sun...

1. A controller positioned internal to a host computer housing and external to an optical module received by a host computer,
the controller comprising:
an analog interface adapted to couple to the optical module for delivering and/or receiving signals to and/or from the optical
module; and

a digital interface adapted to couple to a memory internal to the optical module, the digital interface being configured to:
receive digital diagnostic parameters including a digital representation of one or more operating characteristics of the optical
module, the digital diagnostic parameters including setup, identification, eye safety and general fault detection, and temperature
compensation;

deliver and/or receive signals to and/or from the optical module based on at least one of the digital diagnostic parameters;
and

deliver and/or receive signals complying with an appropriate one of multiple standards and/or protocols that can each be implemented
by the controller to and/or from the optical module depending on a type of optical module.

US Pat. No. 9,323,001

POLARIZATION-DEPENDENT LOSS COMPENSATOR

FINISAR CORPORATION, Sun...

11. A method to compensate polarization-dependent loss (PDL), the method comprising:
receiving, at a PDL compensator, an input signal subject to PDL within a propagation channel in which a first of two polarization
states of the input signal is attenuated more than a second of the two polarization states, the PDL compensator including
a substrate having an input surface and an output surface opposite the input surface, an anti-reflective coating formed on
the output surface, and a partial reflective coating formed on the input surface;

rotating the PDL compensator such that an incident angle of the input signal with respect to the input surface of the PDL
compensator is effective to compensate the PDL of the input signal within the propagation channel; and

compensating the PDL of the input signal.

US Pat. No. 9,538,637

MULTICHANNEL RF FEEDTHROUGHS

FINISAR CORPORATION, Sun...

1. An optoelectronic module comprising:
an optoelectronic module shell;
a printed circuit board at least partially positioned within the optoelectronic module shell;
an optical subassembly at least partially positioned within the optoelectronic module shell, the optical subassembly including:
an optical subassembly housing;
an optical transducer positioned within the optical subassembly housing;
an optical port defined in the optical subassembly housing through which optical data signals can pass between the optical
transducer and an optical fiber; and

a multichannel RF feedthrough formed in the optical subassembly housing, the multichannel RF feedthrough including:
an internal portion located within the optical subassembly housing, the internal portion including a top surface on which
first, second, third, and fourth sets of traces are formed, each set of traces configured as an electrical communication channel
to carry electrical data signals between the optical transducer and the printed circuit board;

an external portion located outside the optical subassembly housing, the external portion including a top surface on which
the second and third sets of traces are formed and a bottom surface on which the first and fourth sets of traces are formed;
and

first and second sets of vias connecting the first and fourth sets of traces, respectively, between the top surface of the
internal portion located within the optical subassembly housing and the bottom surface of the external portion located outside
the optical subassembly housing;

a bottom flexible electrical interface connected to the printed circuit board and the first and fourth sets of traces at the
bottom surface of the external portion of the multichannel RF feedthrough; and

a top flexible electrical interface connected to the printed circuit board and the second and third sets of traces at the
top surface of the external portion of the multichannel RF feedthrough.

US Pat. No. 9,405,071

DELAY LINE INTERFEROMETER MULTIPLEXER

FINISAR CORPORATION, Sun...

1. A delay line interferometer (DLI) multiplexer (MUX), comprising:
a first stage comprising:
a first DLI having a free spectral range (FSR) that is about four times a nominal channel spacing; and
a second DLI having an FSR that is about four times the nominal channel spacing, wherein transmission peaks of the second
DLI are shifted relative to transmission peaks of the first DLI by an amount about equal to the nominal channel spacing; and

a second stage that is operatively coupled to the first stage and comprising a third DLI optically coupled to the first DLI,
wherein an FSR of the third DLI is about two times the nominal channel spacing.

US Pat. No. 9,385,815

BANDWIDTH EFFICIENT DUAL CARRIER

FINISAR CORPORATION, Sun...

1. A transmit assembly, comprising:
a first optical transmitter configured to emit a first optical data signal centered at a first frequency;
a second optical transmitter configured to emit a second optical data signal centered at a second frequency offset from the
first frequency by a nominal offset n; and

a polarizing beam combiner configured to generate a dual carrier optical data signal by polarization interleaving the first
optical data signal with the second optical data signal;

wherein:
an output of the polarizing beam combiner is configured to be communicatively coupled via an optical transmission medium to
a polarization-insensitive receive assembly;

a spectral efficiency of the dual carrier optical data signal is at least 1 bit per second per hertz;
the nominal offset n is less than a bit rate of the first or second optical data signal such that frequency spectrums of the
first and second optical data signals overlap; and

interference between the first and second optical data signals is suppressed by providing the first and second optical data
signals with orthogonal polarizations.

US Pat. No. 9,137,589

NETWORK DEVICE MANAGEMENT USING AN RFID SYSTEM

FINISAR CORPORATION, Sun...

1. A method of controlling access to a network, the method comprising:
detecting that a new network device is attempting to communicate with an established network device over a wide area network;
communicating between a host computing device and an RFID reader over the wide area network, the RFID reader being physically
positioned within radio frequency communication range of a location of the new network device;

sending an interrogation signal from the RFID reader to an RFID tag that is coupled to the new network device;
receiving a parameter corresponding to the new network device from the RFID tag at the RFID reader in response to the interrogation
signal;

receiving the parameter from the RFID reader at the host computing device;
analyzing the parameter to determine whether the new network device is technologically compatible with the established network
device;

granting access to the new network device to communicate with the established network device if it is determined that the
new network device is technologically compatible with the established network device; and

denying access to the new network device to communicate with the established network device if it is determined that the new
network device is not technologically compatible with the established network device.

US Pat. No. 9,048,618

SHORT GAIN CAVITY DISTRIBUTED BRAGG REFLECTOR LASER

FINISAR CORPORATION, Sun...

1. A single mode laser comprising:
a gain cavity having a length from about 10 microns to about 150 microns;
a distributed Bragg reflector (“DBR”) region having a grating with a corrugation depth kappa of at least about 200 cm?1;

a gap region between the gain cavity and DBR region having a gap length that is less than about 30 microns; and
a single lasing mode at a long wavelength side of a Bragg peak of the DBR region.

US Pat. No. 9,217,838

HEAT SINK RETENTION IN AN OPTICAL COMPONENT

FINISAR CORPORATION, Sun...

1. A retention spring comprising:
a central portion having a heat sink contact surface, the heat sink contact surface configured to contact a detachable heat
sink;

a coupling feature configured to mechanically couple the retention spring to an optical component; and
a spring arm connecting the central portion to the coupling feature and configured to elastically deform to allow insertion
of the detachable heat sink between the heat sink contact surface and a heat dissipation surface of the optical component
and to at least partially retain the detachable heat sink against the heat dissipation surface.

US Pat. No. 9,184,846

PLUGGABLE OPTICAL HOST AND NETWORK I/O OPTOELECTRONIC MODULE

FINISAR CORPORATION, Sun...

1. A pluggable optical host and network I/O optoelectronic module comprising:
a first optical-electrical-optical (OEO) converter configured to convert N inbound optical signals to M inbound optical signals,
the first OEO converter comprising:

N network-side optical receivers;
first signal processing circuitry communicatively coupled to the N network-side optical receivers; and
M host-side optical transmitters communicatively coupled to the first signal processing circuitry; and
a second OEO converter configured to convert M outbound optical signals to N outbound optical signals, the second OEO converter
comprising:

M host-side optical receivers;
second signal processing circuitry communicatively coupled to the M host-side optical receivers; and
N network-side optical transmitters communicatively coupled to the second signal processing circuitry.

US Pat. No. 9,231,367

CO-MODULATION OF DBR LASER AND INTEGRATED OPTICAL AMPLIFIER

FINISAR CORPORATION, Sun...

1. A laser chip comprising:
a laser including an active region;
an optical amplifier integrated in the laser chip in front of and in optical communication with the laser;
a first electrode electrically coupled to the active region; and
a second electrode electrically coupled to the optical amplifier;
wherein the first electrode and the second electrode are configured to be electrically coupled to a common direct modulation
source,

wherein the common direct modulation source is configured to supply a modulation signal having a data rate of about 10 gigabits
per second or higher, wherein in response to application of the modulation signal to the first electrode, the DBR laser is
configured to generate an optical signal having a frequency modulation profile exhibiting both transient chirp and adiabatic
chirp, a ratio of transient chirp to adiabatic chirp being in a range from 1:3 to 1:4.

US Pat. No. 9,184,855

OPTO-ISOLATOR INCLUDING A VERTICAL CAVITY SURFACE EMITTING LASER

FINISAR CORPORATION, Sun...

1. An opto-isolator comprising:
a vertical cavity surface emitting laser (VCSEL);
a photodetector optically coupled to the VCSEL and configured to receive an output optical signal generated by the VCSEL;
a package enclosing the VCSEL and the photodetector, wherein the package includes an encapsulant that encapsulates the VCSEL
and photodetector;

a first reflective surface positioned outside of the encapsulant and optically aligned with the VCSEL so as to receive and
reflect the output optical signal; and

a second reflective surface positioned outside of the encapsulant and optically aligned with the first reflective surface
and photodetector so as to receive the reflected output optical signal from the first reflective surface and reflect the output
optical signal to the photodetector.

US Pat. No. 9,172,469

BACKDOOR DIAGNOSTIC COMMUNICATION TO TRANSCEIVER MODULE

FINISAR CORPORATION, Sun...

1. A transceiver module configured to interface with a host system, the transceiver module comprising:
a programmable controller;
an optical transmitter assembly coupled to the programmable controller and configured to transmit payload data over a network;
an optical receiver assembly coupled to the programmable controller and configured to receive payload data over the network;
a face that is at least partially external to the host system when the transceiver module is engaged in the host system;
a payload data port assembly that is accessible through the face and includes at least two optical connectors that are configured
to couple the optical transmitter assembly and the optical receiver assembly with the network via optical fibers; and

a diagnostic port assembly that includes one or more backdoor ports accessed through the face, wherein the diagnostic port
assembly is separate from the payload data port assembly and is configured to transfer diagnostic data to an external user
device via the one or more backdoor ports and to receive at least one of transceiver operating code, transceiver operational
parameters, and transceiver setup values from the external user device via the one or more backdoor ports under the control
of the programmable controller without suspending transmission of data via the optical transmitter assembly or receipt of
data via the optical receiver assembly,

wherein a diagnostic link between the diagnostic port assembly and the external user device is independent of the network.

US Pat. No. 9,146,366

LATCH MECHANISM FOR COMMUNICATION MODULE

FINISAR CORPORATION, Sun...

1. A module latch mechanism comprising:
a follower slidingly positioned relative to a housing, the follower including:
first and second arms that facilitate selective engagement of the housing with a host device and that are disposed on opposite
sides of the housing, and

a cross-piece that couples the first arm to the second and is disposed on a bottom of the housing, wherein the cross-piece
includes a first portion of a fastening mechanism, the fastening mechanism further includes a second portion that is included
in the housing, and the fastening mechanism facilitates selective engagement of the follower with the housing; and

a driver, wherein the driver is:
rotatingly positioned relative to the housing, and
positioned relative to the follower such that the driver urges the follower toward a first position relative to the housing
as the driver is rotated from an unlatched position to a latched position,

wherein the first arm defines an opening through which an EMI protrusion of the housing extends, the at least one EMI protrusion
is not included as part of the first arm, and a size of the opening is oversized compared to the at least one EMI protrusion
to permit the follower to slide forward and backward within a permissible range with respect to the housing while the at least
one EMI protrusion remains within the opening.

US Pat. No. 9,054,796

DUAL OPTICAL ELECTRICAL CONVERSION MODULE

FINISAR CORPORATION, Sun...

1. A dual optical-electrical conversion (DOEC) module comprising:
an optical host interface comprising an optical transmitter and an optical receiver;
an optical network interface comprising an optical transmitter and an optical receiver; and,
an integrated circuit configured to condition electrical signals communicated between the optical host interface and the optical
network interface, wherein:

the optical receiver of the optical host interface is selectively optically couplable to a second optical transmitter of a
second optical host interface of a second DOEC module;

in response to a fault on a first link between a host and the second optical transmitter of the second optical host interface
of the second DOEC module, the optical receiver of the optical host interface is configured to receive an optical signal from
the second optical transmitter of the second optical host interface of the second DOEC module and to convert the optical signal
to an electrical signal; and

the integrated circuit is configured to receive the electrical signal from the optical receiver of the optical host interface
and to provide the electrical signal to the optical transmitter of the optical host interface for optical transmission to
the host over a second link between the optical host interface and the host.

US Pat. No. 9,326,373

ALUMINUM NITRIDE SUBSTRATE

FINISAR CORPORATION, Sun...

1. A semi-rigid or flexible double-sided multi-layer printed circuit board that is sequentially laminated and suitable for
wire bonding and surface mount assembly, the printed circuit board comprising:
an aluminum nitride (AIN) substrate that includes:
an AIN thin film; and
a layer of high-frequency polymer as a carrier substrate of the AIN thin film, wherein:
the AIN substrate forms a first layer of the printed circuit board;
the AIN substrate comprises a heat spreader that laterally spreads out heat from a heat sink on the printed circuit board
to form a thermal dissipation path parallel with a signal path on the printed circuit board; and

a main substrate aligned to and bonded with the AIN substrate, the main substrate including one or more additional layers
of the printed circuit board.

US Pat. No. 9,230,416

COMMUNICATION DEVICES INCLUDING A SENSOR CONFIGURED TO DETECT PHYSICAL INPUT

FINISAR CORPORATION, Sun...

1. A communication device comprising:
a first communication module including:
a first illumination source,
a first body element configured to allow illumination generated by the first illumination source to propagate within and illuminate
at least a portion of an outer surface of the first body element, and

a sensor configured to detect a physical input applied at the first communication module;
a cable configured to transmit signals to and from the first communication module; and
a second communication module including:
a second illumination source, and
a second body element configured to allow illumination generated by the second illumination source to propagate within and
illuminate at least a portion of an outer surface of the second body element,

wherein the first communication module is configured to transmit a command to the second communication module via the cable
based at least in part on the sensor detecting the physical input at the first communication module, and

wherein the second communication module is configured to turn on the second illumination source based at least in part on
the command.

US Pat. No. 9,103,725

SYSTEM AND METHOD OF ELECTROMAGNETIC RADIATION CONTROL

FINISAR CORPORATION, Sun...

1. A method to compensate for electromagnetic radiation, the method comprising:
converting an optical signal into an electrical signal using an optical subassembly;
conditioning the electrical signal with circuitry that does not include the optical subassembly, wherein operation of the
circuitry results in generation of electromagnetic radiation that is different from the optical signal and not carried by
the optical subassembly;

measuring the electromagnetic radiation emanating from the circuitry at a first frequency using at least an antenna; and
adjusting at least one electrical setting of the circuitry based on the measurement of the electromagnetic radiation to reduce
the electromagnetic radiation emanating from the circuitry at the first frequency.

US Pat. No. 9,354,407

BIASING ASSEMBLY FOR A LATCHING MECHANISM

FINISAR CORPORATION, Sun...

1. A module comprising:
a shell;
a printed circuit board assembly (“PCBA”) at least partially positioned within the shell;
an optical transmitter electrically coupled to the PCBA;
an optical receiver electrically coupled to the PCBA; and
a biasing assembly including:
a latch cover configured to be attached to the shell;
a slider configured to operate a latching mechanism that releasably connects the module to a host device through a mechanical
connection, the slider including a main body including a first end, an arm extending from the first end, and a stopper feature
extending from the arm;

a spring positioned between the latch cover and the stopper feature to bias the latching mechanism;
the latch cover defining a spring opening configured to enable insertion of the spring through the latch cover and against
the stopper feature when the latch cover is in a first position and to capture the spring between the latch cover and the
stopper feature when the latch cover is in a second position; and

the spring opening including an insertion hole configured to align with the stopper feature when the latch cover is in the
first position and an extraction slot extending from the insertion hole, the extraction slot configured such that with the
latch cover is in the second position, a second spring end abuts the latch cover in a region surrounding the extraction slot.

US Pat. No. 9,250,027

THERMAL MANAGEMENT STRUCTURES FOR OPTOELECTRONIC SYSTEMS

FINISAR CORPORATION, Sun...

1. A thermal management system for an active cable connector, the system comprising:
a first printed circuit board (PCB) including a first mounting surface and an opposing surface opposite the first mounting
surface;

a first heat-generating component that is mounted on the first mounting surface;
a second PCB including a second mounting surface, wherein the first PCB and the second PCB are oriented such that the first
mounting surface and the second mounting surface are facing in a common direction;

a second heat-generating component that is mounted to the second mounting surface;
a shell defining a cavity in which the first PCB and the second PCB are positioned, the shell including a plurality of heat-transfer
areas on an internal shell surface, a first heat-transfer area of the plurality of heat transfer areas being positioned with
respect to the first heat-generating component to absorb a first portion of thermal energy generated by the first heat-generating
component; and

a back plate positioned with respect to the first heat-generating component to absorb a second portion of the thermal energy
generated by the first heat-generating component, positioned proximate to a second heat-transfer area of the plurality of
heat-transfer areas to transfer the second portion of the thermal energy to the shell, and positioned between the second mounting
surface of the second PCB and the opposing surface of the first PCB.

US Pat. No. 9,236,940

HIGH BANDWIDTH DEMODULATOR SYSTEM AND METHOD

Finisar Corporation, Hor...

1. A method of analysing an input optical signal, the method including the steps of:
(a) dividing the input signal into first and second orthogonal signal polarisation components;
(b) dividing a local oscillator signal having at least a first frequency into first and second orthogonal local polarisation
components;

(c) polarisation mixing the first signal polarisation component with the second local polarisation component to provide a
first mixed signal, wherein the first signal polarisation component is orthogonal to the second local polarisation component;

(d) polarisation mixing the second signal component with the first local polarisation component to provide a second mixed
signal, wherein the second signal polarisation component is orthogonal to the first local polarisation component;

(e) analysing the first and second mixed signals to determine optical power information of the first and second mixed signals
at at least the first frequency.

US Pat. No. 9,157,949

ACCELERATING THE AGING OF MULTIPLE LASERS

FINISAR CORPORATION, Sun...

1. A method of accelerating the aging of multiple lasers to thereby determine the failure of the lasers, the method comprising:
providing a current source configured for supplying current in a plurality of short signal pulses;
providing a first plurality of laser structures for reliability testing, wherein the first plurality of laser structures include
a first facet coating;

applying current from the current source to the first plurality of laser structures such that the first plurality of laser
structures emit output light beams having an output power and optical intensity, the current being applied to the first plurality
of laser structures in a plurality of short signal pulses so as to simulate the aging of the first plurality of laser structures;

ascertaining failure of the first plurality of laser structures based on their response to the plurality of short signal pulses;
providing a second plurality of laser structures for reliability testing, wherein the second plurality of laser structures
include a second facet coating that is different from the first facet coating;

applying current from the current source to the second plurality of laser structures such that the second plurality of laser
structures emit output light beams having an output power and optical intensity, the current being applied to the second plurality
of laser structures in a plurality of short signal pulses so as to simulate the aging of the second plurality of laser structures;

ascertaining failure of the second plurality of laser structures based on their response to the plurality of short signal
pulses; and

comparing failures of the first and second plurality of laser structures to determine which of the first and second facet
coatings caused their respective plurality of laser structures to be operated for a longer period of time without failure.

US Pat. No. 9,075,233

OPTICAL CELL WITH WAVELENGTH COMPENSATOR

FINISAR CORPORATION, Sun...

1. An optical cell comprising:
a splitter configured to split a light beam into first and second components and direct the first component into a first optical
path having a first optical path length and the second component into a second optical path having a second optical path length;

a coupler configured to join the first and second components; and
a first compensator disposed between the splitter and the combiner in the first optical path, the first compensator rotatable
about a first axis, wherein rotating the first compensator about the first axis varies a distance that the first optical path
passes through the first compensator thereby changing the first optical path length.

US Pat. No. 9,046,657

SYSTEMS AND METHODS FOR REDUCING OFF-AXIS OPTICAL ABERRATIONS IN WAVELENGTH DISPERSED DEVICES

Finisar Corporation, Hor...

1. An optical system including:
(a) at least one input port for projecting an input optical beam;
(b) a beam splitting element for spatially separating said optical beam into a plurality of optical sub beams disposed in
a first dimension;

(c) a plurality of output ports disposed in a second dimension for receiving predetermined ones of said plurality of optical
sub beams;

(d) an optical power element for manipulating the beam profiles of said optical sub beams;
(e) a switching element for selectively switching said optical sub beams along trajectories relative to a central optical
axis to predetermined ones of said output ports; and

(f) means for selectively defining trajectories which reduce optical aberrations in said system arising from beam propagation
off the central optical axis.

US Pat. No. 9,545,033

COMMUNICATION MODULE ASSEMBLY WITH HEAT SINK AND METHODS OF MANUFACTURE

FINISAR CORPORATION, Sun...

1. An assembly comprising:
a cage having a cage body defining a first open end and an open top, the cage body having one or more rails on each side of
the open top between the first open end and a second end wall of the cage body, a cage cavity having the first open end and
the open top;

a module device located in the cage cavity so as to protrude from the first open end; and
a heat sink slidably received and located in the cage cavity over and thermally coupled with the module device so as to protrude
from the open top, the heat sink having a heat sink body defining one or more slots on each side that slidably receive and
mate with the one or more rails of the cage,

wherein one of the rails or the slots includes one or more leaf springs and another of the rails or the slots includes one
or more leaf spring-receiving surfaces.

US Pat. No. 9,438,354

ELECTROMAGNETIC POWER MEASUREMENT AND REPORTING

FINISAR CORPORATION, Sun...

1. A method, comprising:
receiving an optical signal;
generating an electrical signal in response to optical signal, a magnitude of the electrical signal based on a power of the
optical signal;

applying an adjustable gain to the electrical signal to generate an amplified electrical signal;
sampling the amplified electrical signal to generate a digital sample of the amplified electrical signal; and
controlling the adjustable gain applied to the electrical signal based on a value of the digital sample to substantially maintain
the value of the digital sample within a particular resolution zone of an analog-to-digital converter, wherein controlling
the adjustable gain comprises:

comparing the value of the digital sample with a high threshold digital sample value;
comparing the adjustable gain with a low threshold gain value; and
in response to the value of the digital sample exceeding the high threshold digital sample value and the adjustable gain exceeding
the low threshold gain value, decreasing the adjustable gain.

US Pat. No. 9,413,464

OPTOELECTRONIC ASSEMBLY FOR SIGNAL CONVERSION

FINISAR CORPORATION, Sun...

20. An optoelectronic assembly, comprising:
a first component and a glass component that define a cavity;
a lens located on a first surface of the glass component;
an optoelectronic component positioned within the cavity, the optoelectronic component comprising an optical transmitter or
an optical receiver;

conductive traces located on a second surface of the glass component;
an electronic component coupled to the conductive traces;
a printed circuit board (PCB) positioned against the glass component; and
an electrical coupler extending from the conductive traces to an interior layer inside of the PCB;
wherein a first side of the optoelectronic component is electrically coupled to the conductive traces and an oppositely positioned
second side of the optoelectronic component is mechanically coupled to the first component.

US Pat. No. 9,298,023

OPTICAL BEAM STEERING FOR TUNABLE LASER APPLICATIONS

FINISAR CORPORATION, Sun...

1. A method for tuning a transmitter to a selected wavelength comprising:
selecting a laser having the selected wavelength within a tunable range thereof from an array of tunable lasers;
tuning the selected laser to the selected wavelength;
tuning an index of refraction of one of a first prism and a second prism, the first prism positioned to receive an output
of the selected laser and the second prism positioned to receive an output of the first prism and to at least partially reverse
an angular shift in the output of the first prism relative to the output of the selected laser, an output of the second prism
being incident on an optical spectrum reshaper;

driving a temperature of the optical spectrum reshaper to an operating temperature at which a transmission function of the
optical spectrum reshaper has a transmission edge corresponding to the selected wavelength;

frequency modulating the selected laser such that the output of the selected laser is frequency modulated; and
transmitting the output of the selected laser through the optical spectrum reshaper configured to at least partially convert
frequency modulation in the output of the selected laser to amplitude modulation.

US Pat. No. 9,191,123

INTEGRATED CIRCUITS IN OPTICAL RECEIVERS

FINISAR CORPORATION, Sun...

1. A circuit comprising:
a photodiode configured to receive an optical signal and convert the optical signal to a current signal;
a transimpedance amplifier configured to convert the current signal to a voltage signal;
an equalizer configured to equalize the voltage signal to at least partially compensate for a loss of a high frequency component
of the optical signal; and

a driver coupled to the equalizer, the driver comprising a non-linear driver configured to drive the equalized voltage signal
to a clock and data recovery circuit in a first integrated circuit separate from a second integrated circuit that includes
the driver, the equalizer, and the transimpedance amplifier.

US Pat. No. 9,124,069

VERTICAL CAVITY SURFACE EMITTING LASER WITH UNDOPED TOP MIRROR

FINISAR CORPORATION, Sun...

1. A VCSEL formed on a substrate comprising:
an epitaxial structure having a laterally narrower mesa structure on a laterally wider base and having a longitudinal axis
aligned with a direction of light emitted from the VCSEL;

the mesa structure with a top mesa surface and side mesa surface and containing an undoped top mirror;
the base comprising:
a periodically doped conduction layer coupled to the undoped top mirror and having a top surface extending from the mesa laterally
away from the mesa side surface;

an active region coupled to the conduction layer;
an undoped bottom mirror between the active region and substrate; and
a periodically doped spacer layer between the active region and undoped bottom mirror;
a dielectric material on the top surface of the periodically doped conduction layer and having a tapered profile shape from
a longitudinally thinner inner portion proximal the mesa side surface to a longitudinally thicker outer portion distal the
mesa side surface;

an isolation trench extending from the top surface of the periodically doped conduction layer to the periodically doped spacer
layer and having the dielectric material so as to laterally bound the active region;

a first intracavity contact coupled to the periodically doped conduction layer and the undoped top mirror, the first intracavity
contact covering a portion of the top mesa surface and extending over the side mesa surface, periodically doped conduction
layer, and dielectric material to the longitudinally thicker outer portion; and

a second intracavity contact having a portion in the isolation trench and being coupled to the periodically doped spacer layer.

US Pat. No. 9,052,483

COMMUNICATION MODULE ASSEMBLY WITH HEAT SINK AND METHODS OF MANUFACTURE

FINISAR CORPORATION, Sun...

1. An assembly comprising:
a module device, the module device having a first portion with a small cross-sectional profile and a second portion with a
large cross-sectional profile;

a cage having a cage body defining a first open end having the first portion of the module device received therethrough with
the second portion extending from the first open end of the cage, and the cage body defining one or more rail-shaped first
receiver members arranged in a rail plane of the cage between the first open end and an opposite second end, the one or more
rail-shaped first receiver members defining a first part of a fastening system; and

a heat sink slidably received into the cage so as to be thermally coupled with the first portion of the module device, the
heat sink having a heat sink body defining one or more slot-shaped second receiver members receiving the one or more rail-shaped
first receiver members, the one or more slot-shaped second receiver members defining a second part of the fastening system
engaged with the first part of the fastening system, wherein one of the first or second part of the fastening system includes
one or more rail springs and another of the first or second part includes one or more spring-receiving surfaces.

US Pat. No. 9,397,754

LINECARDS WITH PLUGGABLE INTERFACES FOR PLUGGABLE OPTICAL AMPLIFIERS AND OTHER PLUGGABLE DEVICES

Finisar Corporation, Hor...

1. A linecard comprising:
a) a linecard processor;
b) a centralized host processor;
c) a plurality of pluggable interfaces; each of the plurality of pluggable interfaces electrically coupled to the centralized
host processor;

d) a plurality of pluggable devices, each of the plurality of pluggable devices being electrically coupled to one of the plurality
of pluggable interfaces, wherein at least one of the plurality of pluggable devices comprises a pluggable EDFA optical amplifier
device comprising a drive circuit and a digital-to-analog converter that converts digital signals which instruct the drive
circuit to control a gain and a power of an EDFA, wherein each of the plurality of pluggable devices is controlled by the
centralized host processor; and

e) a flash memory that stores calibration data for the pluggable EDFA optical amplifier device.

US Pat. No. 9,318,639

GALLIUM ARSENIDE AVALANCHE PHOTODIODE

FINISAR CORPORATION, Sun...

1. An avalanche photodiode comprising:
an avalanche region having one or more layers prepared from GaAs
an N? absorption layer extending across the avalanche region;

an N-type layer above at least a center portion of the N? absorption layer; and

a lower conductivity layer laterally from the N-type layer to a surface of the avalanche region and above a perimeter portion
of the N? absorption layer, the lower conductivity layer having lower conductivity compared to the N-type layer.

US Pat. No. 9,217,837

LATCH MECHANISM FOR COMMUNICATIONS MODULE

FINISAR CORPORATION, Sun...

1. A module latch mechanism comprising:
a follower configured to be slidingly positioned relative to a housing and to facilitate selective engagement of the housing
with a host device, the follower including a retaining member configured to retain a resilient member in at least one direction
such that the resilient member urges the follower towards a first position relative to the housing; and

a driver configured to be rotatingly positioned relative to the housing, the driver including:
a cam configured to urge the follower towards a second position relative to the housing as the driver is rotated from a latched
position to an unlatched position; and

a flanged protrusion configured to be received by a flanged opening of the housing.

US Pat. No. 9,325,425

METHOD AND APPARATUS FOR DEMODULATING AND REGENERATING PHASE MODULATED OPTICAL SIGNALS

Finisar Corporation, Hor...

1. A DPSK/DQPSK optical receiver comprising:
a) an optical splitter having an input that receives a DPSK/DQPSK modulated optical signal and a plurality of outputs, the
optical splitter separating the DPSK/DQPSK modulated optical signal into a plurality of channels according to a fixed non-equal
optical power splitting ratio C:(1?C) propagating a plurality of received optical signals to the plurality of outputs, the
optical power splitting ratio being chosen to reduce degradation caused by at least one of chirping, chromatic dispersion,
polarization-mode dispersion, and spectrally narrowing;

b) a plurality of delay interferometers, an input of a respective one of the plurality of delay interferometers being optically
coupled to a respective one of the plurality of outputs of the optical splitter, each of the plurality of delay interferometers
passing a filtered optical signal, the delay interferometers comprising an optical delay and a variable phase shifter being
configured so that a free spectral range and a phase shift of each of the plurality of delay interferometers are separately
tuned to reduce degradation caused by at least one of chirping, chromatic dispersion, polarization-mode dispersion, and spectrally
narrowing;

c) a plurality of optical detectors, an input of a respective one of the plurality of optical detectors being optically coupled
to an output of a respective one of the plurality of optical filters, each of the plurality of optical detectors generating
an electrical detection signal related to a power of a respective filtered optical signal;

d) a plurality of electrical amplifiers, an output of each of the plurality of optical detectors being electrically coupled
to an input of one of the plurality of amplifiers, each of the plurality of electrical amplifiers generating an amplified
electrical signal; and

e) at least one electrical signal combiner having a plurality of inputs, an output of a respective one of the plurality of
electrical amplifiers being electrically connected to a respective one of the plurality of inputs of the at least one electrical
combiner so that each input of the least one electrical signal combiner receives a signal corresponding to a channel propagating
a received optical signal separated by the splitter with the fixed non-equal optical power splitting ratio C:(1?C), the at
least one electrical combiner adding or subtracting the amplified electrical detection signals generated by the plurality
of electrical amplifiers into a combined reception signal at an output.

US Pat. No. 9,318,872

VCSEL WITH INTEGRATED ELECTRICALLY MODULATED INTRA-CAVITY GRAPHENE ABSORBER

FINISAR CORPORATION, Sun...

1. A VCSEL comprising:
a bottom electrode;
a bottom mirror stack electrically coupled to and over the bottom electrode;
an active region having a lasing region over the bottom mirror stack;
a top mirror stack over the active region;
an oxide aperture over the active region;
a contact region over the top mirror stack;
a contact electrode electrically coupled with the contact region;
a graphene intra-cavity absorber having at least one graphene region and at least one dielectric region adjacent to the graphene
region and between the graphene region and lasing region such that the dielectric region isolates the graphene region from
the lasing region, the graphene intra-cavity absorber including a bottom graphene region over the contact region, a dielectric
region over the contact region, and a top graphene region over the dielectric region;

a graphene electrode electronically coupled with the top graphene region; and
a dielectric mirror over the graphene region.

US Pat. No. 9,235,006

OPTICAL CHANNEL MONITOR

Finisar Corporation, Hor...

1. An optical channel monitor including:
a plurality of input ports disposed in a first dimension, each input port being adapted for transmitting an optical beam including
a plurality of individual wavelength channels;

an optical power element collimating each optical beam and angularly converging the beams, in the first dimension, to a focal
plane, the optical power element having a focal length F1;

a wavelength dispersion element spatially separating the wavelength channels of each optical beam in a second dimension;
a selectively movable micro-electromechanical (MEMS) mirror that simultaneously directs each optical beam onto the wavelength
dispersion element at a predetermined angle in the first dimension; and

a plurality of output ports disposed in the first dimension for receiving and outputting at least one spatially separated
predetermined wavelength channel of each optical beam for detection of one or more characteristics of each predetermined wavelength
channel;

wherein the optical power element is centrally disposed at a distance equal to the focal length F1 from both the input ports and the wavelength dispersion element such that a predetermined wavelength channel of each optical
beam is simultaneously coupled to a predetermined output port; in the first dimension, the optical beams are collimated and
converged onto the wavelength dispersive element and the predetermined wavelength channels are focused into the input/output
ports; and in the second dimension, the optical beams are collimated onto the wavelength dispersive element and the predetermined
wavelength channels are focused into the input and output ports.

US Pat. No. 9,490,895

ULTRAFAST HIGH RESOLUTION OPTICAL CHANNEL MONITOR

Finisar Corporation, Hor...

18. A optical channel monitor including:
a tunable laser to provide a first local oscillator input, the tunable laser being adapted to scan across a plurality of wavelengths
to tune the first local oscillator input;

an optical channel signal including at least one optical channel;
first and second beam splitters, each of the beam splitters splitting the input optical signal into substantially orthogonal
first and second polarization components, and outputting the first and second polarization components at predetermined positions;
and

a series of polarization transformation elements arranged around the beam splitters for transforming the polarization of the
first and second polarization components to predetermined transformed first and second polarization components;

wherein, a first polarization component of the first local oscillator input is mixed with an orthogonal second polarization
component of the optical channel signal to form a first mixer output; and a second orthogonal polarization component of the
first local oscillator source is mixed with the first orthogonal polarization component of the optical channel signal to form
a second mixer output.

US Pat. No. 9,437,912

3-D INTEGRATED PACKAGE

FINISAR CORPORATION, Sun...

1. An electronics package comprising:
a plurality of transition layers, each transition layer including:
an insulating layer;
a signal via configured to pass through the insulating layer and that is electrically coupled with the signal via of an adjacent
transition layer;

a ground plane having a signal cut configured to provide clearance between the ground plane and the signal via; and
a plurality of ground vias each configured to electrically couple the ground plane of the transition layer with the ground
plane of an adjacent transition layer; and

an electrically conductive transmission line including:
a coplanar waveguide portion electrically coupled to a microstrip portion;
the signal vias of the plurality of transition layers; and
a signal pin electrically coupled to the signal vias, wherein the signal pin is configured to be electrically coupled to a
printed circuit board (PCB) via a PCB signal trace deposited on the PCB.

US Pat. No. 9,350,454

MULTI-LASER TRANSMITTER OPTICAL SUBASSEMBLY

FINISAR CORPORATION, Sun...

1. A multi-laser transmitter optical subassembly (TOSA) comprising:
first, second, third, and fourth lasers configured to generate first, second, third, and fourth optical signals having first,
second, third, and fourth wavelengths, respectively;

a mirror;
first, second, and third filters having first, second, and third filter surfaces facing the mirror;
first, second, third, and fourth collimating lenses having first, second, third, and fourth axes, respectively, two or more
of the axes not being parallel to each other, the first, second, third, and fourth collimating lenses each individually adjusted
and aligned to collimate and transmit the first, second, third, and fourth optical signals, respectively; and

a focusing lens,
wherein the first collimating lens is configured to align the first optical signal with the second optical signal passing
through the first filter, the first filter is configured to combine the first and second optical signals, the second collimating
lens is configured to align the second optical signal with the third optical signal passing through the second filter, the
second filter is configured to combine the first, second, and third optical signals, the third collimating lens is configured
to align the third optical signal with the fourth optical signal passing through the third filter, and the third filter is
configured to both combine the first, second, third, and fourth optical signals and transmit the combined first, second, third,
and fourth optical signals toward the focusing lens.

US Pat. No. 9,081,156

SIMPLIFIED AND SHORTENED PARALLEL CABLE

FINISAR CORPORATION, Sun...

1. A connector comprising:
a connector housing having inner and outer surfaces extending between forward and rear ends of the connector housing, wherein
the inner surfaces define a passageway extending lengthwise between the forward and rear ends and the connector housing includes
at least one protrusion formed on one of the outer surfaces, the at least one protrusion configured to engage a corresponding
connector engaging structure of an alignment guide to secure the connector housing at least partially within the alignment
guide;

a ferrule for mounting upon end portions of a plurality of optical fibers of a multi-fiber communication cable, the ferrule
disposed partially within the passageway defined by the connector housing such that a forward portion of the ferrule is exposed
through the forward end of the connector housing; and

a crimp ring at least partially encompassing the rear end of the connector housing and configured to secure the connector
to the multi-fiber communication cable.

US Pat. No. 9,288,559

MULTI DIRECTIONAL MULTIPLEXER

Finisar Corporation, Sun...

1. An optical signal manipulation system including:
a plurality of input ports configured for transmitting an optical signal including a plurality of wavelength channels, said
input ports being spatially separated at least in a switching dimension;

a wavelength dispersion element for simultaneously spatially separating said wavelength channels from said optical signals
in a dispersion dimension perpendicular to said switching dimension;

an optical power element for focusing each said spatially separated wavelength channel in said dispersion dimension;
a wavelength manipulation element for separately manipulating each of the focused spatially separated wavelength channels
to selectively steer the wavelength channels in at least the switching dimension; and

a steering element for independently selectively directing the wavelength channels in at least the switching dimension such
that said wavelength channels are coupled to predetermined output ports disposed in predetermined positions spaced at least
along said switching dimension;

wherein said wavelength manipulation element steers said wavelength channels by an angle in the switching dimension, relative
to their respective originating input port, that is less than or equal to the predetermined position of an intended said output
port divided by the focal length of said optical power element.

US Pat. No. 9,148,230

OPTICAL CHANNEL MONITOR

FINISAR CORPORATION, Sun...

1. An optical channel monitor, comprising:
means for filtering an optical signal having a plurality of channels spaced at a nominal channel spacing, wherein the means
for filtering comprises two tunable filters, each having an input;

means for separating the optical signal into one or more odd channels and one or more even channels, wherein:
the nominal channel spacing is between about one and two times an input channel spacing Fi of the means for separating;

a ?20 decibel bandwidth of the means for filtering is between about two and four times the input channel spacing Fi;

the means for separating comprises a deinterleaver having an odd output and an even output;
the input of one of the tunable filters is coupled to the odd output of the deinterleaver; and
the input of the other of the tunable filters is coupled to the even output of the deinterleaver;
means for measuring optical power of passband signals generated by directing the optical signal through both the means for
filtering and the means for separating; and

means for scanning the means for filtering across a plurality of center frequencies corresponding to the plurality of channels
of the optical signal.

US Pat. No. 9,337,932

CHIP ON FLEX OPTICAL SUBASSEMBLY

FINISAR CORPORATION, Sun...

1. An optical subassembly comprising:
a flex circuit constructed of at least one electrically-conductive layer and at least one electrical insulator layer;
an optical port defining a barrel cavity and a fiber receiver configured to receive an optical fiber, wherein the optical
port is mechanically coupled to the flex circuit at a flex connection;

an active optical component subassembly that is positioned within the barrel cavity, electrically coupled to the flex circuit,
and that includes at least one active optical component that is mechanically coupled directly to the flex circuit; and

a plate through which an optical signal that is communicated by at least one component of the active optical component subassembly
passes, wherein the plate is fixed to the optical port and positioned within the barrel cavity between the active optical
component subassembly and the fiber receiver.

US Pat. No. 9,423,579

LATCH MECHANISM FOR COMMUNICATION MODULE

FINISAR CORPORATION, Sun...

1. An optoelectronic module, comprising:
a housing;
a driver rotatably coupled to the housing and configured to rotate relative to the housing about an axis of rotation, wherein
the driver comprises a base and first and second arms that extend in a common direction from opposite ends of the base, where
the common direction is orthogonal to the base;

a first pivot member coupled to the first arm of the driver or to the housing;
a second pivot member coupled to the second arm of the driver or to the housing, wherein the first and second pivot members
define the axis of rotation;

a first cam member coupled to the first arm of the driver at a first location radially offset from the axis of rotation;
a second cam member coupled to the second arm of the driver at a second location radially offset from the axis of rotation;
and

a follower slidably coupled to the housing, wherein the follower is configured to slide forward or rearward relative to the
housing in response to rotation of the driver about the axis of rotation, wherein the follower comprises a base and two upright
portions that extend in a common direction that is orthogonal to the base of the follower and from opposite ends of the base
of the follower, and wherein each of the upright portions includes an “L”-like opening that includes an upright slot connected
to a horizontal slot.

US Pat. No. 9,348,102

PIN CADENCE FOR HIGH-SPEED CONNECTORS

FINISAR CORPORATION, Sun...

1. A connector comprising:
a plurality of pins having a pinout including at least one functional designation cadence including:
a first ground pin, a first signal pin, a no-connect pin, a second signal pin, and a second ground pin, wherein the first
signal pin is positioned between the first ground pin and the no-connect pin, the no-connect pin is positioned between the
first signal pin and the second signal pin, and the second signal pin is positioned between the no-connect pin and the second
ground pin; or

a first ground pin, a first signal pin, a third ground pin, a second signal pin, and a second ground pin, wherein the first
signal pin is positioned between the first ground pin and the third ground pin, the third ground pin is positioned between
the first signal pin and the second signal pin, and the second signal pin is positioned between the third ground pin and the
second ground pin.

US Pat. No. 9,148,129

DRIVER CIRCUIT WITH ASYMMETRIC BOOST

FINISAR CORPORATION, Sun...

1. A circuit comprising:
an input node configured to receive a signal;
an output node configured to be coupled to a load;
a first circuit coupled between the input node and the output node, the first circuit configured to receive the signal and
drive the signal on the output node at a first voltage; and

a signal adjust circuit configured to adjust a current of the signal driven by the first circuit, the signal adjust circuit
configured to apply a first current adjustment to adjust the current of the signal at one but not both of a falling edge of
the signal or a rising edge of the signal.

US Pat. No. 9,348,101

LATCH MECHANISMS FOR MODULES

FINISAR CORPORATION, Sun...

1. A module comprising:
a housing including a port opening, a first rib located entirely below the port opening on a first side of the housing, and
a second rib located entirely below the port opening on a second side of the housing positioned opposite the first side of
the housing; and

a release slide slidingly positioned at least partially on the housing, the release slide including:
a release slide base;
a first release slide arm extending from the release slide base, the first release slide arm at least partially positioned
on the first side of the housing, the first release slide arm including a first flange extending from the first release slide
arm, the first flange positioned at least partially over the first rib; and

a second release slide arm extending from the release slide base, the second release slide arm at least partially positioned
on the second side of the housing, the second release slide arm including a second flange extending from the second release
slide arm, the second flange positioned at least partially over the second rib.

US Pat. No. 9,146,367

MODULAR DEVICE FOR AN OPTICAL COMMUNICATION MODULE

FINISAR CORPORATION, Sun...

1. A modular device for an optical communication module configured to be coupled to an optical transmission medium, the modular
device comprising:
a first edge and a second edge; and
N number of electrical circuit channels between the first and second edges, each electrical circuit channel comprising at
least one element configured to provide functionality for communicating optical signals through the optical transmission medium,

wherein the modular device has a width between the first and second edges so that each of the N number of electrical circuit
channels of C number of modular devices aligns with one of P number of interface channels of an opto-electrical interface
configured to be coupled to the optical transmission medium when C equals P/N and C is a whole number greater than zero.

US Pat. No. 9,309,908

COMMUNICATION MODULE LATCHING MECHANISM

FINISAR CORPORATION, Sun...

1. A latching mechanism configured to selectively secure a communication module to a receptacle of a host device, the latching
mechanism comprising:
a latch including a latch hook and latch protrusion;
a latch release; and
a cam mechanically coupled to latch release, the cam positioned with respect to the latch such that an activation force applied
to the latch release translates the cam to contact the latch protrusion and displace the latch hook,

wherein the latch comprises a first portion including the latch hook, a second portion integral with the first portion, and
a latch neck connecting a third portion to the second portion, the second portion and the first portion configured to be displaced
substantially in a first direction;

wherein when the second portion and the first portion are displaced, a return force is generated that urges the second portion
and the first portion in a second, opposite direction;

wherein the third portion includes two securing features separated by an intra-securing feature dimension, the securing features
configured to secure the latch to a shell of a module; and

wherein the latch release comprises a latch release member having a member neck width corresponding to the intra-securing
feature dimension, the latch release configured to be positioned between the securing features, and two coupling flaps separated
by an inter-coupling flap dimension corresponding to a width dimension of the latch neck, wherein the coupling flaps are configured
to be mechanically coupled to the cam and the latch neck is sized to be positioned between the coupling flaps.

US Pat. No. 9,723,725

RIGID-FLEXIBLE CIRCUIT INTERCONNECTS

FINISAR CORPORATION, Sun...

1. A circuit interconnect comprising:
a first printed circuit board (PCB) including a first electrically conductive pad and a first spacer consisting of a first
electrically conductive plate and a first dielectric layer located on the first electrically conductive plate;

a second PCB including a second electrically conductive pad and a second spacer consisting of a second electrically conductive
plate and a second dielectric layer located on the second electrically conductive plate;

the first spacer and the second spacer configured to at least partially abut and to position the first PCB relative to the
second PCB such that a space remains between the first PCB and the second PCB after the first electrically conductive pad
and the second electrically conductive pad are conductively connected in a soldering process, wherein the first spacer and
the second spacer each have a height equivalent to one-half the height of the space that remains between the first PCB and
the second PCB; and

an electrically conductive solder joint conductively connecting the first electrically conductive pad and the second electrically
conductive pad.

US Pat. No. 9,268,106

OPTICAL FIBER SECURING DEVICE

FINISAR CORPORATION, Sun...

1. An optical fiber securing device comprising:
a passage having an entrance and an exit, the passage configured to receive therein an optical fiber inserted through the
entrance;

an epoxy well configured to receive therein an epoxy;
an epoxy path that provides a pathway for epoxy between the epoxy well and the passage;
an optical fiber seat configured to receive at least a portion of the optical fiber, the optical fiber seat configured to
position an end of the optical fiber in optical alignment with a lens; and

a protrusion defining an upper boundary of the passage at the exit of the passage, the protrusion configured to restrain epoxy
received within the passage such that the epoxy does not become interposed between the end of the optical fiber and the lens.

US Pat. No. 9,438,460

PARTIAL DISCRETE FOURIER TRANSFORM-SPREAD IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM

FINISAR CORPORATION, Sun...

11. A system comprising:
a serial-to-parallel quadrature amplitude modulation (QAM) module configured to receive a first stream of serial data bits
and to convert the first stream of serial data bits into a set of parallel QAM symbols; and

a partial discrete Fourier transform-spread (DFT-S) module communicatively coupled to the serial-to-parallel QAM module, the
partial DFT-S module configured to apply a partial DFT-S technique to transform a first subset of QAM symbols from the set
of parallel QAM symbols into a single-carrier QAM signal, wherein:

the partial DFT-S module includes a discrete Fourier transform (DFT) module and an inverse discrete Fourier transform (IDFT)
module;

the IDFT module is configured to transform one or more remaining QAM symbols from the set of parallel QAM symbols to form
one or more high-frequency subcarrier signals, wherein each of the one or more high-frequency subcarrier signals bears information
of a corresponding QAM symbol from the one or more remaining QAM symbols; and

the IDFT module is configured to generate a hybrid signal that includes the single-carrier QAM signal and the one or more
high-frequency subcarrier signals, wherein the hybrid signal is configured to transmit to a receiver.

US Pat. No. 9,407,259

DRIVER CIRCUIT

FINISAR CORPORATION, Sun...

1. A circuit comprising:
first and second input nodes configured to receive a differential input signal with a first voltage swing;
first and second output nodes;
an amplification circuit coupled to the first and second input nodes, the amplification circuit configured to receive the
differential input signal and to generate first and second intermediate signals based on the differential input signal, both
the first and second intermediate signals include voltage swings that are larger than the first voltage swing;

a first active device coupled to the first output node and the amplification circuit, the first active device configured to
conduct based on the first intermediate signal;

a second active device coupled to the second output node and the amplification circuit, the second active device configured
to conduct based on the second intermediate signal; and

an output circuit coupled to the amplification circuit and the first and second output nodes, the output circuit including:
an adjust circuit configured to receive and adjust the first and second intermediate signals to generate adjusted first and
second intermediate signals;

a first output transistor coupled to the first output node and configured to conduct based on the adjusted second intermediate
signal such that the output circuit outputs a first output signal on the first output node; and

a second output transistor coupled to the second output node and configured to conduct based on the adjusted first intermediate
signal such that the output circuit outputs a second output signal on the second output node,

wherein the adjust circuit adjusts the first and second intermediate signals such that the first and second output transistors
conduct in a saturation region.

US Pat. No. 9,348,091

MULTIPLEXER/DEMULTIPLEXER BASED ON DIFFRACTION AND REFLECTION

Finisar Corporation, Sun...

1. An optical apparatus comprising one or more transmissive diffractive optical elements, one or more reflective optical elements,
and a set of multiple optical sources or receivers, wherein:
the one or more diffractive optical elements, the one or more reflective optical elements, and the set of multiple optical
sources or receivers are held in substantially fixed positions relative to one another;

the one or more diffractive optical elements include (i) a multiplexed transmission region characterized by a corresponding
average grating-normal vector direction, a corresponding average grating wavevector magnitude, and a corresponding average
grating wavevector direction, and (ii) multiple demultiplexed transmission regions that are spatially displaced from one another,
each of which is characterized by a corresponding average grating-normal vector direction, a corresponding average grating
wavevector magnitude, and a corresponding average grating wavevector direction;

each one of the one or more reflective optical elements is characterized by a corresponding average reflector-normal vector
direction and a corresponding reflector surface shape;

the relative positions of the one or more diffractive optical elements, one or more reflective optical elements, and set of
multiple optical sources or receivers, the grating-normal vector directions, the grating wavevector magnitudes, the grating
wavevector directions, the reflector-normal vector directions, and the reflector surface shapes are such that each one of
a set of multiple optical signals, at corresponding different selected signal wavelengths in an operational wavelength range,
co-propagating to the multiplexed transmission region along a multiplexed beam path would (i) be transmissively, dispersively
diffracted at the multiplexed transmission region, (ii) propagate between the multiplexed transmission region and a corresponding
demultiplexed transmission region undergoing at least one reflection from at least one of the one or more reflective optical
elements, (iii) be transmissively, dispersively diffracted at the corresponding demultiplexed transmission region, and (iv)
propagate between the corresponding demultiplexed transmission region and a corresponding one of the set of multiple optical
sources or receivers along a corresponding one of multiple demultiplexed beam paths.

US Pat. No. 9,467,153

LOW POWER AND COMPACT AREA DIGITAL INTEGRATOR FOR A DIGITAL PHASE DETECTOR

FINISAR CORPORATION, Sun...

1. A circuit comprising:
a first circuit configured to receive a reference signal and a source signal and to generate a correction signal indicating
a difference in phase between the reference signal and the source signal;

a second circuit configured to receive the correction signal and to generate a digital signal indicating a phase-to-digital
conversion of the correction signal;

a third circuit configured to receive the digital signal and to generate a control signal indicating a converted value of
the digital signal;

a fourth circuit configured to receive the control signal and to generate a source signal in response to the control signal;
and

a fifth circuit configured to compare a characteristic of the digital signal to a predetermined range and to generate a lock
signal if a characteristic of the digital signal indicates the ability to achieve phase-lock.

US Pat. No. 9,246,590

SMART OPTICAL TRANSCEIVER HAVING INTEGRATED OPTICAL DYING GASP FUNCTION

FINISAR CORPORATION, Sun...

1. An optical transceiver, comprising:
an electric terminal configured to receive power from a host equipment and to provide a power supply voltage to the optical
transceiver;

a power failure monitor circuit integrated in the optical transceiver, where the power failure monitor circuit is configured
to detect an imminent loss of the power supply voltage, wherein the power failure monitor circuit is configured to produce
a dying-gasp control signal when such imminent loss of power supply voltage is detected or when a disabling control signal
is received from the host equipment;

a driver configured to receive output data and the dying-gasp control signal; and
an optical transmitter powered by the power supply voltage and configured to emit a first optical signal under the control
of the driver, wherein the driver and the optical transmitter are configured to produce an optical-layer dying-gasp signal
in response to the dying-gasp control signal.

US Pat. No. 9,494,810

AUTOMATIC BIAS STABILIZATION OF DUAL-POLARIZATION IN-PHASE AND QUADRATURE OPTICAL MODULATOR

FINISAR CORPORATION, Sun...

1. A method of automatic bias stabilization, the method comprising:
simultaneously dithering DC-bias voltage of each of an X polarization in-phase child Mach-Zehnder modulator (MZM), an X polarization
quadrature-phase child MZM, and an X polarization parent MZM included in an X polarization arm of a dual-polarization in-phase
and quadrature optical modulator (IQM) according to three first dither patterns that are different from each other;

detecting, at a first tap monitor photodiode coupled to an output of the X polarization arm, an X polarization interference
term between the three first dither patterns;

sampling an output of the first tap monitor photodiode to generate an X polarization interference signal indicative of the
X polarization interference term;

calculating an in-phase child MZM error signal, based on the interference signal between a quadrature-phase child MZM error
signal and an X polarization parent MZM error signal;

updating an in-phase child MZM DC-bias set point to minimize the in-phase child MZM error signal;
calculating the quadrature-phase child MZM error signal, based on the interference signal between the in-phase child MZM error
signal and the X polarization parent MZM error signal;

updating a quadrature-phase child MZM DC-bias set point to minimize the quadrature-phase child MZ error signal;
calculating the X polarization parent MZM error signal, based on the interference signal between the in-phase child MZM error
signal and the quadrature-phase child MZM error signal; and

updating a parent MZM DC-bias set point to minimize the X polarization parent MZM error signal.

US Pat. No. 9,918,416

ELECTROMAGNETIC INTERFERENCE SHIELD

FINISAR CORPORATION, Sun...

1. An electromagnetic interference (“EMI”) shield, comprising:
a first shield section configured to be positioned on a first portion of an optical subassembly including a laser; and
a second shield section configured to be positioned on a second portion of the optical subassembly, wherein the laser of the
optical assembly is located between the first shield section and the second shield section,

wherein:
the first shield section is configured to contact the second shield section such that the first shield section and the second
shield section are held in place when the first shield section and the second shield section are positioned, respectively,
on the first portion and the second portion of the optical subassembly,

the first shield section includes a first base and a first pair of arms located on the first base, the first pair of arms
being configured to be at least partially positioned on opposite sides of the optical subassembly,

the second shield section includes a second base and a second pair of arms located on the second base, the second pair of
arms being configured to be at least partially positioned on the opposite sides of the optical subassembly,

the first shield section further includes a first pair of flanges located on the first base, the first pair of flanges configured
to be at least partially positioned on a front and a back of the optical subassembly, and

the second shield section further includes a second pair of flanges located on the second base, the second pair of flanges
configured to be at least partially positioned on the front and the back of the optical subassembly,

the first shield section further includes a first plurality of fingers located on the first pair of arms, the first plurality
of fingers being positioned over the first pair of flanges, and

the second shield section further includes a second plurality of fingers located on the second pair of arms, the second plurality
of fingers being positioned over the second pair of flanges.

US Pat. No. 9,172,473

ACTIVE LINEAR AMPLIFIER INSIDE TRANSMITTER MODULE

FINISAR CORPORATION, SUN...

1. A transmitter module comprising:
a buffer circuit including a differential amplifier configured to receive a differential signal including a first input signal
and a second input signal complementary to the first input signal and to output a single-ended signal on an output node;

a bias circuit coupled to the buffer circuit, the bias circuit including a thermal chirp compensation circuit;
an amplifier circuit coupled to the output node and configured to linearly amplify the single-ended signal; and
an optical transmitter coupled to the amplifier circuit and configured to be driven by the amplified single-ended signal.

US Pat. No. 9,854,687

MULTI-LAYER SUBSTRATES INCLUDING THIN FILM SIGNAL LINES

FINISAR CORPORATION, Sun...

1. A header subassembly comprising:
a multi-layer substrate including:
a bottom layer;
a top layer having top thin film signal lines; and
one or more intermediate layers having thick film traces between the top layer and the bottom layer, the thick film traces
being electrically coupled to the top thin film signal lines; and

optoelectronic components positioned over the multi-layer substrate and electrically coupled with the top thin film signal
lines;

wherein at least one of the top thin film signal lines comprises:
titanium (Ti) having a height of about 0.1 microns with a tolerance of 0.05 microns;
palladium (Pd) having a height of about 0.2 microns with a tolerance of 0.05 microns; or
gold (Au) having a height about 3 microns with a tolerance of 2 microns.

US Pat. No. 9,379,709

SIGNAL CONVERSION

FINISAR CORPORATION, Sun...

1. A circuit, comprising:
an output terminal;
an input terminal configured to receive an input signal with a first voltage swing;
a first transistor including a first gate terminal, a first source terminal, and a first drain terminal;
a second transistor including a second gate terminal, a second source terminal, and a second drain terminal, the second drain
terminal coupled to the output terminal and the second source terminal coupled to a first voltage;

a third transistor including a third gate terminal, a third source terminal, and a third drain terminal, the third drain terminal
coupled to the output terminal, the third source terminal coupled to a second voltage, and the third gate terminal coupled
to the first drain terminal; and

a control circuit coupled to the input terminal, the first gate terminal, and the second gate terminal, the control circuit
configured to adjust voltages provided to the first gate terminal and the second gate terminal based on the input signal such
that the second transistor conducts in response to the input signal being at a first logical level and the third transistor
conducts in response to the input signal being at a second logical level to generate an output signal output on the output
terminal, wherein a second voltage swing of the output signal is different from the first voltage swing of the input signal,
the output signal is a first signal of a complementary metal-oxide semiconductor differential signal, and the input signal
is a first signal of a current-mode-logic differential signal.

US Pat. No. 9,407,376

POLARIZATION DEMULTIPLEXING OF OPTICAL SIGNALS

FINISAR CORPORATION, Sun...

1. An optical receiver comprising:
a polarization beam splitter (PBS) configured to split a received optical signal having an unknown polarization state into
two orthogonal polarizations (x?-polarization and y?-polarization);

a polarization controller configured to have a non-endless polarization tracking, wherein:
the polarization controller includes only two couplers and only two phase shifters per wavelength channel of the x?-polarization
and the y?-polarization,

the polarization controller is configured to demultiplex the x?-polarization and the y?-polarization into a first demultiplexed
signal having a first polarization on which a data signal is modulated and a second demultiplexed signal having a second polarization
that is orthogonal to the first polarization,

a first phase shifter of the two phase shifters is configured to be reset when a first phase rotation angle exceeds a range
of about 0 to about 2?, and

a second phase shifter of the two phase shifters is configured to maintain a second phase rotation angle between about 0 and
about ?; and

a forward error correction (FEC) decoder module configured to correct a burst of errors resulting from resetting one of the
phase shifters based on error correction code (ECC) data encoded in the data signal.

US Pat. No. 9,860,972

ELECTRICAL CONNECTION INTERFACE FOR CONNECTING ELECTRICAL LEADS FOR HIGH SPEED DATA TRANSMISSION

FINISAR CORPORATION, Sun...

1. An electrical connection interface for electrically coupling a printed circuit board to an electro-optical engine, the
electrical connection interface comprising:
a first ground plane layer associated with the printed circuit board;
a second ground plane layer associated with the electro-optical engine;
a first substrate associated with the printed circuit board, the first substrate having a first substrate conductive lead
with a first interface region connected to and electrically insulated from the first ground plane layer; and

a second substrate associated with the electro-optical engine, the second substrate having a second substrate conductive lead
with a second interface region connected to the first interface region of the first substrate conductive lead, the second
substrate conductive lead connected to and electrically insulated from the second ground plane layer;

wherein the second ground plane layer associated with the electro-optical engine includes clearance; and
wherein the first ground plane layer overlaps the second ground plane layer and a dimension of the clearance corresponds to
a distance that the first ground plane layer overlaps the second ground plane layer.

US Pat. No. 9,900,982

BUTTONED SOLDERING PAD FOR USE WITH FINE-PITCH HOT BAR SOLDERING

Finisar Corporation, Sun...

1. A buttoned soldering pad system comprising:
a first soldering pad having a first surface and a second surface; and
a plurality of first button heads protruding from a first surface of the soldering pad, the plurality of first button heads
each being spaced apart from each other;

a center substrate having a first side and a second side;
the soldering pad having the second surface of the soldering pad located on the first side of the center substrate;
a second soldering pad having a plurality of second button heads protruding from a first surface of the second soldering pad,
the plurality of second button heads each being spaced apart from each other and aligned with a corresponding first button
head, a second surface of the second soldering pad being located on the second side of the center substrate, the first side
of the center substrate being opposite of the second side of the center substrate such that the first buttons protrude in
a direction opposite from the second buttons; and

a button core member extending between the aligned first button head and second button head, the button core being thermally
and electronically conductive.

US Pat. No. 10,111,343

METHOD OF FORMING MICRO VIA IN PRINTED CIRCUIT BOARD

FINISAR CORPORATION, Sun...

1. A method of forming at least one micro via in a printed circuit board (PCB), the method comprising:forming a through hole in a PCB substrate of the PCB;
positioning a pillar that is electrically conductive within the through hole;
prior to positioning the pillar within the through hole, coupling an alignment mask to the PCB substrate, the alignment mask including an opening aligned with the through hole through which the pillar is inserted into the through hole;
providing a spacer layer between the alignment mask and the PCB substrate;
cutting through a portion of the spacer layer to remove a portion of the pillar extending beyond a first surface of the PCB substrate or beyond an opposing second surface of the PCB substrate; and
subsequent to positioning the pillar, backfilling the through hole around the pillar with an epoxy backfill.

US Pat. No. 9,525,448

SNAP-MOUNTED AND PLUGGABLE OPTOELECTRONIC MODULE

FINISAR CORPORATION, Sun...

16. A snap-mountable optoelectronic module comprising:
a frame that includes four or more post blocks that each define a module latch receiver;
a cover that is configured to at least partially enclose an inner assembly and that includes a plurality of module latch recesses;
and

a plurality of module latches that each includes pivots and a latch portion, wherein the pivots are received in the module
latch receivers such that the plurality of module latches are configurable in an unlatched position in which the latch portions
are disengaged from the module latch recesses and are configurable in a latched position in which the latch portions are engaged
with the module latch recesses to retain the cover relative to the frame.

US Pat. No. 9,485,018

OPTICAL SOURCE MONITORING SYSTEM

FINISAR CORPORATION, Sun...

1. An optical transmission device comprising:
a first optical source configured to transmit a first channel of light having a power level that is not known;
a first collimator lens configured to collimate the first channel of light and to reflect a portion of the first channel of
light as a first reflected channel of light, wherein the first reflected channel of light is a Fresnel reflection from the
first collimator lens;

a first optical monitor arranged to receive at least a first portion of the first reflected channel of light directly from
the first collimator lens, and configured to communicate a first gross calibration electrical signal representative of received
light including the first portion of the first reflected channel of light;

a second optical monitor arranged to receive a second portion of the first reflected channel of light directly from the first
collimator lens and configured to communicate a second gross calibration electrical signal representative of received light
including the second portion of the first reflected channel of light; and

a controller configured to calculate a first coefficient and a second coefficient from the first gross calibration electrical
signal and the second gross calibration electrical signal,

wherein the first gross calibration electrical signal, the second gross calibration electrical signal, the first coefficient,
and the second coefficient are defined according to equations:

a1RL1=CSRL11;

a2RL1=CSRL12; and

a1+a2=1; in which:

CSRL11 represents the first gross calibration electrical signal;

CSRL12 represents the second gross calibration electrical signal;

RL1 represents the first reflected channel of light; and

a1 and a2 represent the first coefficient and the second coefficient, respectively.

US Pat. No. 9,551,847

LATCH MECHANISM FOR COMMUNICATION MODULE

FINISAR CORPORATION, Sun...

1. A latch comprising:
a follower including a follower opening configured to receive a post of a housing: the post of the housing including a partially
cylindrical portion including a flat surface and a flange configured to maintain a driver on the post; and

the driver including: a driver opening including a slot portion and a rounded portion wider than the slot portion, the driver
opening configured to receive the post of the housing such that the driver is selectively rotatable relative to the post,
the slot portion sized to receive the partially cylindrical portion of the post when in an aligned orientation relative to
the flat surface and not to receive the partially cylindrical portion of the post when not in the aligned orientation relative
to the flat surface; and

an interfacing finger positioned to be received by the follower opening, wherein the interfacing finger is configured to urge
the follower to slidingly move relative to the housing as the driver is rotated relative to the post.

US Pat. No. 9,204,537

HIGH-SPEED PLUGGABLE RIGID-END FLEX CIRCUIT

FINISAR CORPORATION, Sun...

15. An optoelectronic module comprising:
an optical transmitter;
an optical receiver;
an edge connector configured to form a pluggable conductive connection for the optoelectronic module with a host device, the
edge connector disposed on a rigid section of a circuit configured to electrically couple the optical transmitter and optical
receiver with the edge connector, the circuit including:

a flexible section including a first portion of a flexible insulating layer;
a rigid section including:
a second portion of the flexible insulating layer,
a first rigid insulating layer disposed on a first side of the second portion of the flexible insulating layer, and
a second rigid insulating layer disposed on a second side of the second portion of the flexible insulating layer;
an electrically conductive signal transmission line electrically coupled to the edge connector, the electrically conductive
signal transmission line including:

a first signal trace having a root mean square surface roughness equal to or below 20 micrometers, and
a filled signal via configured to pass through at least a portion of the rigid insulating layer;
a transition between the flexible section and the rigid section, the transition including fillets of pliable materials at
the junction of the flexible section and the rigid section; and

a printed passive component coupled to the electrically conductive signal transmission line, the printed passive component
formed at least in part from a geometry of a signal trace in the rigid section or the flexible section,

wherein the flexible insulating layer and the rigid insulating layer have a dissipation factor equal to or below 0.004 and
a dielectric constant equal to or below 3.7.

US Pat. No. 9,197,456

BLIND EQUALIZATION TAP COEFFICIENT ADAPTATION IN OPTICAL SYSTEMS

FINISAR CORPORATION, Sun...

1. A method of blind tap coefficient adaptation in an optical system, the method comprising:
receiving a digital data signal including random digital data;
equalizing a first portion of the digital data signal using a first set of predetermined tap coefficients to generate a first
portion of an equalized signal;

generating a first eye diagram from the first portion of the equalized signal output from an equalizer;
equalizing a second portion of the digital data signal using a second set of predetermined tap coefficients to generate a
second portion of the equalized signal;

generating a second eye diagram from the second portion of the equalized signal output from the equalizer;
comparing the first eye diagram with the second eye diagram;
determining based on the comparison which of the first set of predetermined tap coefficients or the second set of predetermined
tap coefficients results in the digital data signal having a higher signal quality; and

inputting to the equalizer as an initial set of tap coefficients, the first set of predetermined tap coefficients or the second
set of predetermined tap coefficients according to the determination.

US Pat. No. 9,405,066

TWO-STAGE ADIABATICALLY COUPLED PHOTONIC SYSTEMS

FINISAR CORPORATION, Sun...

1. A coupled system comprising;
a first waveguide having a first refractive index n1 and a tapered end;
at least one second waveguide, each having a second refractive index n2;
an interposer comprising a third waveguide having a third refractive index n3 and a coupler portion, wherein:
the tapered end of the first waveguide is adiabatically coupled to a coupler portion of one of the at least one second waveguide;
a tapered end of one of the at least one second waveguide is adiabatically coupled to the coupler portion of the third waveguide
of the interposer;

n1>n2>n3; and
the coupled system is configured to adiabatically couple light between the first waveguide and the at least one second waveguide
and between the at least one second waveguide and the third waveguide.

US Pat. No. 9,172,209

RESISTIVE HEATING ELEMENT FOR ENABLING LASER OPERATION

FINISAR CORPORATION, Sun...

1. An optical transceiver, the optical transceiver comprising:
a ROSA, wherein the ROSA is configured to receive an optical signal and convert the optical signal into an electrical signal;
a transimpedance amplifier, wherein the transimpedance amplifier is configured to amplify the electrical signal produced by
the ROSA;

a TOSA, wherein the TOSA includes is configured to receive an electrical signal and produce an optical signal and wherein
the TOSA includes a laser package configured to produce the optical signal;

an ambient temperature sensor configured to measure an ambient temperature external to the TOSA;
the laser package comprising:
a substrate;
a laser mounted and disposed on a first side of the substrate, wherein the laser includes a lower operating temperature and
a upper operating temperature and the laser is configured to operate within certain parameters if the temperature of the laser
is between the lower operating temperature and the upper operating temperature;

a laser driver mounted on the substrate;
a resistive heating element disposed on the first side of the substrate, wherein the resistive heating element is monolithically
integrated with the laser, the resistive heating element providing a 1° C. temperature increase for every 10 mW of electrical
power;

a laser package temperature sensor, wherein the laser package temperature sensor is configured to detect the temperature of
the laser package; and

control circuitry operably coupled to the resistive heating element, wherein the control circuitry is configured to energize
the resistive heating element with constant current based on the ambient temperature external to the TOSA, wherein energizing
the resistive heating element with constant current causes the temperature of the laser to increase by a predetermined fixed
temperature increase; and

wherein the resistive heating element has two operational states as follows:
if the ambient temperature external to the TOSA is above the lower operating temperature, the control circuitry does not provide
a current to the resistive heating element; and

if the ambient temperature external to the TOSA is below the lower operating temperature, the control circuitry provides a
constant current to the resistive heating element so as to cause the predetermined fixed temperature increase.

US Pat. No. 9,772,467

HERMETICALLY SEALING AN OPTICAL SUBASSEMBLY

FINISAR CORPORATION, Sun...

1. An optical subassembly (OSA) box comprising:
an electrical interface configured to carry electrical signals to one or more electrical components of a transmitting optical
subassembly (TOSA) or a receiving optical subassembly (ROSA);

an optical opening configured to allow optical signals to enter or leave the OSA box;
a rim within the optical opening; and
a transistor-outline can (TO-can) assembly cap including a flange portion, the TO-can assembly cap at least partially recessed
within the rim and the flange portion welded to the rim within the optical opening such that the TO-can assembly cap hermetically
seals the optical opening and allows optical signals to pass through the optical opening via the TO-can assembly cap.

US Pat. No. 9,686,862

CAPACITORS FOR MULTILAYER PRINTED CIRCUIT BOARDS

FINISAR CORPORATION, Sun...

1. A filter capacitor, a bypass capacitor, or a decoupling capacitor in a multilayer printed circuit board comprising:
a via of a via-in-pad type that is disposed directly under an integrated circuit (IC) contact pad of the multilayer printed
circuit board, wherein the via includes a via contact pad with a first size that matches a second size of the IC contact pad;
and

a dielectric mixture filled in the via, wherein:
the dielectric mixture includes a nanoparticle-sized dielectric powder mixed with an adhesive material;
individual dielectric particles of the nanoparticle-sized dielectric powder are between about 1 and 100 nanometers in size;
and

individual dielectric particles in the dielectric mixture do not exceed about 100 nanometers in size;
wherein the filter capacitor, the bypass capacitor, or the decoupling capacitor is configured to filter or shunt signals at
frequencies of 25 gigahertz (GHz) and higher.

US Pat. No. 9,306,546

INTEGRATED POWER SUPPLY FOR FIBER OPTIC COMMUNICATION DEVICES AND SUBSYSTEMS

FINISAR CORPORATION, Sun...

1. An optical assembly configured for use in fiber optic communication devices, the optical assembly comprising:
an integrated circuit (IC) mounted to a substrate, the IC being constructed using an orthogonal gate extended drain complementary
metal-oxide-semiconductor (OG EDCMOS) technology, the IC including:

an inverter that includes an integrated power supply, the integrated power supply including:
a filter configured to convert a source signal to an output signal of the integrated power supply, the filter including an
IC passive component located in the IC and a substrate integrated passive component located in the substrate;

an active switch configured to control an entry of the source signal to the filter; and
a pulse width modulator (“PWM”) configured to generate a PWM output signal that triggers the active switch,
wherein a first capacity of the IC passive component and a second capacity of the substrate integrated passive component are
configured based on a frequency of the PWM output signal and a current of the source signal; and

other integrated components configured to receive the output signal from the filter and operate based on the output signal,
the other integrated components including an integrated high-voltage driver, a modulator bias source, an active bias tee,
a negative power supply, a clock and data recovery circuit, a post amplifier, an analog-to-digital converter, a microcontroller,
and a digital-to-analog converter that are integrated into the same IC using the OG EDCMOS technology.

US Pat. No. 9,097,908

REINFORCED MULTI-BODY OPTICAL DEVICES

FINISAR CORPORATION, Sun...

1. A method for fabricating a reinforced multi-body optical device, the method comprising:
applying a coating to either side of an interior plate;
a first bonding, using heat and pressure, bonding two plates to either side of the interior plate;
dicing the bonded plates at an angle that is not orthogonal to the bonded plates;
removing top and bottom portions of a diced section to form a multi-body polarization beam splitter (PBS) having a generally
rectangular perimeter;

a second bonding, using heat and pressure, bonding a supporting plate to the multi-body PBS to form a reinforced multi-body
PBS, wherein the supporting plate has a CTE that is within about 0.5 parts per million of the CTE of the multi-body PBS; and

grinding the multi-body PBS to reduce the thickness of the multi-body PBS.

US Pat. No. 9,654,848

POLARIZATION DIVERSE WAVELENGTH SELECTIVE SWITCH

Finisar Corporation, Hor...

1. An optical signal manipulation system including:
a plurality of ports that carry respective optical beams to be manipulated, each optical beam including a plurality of independent
wavelength channels, the ports being divided into a first group of ports that carry a first subset of beams corresponding
to a first optical device and a second group of ports that carry a second subset of beams corresponding to a second optical
device;

a polarizing module for polarizing the first subset of beams into a first polarization state and for polarizing the second
subset of beams into a second polarization state orthogonal to the first polarization state;

a wavelength dispersion element that spatially separates the plurality of independent wavelength channels of the first and
second subsets of beams in the direction of a first dimension to produce a plurality of dispersed wavelength channels;

a separation element that spatially separates the plurality of dispersed wavelength channels of the first and second subsets
of beams in the direction of a second dimension orthogonal to the first dimension; and

a processing device including a series of independent wavelength processing elements that separately process each of the dispersed
wavelength channels of the first and second subsets of beams, with wavelength channels of the first subset of beams being
processed independently of wavelength channels of the second subset of beams at a location spatially separated in the second
dimension.

US Pat. No. 9,515,746

OPTICALLY ENABLED MULTI-CHIP MODULES

FINISAR CORPORATION, Sun...

1. An optically enabled multi-chip module comprising:
at least one optical engine transceiver including:
an optical engine front-end comprising:
a plurality of laser diodes;
laser driver circuitry electrically interfaced with each of the plurality of laser diodes;
a plurality of photodiodes;
amplifier circuitry electrically interfaced with each of the plurality of photodiodes; and
at least one optical element optically positioned between the plurality of laser diodes and at least one optical fiber and
between the plurality of photodiodes and the at least one optical fiber, wherein the at least one optical element optically
interfaces the plurality of laser diodes and photodiodes with the at least one optical fiber; and

an optical engine macro that is both electrically interfaced with and physically segregated from the optical engine front-end,
wherein the optical engine macro provides a subset of optical transceiver functionality to the optical engine front-end; and

at least one host system chip electrically interfaced with the at least one optical engine transceiver.

US Pat. No. 9,310,420

PIXEL TEST IN A LIQUID CRYSTAL ON SILICON CHIP

FINISAR CORPORATION, Sun...

1. A continuity testing method of a pixel in a liquid crystal on silicon integrated circuit including a pixel continuity testing
system having a plurality of pixels, each of the plurality of pixels includes an NMOS/PMOS complementary switch and a metal
insulator-metal (MIM) capacitor, the method comprising:
writing a first voltage to a first pixel of the plurality of pixels, the writing the first voltage including closing a first
pixel switch that selectively couples the first pixel to a wire and closing a yank up switch that couples the wire to a first
voltage source such that a voltage of the first voltage source is applied through the yank up switch to the first pixel via
the first pixel switch;

isolating the first pixel;
discharging a wire that is selectively coupled to the first pixel via the first pixel switch;
enabling a sensing amplifier configured to sense voltages on the wire;
electrically coupling the first pixel to the wire while isolating the wire from all other pixels of the plurality of pixels;
and

sensing a resultant voltage on the wire.

US Pat. No. 9,794,017

SWDM OSAS

Finisar Corporation, Sun...

1. An N-channel wavelength division multiplexing or demultiplexing (WDM) optical subassembly (OSA), comprising:
a plurality of active optical devices coupled to a carrier;
an optical block positioned above the plurality of active optical devices and coupled to the carrier, wherein the optical
block includes:

a bottom with a plurality of lenses formed in the bottom that are aligned with the plurality of active optical devices;
a first side that extends up from the bottom;
a second side that extends up from the bottom and is opposite the first side;
a port that extends forward from the bottom and the first and second sides; and
an optical block cavity defined by the bottom and the first and second sides that extends rearward from the port; and
a wavelength division multiplexer (MUX) or a wavelength division demultiplexer (DEMUX) positioned in the optical block cavity
in an optical path between the port of the optical block and the plurality of active optical devices, the MUX or the DEMUX
comprising:

a first thin film filter positioned above a first of the plurality of active optical devices and a first of the plurality
of lenses;

a second thin film filter positioned above a second of the plurality of active optical devices and a second of the plurality
of lenses;

a third thin film filter positioned above a third of the plurality of active optical devices and a third of the plurality
of lenses; and

a mirror positioned in the optical path between the port of the optical block and a fourth of the plurality of active optical
devices above the fourth of the plurality of active optical devices and a fourth of the plurality of lenses.

US Pat. No. 9,671,611

OPTICAL CELL WITH WAVELENGTH COMPENSATOR

FINISAR CORPORATION, Sun...

1. An optical cell comprising:
a first port coupled to a second port by first and second optical paths; and
a first compensator disposed in the first optical path, the first compensator rotatable about a first axis, wherein rotating
the first compensator about the first axis varies a distance that the first optical path passes through the first compensator
thereby changing a length of the first optical path.

US Pat. No. 9,857,541

COMPONENT ALIGNMENT

FINISAR CORPORATION, Sun...

1. A system comprising:
a substrate including a plurality of pads and a plurality of solder protuberances, each solder protuberance of the plurality
of solder protuberances located on an associated pad of the plurality of pads;

a lens component defining a groove having a continuous, substantially rectangular shape, the groove sized to receive at least
a portion of each solder protuberance of the plurality of solder protuberances, the lens component positioned relative to
the substrate such that at least a portion of each solder protuberance of the plurality of solder protuberances is positioned
within the groove; and

epoxy located within the groove.

US Pat. No. 9,847,776

MULTI-RATE CLOCK BUFFER

FINISAR CORPORATION, Sun...

1. A circuit comprising:
a driver circuit configured to receive a clock signal and to output a modified clock signal based on the received clock signal,
the modified clock signal being configured to drive a load circuit;

a first tuned circuit electrically coupled to the driver circuit and including one or more components configured with respect
to the driver circuit and the load circuit such that the first tuned circuit and the driver circuit are collectively tuned
according to a first frequency range, the first tuned circuit configured to be active when a rate of the clock signal is within
the first frequency range and configured to be inactive when the rate of the clock signal is outside of the first frequency
range, wherein the first tuned circuit includes:

a first tuning element electrically coupled to an output terminal of the driver circuit, wherein the output terminal is configured
to output the modified clock signal, wherein the first tuning element includes one or more of: a resistor and an inductor;
and

a first transistor electrically coupled between the first tuning element and a supply voltage without another tuning element
being coupled between the first transistor and the supply voltage, the first transistor being configured to receive a first
control signal configured to turn the first transistor on when the rate of the clock signal is within the first frequency
range and to turn the first transistor off when the rate of the clock signal is outside of the first frequency range, wherein
the first tuned circuit is active when the first transistor is on and is inactive when the first transistor is off; and

a second tuned circuit electrically coupled to the driver circuit and including one or more components configured with respect
to the driver circuit and the load circuit such that the second tuned circuit and the driver circuit are collectively tuned
according to a second frequency range that is different from the first frequency range, the second tuned circuit configured
to be active when the rate of the clock signal is within the second frequency range and configured to be inactive when the
rate of the clock signal is outside of the second frequency range, wherein the second tuned circuit includes:

a second tuning element electrically coupled to the output terminal; and
a second transistor electrically coupled between the second tuning element and the supply voltage, the second transistor being
configured to receive a second control signal configured to turn the second transistor on when the rate of the clock signal
is within the second frequency range and to turn the second transistor off when the rate of the clock signal is outside of
the second frequency range, wherein the second tuned circuit is active when the second transistor is on and is inactive when
the second transistor is off.

US Pat. No. 9,814,153

INTERCONNECT STRUCTURE FOR COUPLING AN ELECTRONIC UNIT AND AN OPTICAL UNIT, AND OPTOELECTRONIC MODULE

FINISAR CORPORATION, Sun...

1. An optoelectronic module, comprising:
an electronic unit outputting and/or receiving electric signals;
an optical unit for converting the electric signals into optical signals;
an interconnect structure connecting the electronic unit and the optical unit, the interconnect structure comprising an electrically
conducting substrate and a pair of transmission leads connecting the electronic unit and the optical unit and having a signal
lead and a ground lead having lower impedance than the signal lead; and

a second electronic unit processing electric signals generated by the optical unit.

US Pat. No. 9,520,662

LATCHING MECHANISMS FOR PLUGGABLE ELECTRONIC DEVICES

FINISAR CORPORATION, Sun...

1. A host device comprising:
a host connector connected to a host printed circuit board, the host connector sized and shaped to receive and electrically
connect to an edge connector of a printed circuit board of a pluggable electronic device; and

a host cage connected to the host printed circuit board and shaped to at least partially surround the host connector, the
host cage also sized and shaped to at least partially receive the pluggable electronic device, the host cage including a pair
of inwardly biased leaf springs that extend toward the host connector;

wherein the host connector comprises a hard stop for the pluggable electronic device such that the pluggable electronic device
abuts the host connector to prevent the pluggable electronic device from being inserted further into the host cage;

wherein the hard stop includes an upper face and a lower face of the host connector, the upper face and the lower face defining
a slot sized and shaped to receive the edge connector of the printed circuit board, the slot positioned between the upper
face and the lower face, the upper face and the lower face positioned to abut the pluggable electronic device when the edge
connector of the printed circuit board is positioned in the slot; and

conductive pads, the conductive pads positioned entirely in the slot between the upper face and the lower face.

US Pat. No. 9,184,850

METHOD OF MONITORING AN OPTOELECTRONIC TRANSCEIVER WITH MULTIPLE FLAG VALUES FOR A RESPECTIVE OPERATING CONDITION

Finisar Corporation, Sun...

1. A circuit for monitoring operation of an optoelectronic transceiver, which includes a laser transmitter and a photodiode
receiver, said circuit comprising:
analog to digital conversion circuitry configured to convert at least two analog signals corresponding to operating conditions
of said optoelectronic transceiver into a first digital value corresponding to a first operating condition and a second digital
value corresponding to a second operating condition;

memory configured to store the first digital value in a first memory location that is mapped to a predefined and unique first
address and to store the second digital value in a second memory location that is mapped to a predefined and unique second
address, wherein the first address and second address are known to a host external to the optoelectronic transceiver; and

an interface configured to enable the host to access the first digital value using the first address and to access the second
digital value using the second address.

US Pat. No. 9,158,072

MULTICAST OPTICAL SWITCH

Finisar Corporation, Hor...

1. An optical switch configured to switch optical beams between one or more first ports and two or more second ports, said
switch including:
a wavelength independent beam splitter to simultaneously split said optical beams from each of said first ports into a plurality
of separate sub beams; and

a reflective wavelength independent switching unit to selectively reflectively direct each said sub beam along respective
predetermined trajectories such that predetermined sub beams are coupled between said first and second ports, said switching
unit including one independently switchable reflective element corresponding to each said second port, each said switchable
reflective element being switchable between a plurality of preselected switching states, each said switching state defining
a trajectory of each said sub beam;

wherein said beam splitter and said switching unit are configured to direct said sub beams along substantially free space
trajectories unconfined to waveguides.

US Pat. No. 9,887,782

RAPID OUT-OF-BAND SIGNAL COMMUNICATION IN OPTICAL COMPONENTS

FINISAR CORPORATION, Sun...

1. An optoelectronic module configured to transmit out-of-band (OOB) data represented by average optical power differences
between two or more optical signals, the optoelectronic module comprising:
a first optical source configured to generate a first optical signal including first channel payload data on a first optical
channel;

a second optical source configured to generate a second optical signal including second channel payload data on a second optical
channel, the second optical channel being independent of the first optical channel, the first optical source includes a first
laser or a first light-emitting diode (LED), and the second optical source includes a second laser or a second LED; and

an optical power control device that includes a modulator, wherein the optical power control device is configured to control
an optical power of the first optical source, an optical power of the second optical source, or optical powers of both the
first optical source and the second optical source for transmission of a first bit of the OOB data as an OOB differential
signal via the first optical channel and the second optical channel, the first bit of the OOB data being represented by an
average optical power difference between the first optical signal and the second optical signal, and the modulator is configured
to modulate the optical power of the first optical signal transmitted by the first laser or the first LED and the optical
power of the second optical signal transmitted by the second laser or the second LED.

US Pat. No. 9,590,799

CLOCK RECOVERY AND EQUALIZER ESTIMATION IN A MULTI-CHANNEL RECEIVER

FINISAR CORPORATION, Sun...

1. A method of performing clock recovery and equalizer coefficient estimation in a multi-channel receiver, the method comprising:
recovering, at a first clock recovery unit, a first clock signal associated with a first channel;
estimating a first set of coefficients for a first equalizer associated with the first channel using the first clock signal;
passing the first clock signal from the first clock recovery unit to a second clock recovery unit associated with a second
channel;

recovering, at the second clock recovery unit, a second clock signal associated with the second channel using the first clock
signal as a reference clock signal to the second clock recovery unit;

passing the first set of coefficients as first initialization coefficients to a second equalizer associated with the second
channel; and

estimating a second set of coefficients for the second equalizer using the first initialization coefficients.

US Pat. No. 9,178,684

SELF-TESTING INTEGRATED CIRCUITS

FINISAR CORPORATION, Sun...

1. A method of self-testing an integrated circuit (IC) that includes N channels i, where i is an integer from 1 to N, the
method comprising:
selectively coupling the channels i in a daisy chain;
receiving a reference clock signal at a first clock and data recovery circuit (CDR) included in channel 1;

verifying, by the first CDR, CDR functionality of the first CDR using the reference clock signal;
generating, by a first pseudorandom bit stream (PRBS) generator circuit included in channel 1, a PRBS signal_1 using a recovered clock signal recovered by the first CDR;

outputting, by the first PRBS generator circuit, the PRBS signal_1 to an input of channel 2; and

for i ranging from 2 to N:
verifying, by each channel i, at least some functionality of channel i and at least some functionality of a previous channel
i?1 using a PRBS signal_i?1 received from the previous channel i?1 in the daisy chain;

generating, by a PRBS generator of each channel i, a PRBS signal_i using a recovered clock recovered from the PRBS signal_i?1;
and

outputting, by the PRBS generator of each channel i, the PRBS signal_i to the next channel i+1 in the daisy chain.

US Pat. No. 9,948,401

INDIVIDUAL DC AND AC CURRENT SHUNTING IN OPTICAL RECEIVERS

Finisar Corporation, Sun...

1. An optical receiver comprising:a photodetector configured to:
receive an optical signal;
convert the optical signal into a current signal; and
output the current signal at an amplifier input node;
amplifier circuitry coupled to the amplifier input node and configured to:
receive the current signal at the amplifier input node;
convert the current signal received at the amplifier input node to a voltage signal; and
output the voltage signal at an amplifier output node; and
overload circuitry coupled to the amplifier input node and configured to:
receive a replica DC input voltage at a first overload node, wherein the replica DC input voltage corresponds to a DC input voltage at the amplifier input node;
receive a replica DC output voltage at a second overload node, wherein the replica DC output voltage corresponds to a DC output voltage at the amplifier output node;
detect that a DC component of the current signal exceeds a first threshold level based on the replica DC input voltage and the replica DC output voltage;
direct DC current of the current signal through a DC shunt path in response to and based on detecting that the DC component of the current signal exceeds the first threshold level; and
direct AC current of the current signal through an AC shunt path in response to and based on detecting that shunted DC current passing through the DC shunt path exceeds a second threshold level, wherein the AC shunt path is different from the DC shunt path.

US Pat. No. 9,848,498

OPTOELECTRONIC SUBASSEMBLY WITH COMPONENTS MOUNTED ON TOP AND BOTTOM OF SUBSTRATE

FINISAR CORPORATION, Sun...

1. A header subassembly comprising:
a substrate with a substrate top and a substrate bottom;
an optoelectronic transducer on the substrate top;
at least one top electrical component on the substrate top, the top electrical component operably coupled with the optoelectronic
transducer;

a housing coupled to the substrate top and hermetically sealing the top electrical component and the optoelectronic transducer
between the housing and the substrate top and

a controller coupled to the substrate bottom and located outside of the housing, the controller operably coupled with the
optoelectronic transducer and configured to send and receive control signals to the at least one top electrical component
and optoelectronic transducer.

US Pat. No. 9,831,631

DIRECTLY MODULATED LASER FOR PON APPLICATION

Finisar Corporation, Sun...

1. A laser comprising:
a gain section comprising:
an active region;
an upper separate confinement heterostructure (SCH) above the active region having a thickness of at least 60 nanometers (nm);
and

a lower SCH below the active region having a thickness of at least 60 nm; and
a gain electrode coupled to the gain section and configured to be coupled to a direct modulation source that is configured
to provide a modulation signal having a data rate of about 10 gigabits per second or higher;

wherein in response to application of the modulation signal to the gain electrode, the laser is configured to generate an
optical signal having a frequency modulation profile exhibiting both transient chirp and adiabatic chirp, and a ratio of transient
chirp to adiabatic chirp is in a range from 1:3 to 1:4.

US Pat. No. 9,625,650

OPTICAL CIRCULATORS INTEGRATED INTO TRANSCEIVERS

FINISAR CORPORATION, Sun...

20. An optical circulator integrated into a transceiver to achieve bi-directional communication in a fiber optic network,
the optical circulator comprising:
a bi-directional propagation core configured to pass a transmission signal in a transmit direction and a received signal in
a receive direction, the bi-directional propagation core including:

a first polarization beam splitter (PBS);
a first polarization shifting assembly optically coupled to the first PBS;
a second PBS optically coupled to the first polarization shifting assembly;
a second polarization shifting assembly optically coupled to the second PBS;
a third PBS optically coupled to the second polarization shifting assembly;
a third polarization shifting assembly optically coupled to the second PBS; and
a fourth PBS optically coupled to the third polarization shifting assembly;
wherein:
the first polarization shifting assembly is located between the first PBS and the second PBS, and the second polarization
shifting assembly is located between the second PBS and the third PBS;

the bi-directional propagation core propagates the received signal from the first PBS to the third PBS through the first polarization
shifting assembly, the second PBS, and the second polarization shifting assembly;

the transmission signal includes an unpolarized light beam;
the fourth PBS splits the unpolarized light beam into a first beam component with a first polarization state and a second
beam component with a second polarization state that is orthogonal to the first polarization state;

the fourth PBS passes the first beam component and the second beam component to the third polarization shifting assembly;
the third polarization shifting assembly maintains the first beam component in the first polarization state and rotates the
second beam component from the second polarization state to the first polarization state;

the second PBS passes the first beam component and the second beam component with the first polarization state to the first
polarization shifting assembly;

the first polarization shifting assembly rotates the first beam component from the first polarization state to the second
polarization state and maintains the second beam component in the first polarization state; and

the first PBS aggregates the first beam component with the second polarization state and the second beam component with the
first polarization state to form an aggregated transmission signal;

an input port optically coupled to the fourth PBS of the bi-directional propagation core, the input port configured to deliver
the transmission signal to the fourth PBS;

an output port optically coupled to the third PBS of the bi-directional propagation core, the output port configured to receive
the received signal from the third PBS; and

a network port optically coupled to the first PBS of the bi-directional propagation core, the network port configured to receive
the aggregated transmission signal from the first PBS and deliver the aggregated transmission signal to a fiber optic cable,
the network port further configured to receive the received signal from the fiber optic cable and deliver the received signal
to the first PBS.

US Pat. No. 9,520,943

COMMUNICATION OVER MULTIMODE AND SINGLE MODE FIBER

FINISAR CORPORATION, Sun...

1. A system for communicating an optical signal, the system comprising:
an optical transmitter including one or more lasers configured to produce a light signal and a transmitter optical sub assembly
(TOSA) receptacle, wherein the TOSA receptacle optically couples the lasers to an optical fiber and launches a quasi-multimode
optical signal (quasi-MM signal) that includes at least one lower order mode optical signal and at least one higher order
mode optical signal onto the optical fiber; and

an optical receiver connected to the optical fiber via a receiver optical sub assembly (ROSA) receptacle, wherein the optical
receiver is configured to receive the quasi-MM signal and to substantially block the at least one higher order mode optical
signal,

wherein the at least one lower order mode optical signal and the at least one higher order mode optical signal included in
the quasi-MM signal are at least partially controlled by a receptacle length of the TOSA receptacle and a core diameter of
the TOSA receptacle.

US Pat. No. 9,507,237

DIFFERENTIAL TWE MZM DRIVER FOR SILICON PHOTONICS

FINISAR CORPORATION, Sun...

19. A differential traveling wave electrode (TWE) Mach-Zehnder-Modulator (MZM) driver, comprising:
a differential driver with a first differential output and a second differential output that collectively form a differential
pair, wherein:

the first differential output is DC coupled to a first arm optical phase shifter of a TWE MZM;
the second differential output is DC coupled to a second arm optical phase shifter of the TWE MZM;
a first capacitor that AC couples the second differential output to the first arm optical phase shifter;
a second capacitor that AC couples the first differential output to the second arm optical phase shifter;
a first termination coupled to the first arm optical phase shifter; and
a second termination coupled to the second arm optical phase shifter.

US Pat. No. 9,203,516

INTELLIGENT BAIL

FINISAR CORPORATION, Sun...

9. A system to provide connectivity information, the system comprising:
an identification device that includes:
an integrated circuit programmed with unique identification information;
a first plurality of contacts communicably coupled to the integrated circuit and configured to be communicably coupled to
an outside identification system to allow the outside identification system to retrieve the unique identification information
from the identification device; and

a plurality of clips configured to mechanically couple the identification device directly to an optoelectronic transceiver
or transponder, wherein the plurality of clips are configured to directly engage a plurality of posts of a line side latch
on a front of the optoelectronic transceiver or transponder to secure the identification device to the optoelectronic transceiver
or transponder, the front of the optoelectronic transceiver or transponder configured to receive an optical connector that
terminates an optical fiber; and

an out-of-band (OOB) device that includes:
a radio frequency identification (RFID) tag;
a second plurality of contacts electrically coupled to the RFID tag and configured to communicably couple the OOB device to
the identification device; and

a housing within which each of the second plurality of contacts is at least partially disposed, the housing configured to
be mechanically coupled to the optical connector that terminates the optical fiber.

US Pat. No. 9,847,840

MULTI-CHANNEL TRANSCEIVER WITH LASER ARRAY AND PHOTONIC INTEGRATED CIRCUIT

FINISAR CORPORATION, Sun...

1. A laser module comprising:
a laser chip having a plurality of laser diodes;
a focusing lens optically coupled to each of the plurality of distinct laser diodes; and
a substrate defining a photonic integrated circuit (PIC) having:
a plurality of optical inlet ports integrated on a surface of the PIC where each individual optical inlet port is optically
coupled to one of the plurality of laser diodes through the focusing lens;

a plurality of waveguides integrated in the PIC where each individual waveguide is coupled to one of the plurality of optical
inlet ports;

a plurality of optical splitters integrated in the PIC where each individual optical splitter is coupled to one of the plurality
of waveguides and each optical splitter splits into two or more optical channels downstream from the individual optical splitter
where each optical channel is integrated in the PIC;

a plurality of modulators integrated in the PIC where each individual modulator is coupled to one of the optical channels;
and

a plurality of output channels integrated in the PIC where each individual output channel is coupled with one of the plurality
of modulators.

US Pat. No. 9,203,522

PHASE LOCK LOOP CONTROL FOR DIGITAL COMMUNICATION SYSTEMS

Finisar Corporation, Hor...

12. A method of receiving an optical data signal, the method comprising:
a. detecting the optical data signal received from an optical channel with an optical detector and generating a received electrical
data signal;

b. establishing a signal locking condition in response to an input signal quality of the received electrical data signal;
c. recovering the data and clock signal if the signal locking condition in response to the input signal quality of the received
electrical data signal is locked;

d. switching from the received electrical data signal to a second electrical data signal with an electrical switch for a predetermined
time if the signal locking condition in response to the input signal quality of the received electrical data signal is unlocked,
the electrical switch having a first input that is electrically coupled to an output of the optical detector and a second
input that is electrically coupled to an electrical data source that generates the second electrical data signal, and an output
that is connected to a data and clock recovery circuit;

e. switching the electrical switch to the received electrical data signal after the predetermined time; and
f. determining in response to the input signal quality of the received electrical data signal if the signal locking condition
is locked.

US Pat. No. 9,167,308

INTEGRATED LASER AND MODULATOR TRANSMITTER FOR CATV APPLICATIONS

Finisar Corporation, Hor...

1. A cable television (CATV) optical transmitter, the optical transmitter comprising:
a) a tunable laser having a phase bias input and a gain bias input, the tunable laser generating an optical carrier beam at
an output;

b) a semiconductor optical amplifier having a bias input and an optical input that is optically coupled to the output of the
tunable laser, the semiconductor optical amplifier amplifying the optical carrier beam generated by the tunable laser;

c) an integrated balanced modulator having an optical input that is connected to output of the semiconductor optical amplifier
and an electrical modulation input that receives analog CATV signals; and

d) a 3rd order pre-distortion circuit having an output that is electrically connected to a modulation input of the integrated balanced
modulator, the 3rd order pre-distortion circuit generating a signal that, when combined with the analog CATV modulation signal, at least partially
cancels third order distortions that are introduced during modulation, the integrated balanced modulator generating a modulated
CATV with reduced 3rd order distortion.

US Pat. No. 9,762,027

BEAM STEERING MODULATED VCSEL

FINISAR CORPORATION, Sun...

1. A VCSEL comprising:
an electro-optic modulator between a lasing active region and a light emitting surface, the electro-optic modulator comprising:
an electro-optically active region;
a modulator mirror region over the electro-optically active region; and
at least one electrical insulator region located in the modulator mirror region separating the modulator mirror region into
at least two separate modulator mirror cavities electrically isolated from each other, wherein each separate modulator mirror
cavity and a longitudinally aligned portion of the electro-optically active region form an electro-optic modulator cavity.

US Pat. No. 9,692,547

OPTICAL WAVELENGTH AUTOMATIC ADAPTATION OF TRANSCEIVERS

FINISAR CORPORATION, Sun...

1. A method comprising:
receiving, at a receiver of a first optoelectronic module, a loss of signal indicator from a second optoelectronic module
that is remote from the first optoelectronic module;

in response to receiving the loss of signal indicator, transmitting, by a transmitter of the first optoelectronic module,
an optical signal on a first wavelength channel towards the second optoelectronic module; and

one of:
in response to the loss of signal indicator persisting, tuning the transmitter to transmit an optical signal on a second wavelength
channel; or

in response to the loss of signal indicator terminating, continuing to transmit the optical signal on the first wavelength
channel.

US Pat. No. 9,658,408

REINFORCED OPTICAL FIBER CABLE

Finisar Corporation, Sun...

1. An optical fiber cable, comprising:
an optical fiber that extends from a first end to a second end, the optical fiber comprising:
a core that extends from the first end to the second end;
a cladding that surrounds the core and extends from the first end to the second end; and
a coating that surrounds the cladding and extends from the first end to the second end; and
a first length of flexible epoxy that surrounds a length of the coating from the first end to a first intermediate point of
the optical fiber,

wherein the first intermediate point is between the first end and the second end;
wherein the first length of flexible epoxy does not extend beyond the first intermediate point of the optical fiber; and
a rigid epoxy that surrounds the lengths of the optical fiber and the flexible epoxy from the first end to a second intermediate
point of the optical fiber, the second intermediate point disposed between the first end and the first intermediate point.

US Pat. No. 9,628,216

DATA COMMUNICATION USING MULTIPLE CHANNELS

FINISAR CORPORATION, Sun...

1. A method of transmitting data through an optical link, the method comprising:
receiving feedback information that includes effective channel bandwidths, signal-to-noise ratios (SNRs) associated with multiple
optical channels on the optical link, and individual SNRs associated with subcarriers on each optical channel;

determining multiple subcarrier power allocation schemes based on the feedback information, wherein each subcarrier power
allocation scheme is associated with a corresponding optical channel from the multiple optical channels and is configured
to allocate a signal power among subcarriers configured to transmit on the corresponding optical channel;

determining, based on the feedback information, an optical power allocation scheme configured to allocate an optical power
among the multiple optical channels; and

transmitting data on the multiple optical channels based on the multiple subcarrier power allocation schemes and the optical
power allocation scheme.

US Pat. No. 9,577,759

METHOD OF MONITORING AN OPTOELECTRONIC TRANSCEIVER WITH MULTIPLE FLAG VALUES FOR A RESPECTIVE OPERATING CONDITION

Finisar Corporation, Sun...

1. A circuit for monitoring operation of an optoelectronic transceiver, which includes a laser transmitter and a photodiode
receiver, said circuit comprising:
analog to digital conversion circuitry configured to convert a first analog signal corresponding to a first operating condition
of said optoelectronic transceiver into a first digital value, and convert a second analog signal corresponding to a second
operating condition of said optoelectronic transceiver into a second digital value;

memory configured to store the first digital value in a first memory location that is mapped to a predefined and unique first
address and to store the second digital value in a second memory location that is mapped to a predefined and unique second
address; and

an interface configured to enable a host external to the optoelectronic transceiver to access the first digital value using
the first address and to access the second digital value using the second address.

US Pat. No. 9,841,568

LATCH MECHANISMS FOR MODULES

FINISAR CORPORATION, Sun...

1. A module comprising:
a housing including a first rib located on a first side of the housing and a second rib located on a second side of the housing;
and

a release slide positioned at least partially on the housing, the release slide including:
a first arm extending from the release slide, the first arm at least partially positioned on the first side of the housing,
the first arm including a first flange positioned at least partially over the first rib; and

a second arm extending from the release slide, the second arm at least partially positioned on the second side of the housing,
the second arm including a second flange positioned at least partially over the second rib, wherein the second flange extends
from the second arm towards the first flange.

US Pat. No. 9,824,552

COMMUNICATION DEVICES INCLUDING AN ILLUMINATION SOURCE AND A PHYSICAL INPUT SENSOR

FINISAR CORPORATION, Sun...

1. An optoelectronic communication device comprising:
a first optoelectronic module including:
a first illumination source;
a first body element configured to allow illumination generated by the first illumination source to propagate within and illuminate
at least a portion of an outer surface of the first body element, and

a sensor configured to detect a physical input applied at the first optoelectronic module;
the first optoelectronic module configured to be optically coupled to an optical cable configured to transmit optical signals
between the first optoelectronic module and a second optoelectronic module.

US Pat. No. 9,618,708

MULTIPLEXER/DEMULTIPLEXER BASED ON DIFFRACTIVE OPTICAL ELEMENTS

Finisar Corporation, Sun...

1. An optical apparatus comprising first and second transmissive diffractive optical elements, wherein:
the first and second diffractive optical elements are held in substantially fixed positions relative to one another;
the first diffractive optical element includes a multiplexed transmission region characterized by a corresponding average
grating-normal vector direction, a corresponding average grating wavevector magnitude, and a corresponding average grating
wavevector direction;

the second diffractive optical element includes multiple demultiplexed transmission regions that are spatially displaced from
one another, each of which is characterized by a corresponding average grating-normal vector direction, a corresponding average
grating wavevector magnitude, and a corresponding average grating wavevector direction;

each demultiplexed transmission region differs from at least one other demultiplexed transmission region with respect to one
or more of the grating-normal vector direction, the grating wavevector magnitude, or the grating wavevector direction;

the relative positions of the first and second diffractive optical elements, the grating-normal vector directions, the grating
wavevector magnitudes, and the grating wavevector directions are such that each one of a set of multiple optical signals,
at corresponding different selected signal wavelengths in an operational wavelength range, co-propagating to the multiplexed
transmission region along a multiplexed beam path would (i) be transmissively, dispersively diffracted by the first diffractive
optical element, (ii) propagate directly, without any intervening reflection, between the multiplexed transmission region
and a corresponding one of the demultiplexed transmission regions different from a demultiplexed transmission region of at
least one other of the multiple optical signals, (iii) be transmissively, dispersively diffracted by the second diffractive
optical element, and (iv) propagate from the corresponding demultiplexed transmission region along a corresponding one of
multiple demultiplexed beam paths.

US Pat. No. 9,612,414

MULTI-CHANNEL OPTOELECTRONIC SUBASSEMBLIES

FINISAR CORPORATION, Sun...

1. A multi-channel optoelectronic subassembly comprising:
a multi-channel header subassembly including a plurality of optoelectronic transducers on a substrate, at least one of the
optoelectronic transducers being configured to transmit and/or receive optical signals corresponding to one channel;

a housing defining a housing cavity and including an optically transmissive portion;
a ferrule assembly retaining optical fibers, the ferrule assembly comprising a cylindrical ferrule body;
a cylindrical alignment sleeve that defines a sleeve cavity, the sleeve cavity sized and shaped to receive the ferrule body
such that the ferrule body is repositionable in a longitudinal direction and a rotational direction with respect to the alignment
sleeve when the ferrule body is positioned inside of the sleeve cavity and wherein the ferrule body extends entirely through
the sleeve cavity.

US Pat. No. 9,804,349

MULTI-LENS OPTICAL COMPONENTS

FINISAR CORPORATION, Sun...

1. An optoelectronic subassembly comprising:
a multi-channel header subassembly comprising:
a substrate; and
optoelectronic components coupled to or formed on the substrate, the optoelectronic components configured to transmit and/or
receive multiple optical signals each corresponding to one channel; and

an optical component coupled to the header subassembly, the optical component comprising:
a circular housing extending between a housing top and a housing bottom, the housing top defining an aperture sized and shaped
to receive a corresponding circular ferrule assembly such that the ferrule assembly is rotatable when positioned at least
partially in the aperture;

a window in the aperture that is at least partially optically transmissive such that the window permits the optical signals
to travel between the ferrule assembly and the header subassembly through the optical component positioned there between;

a lens array including lenses configured to convey the optical signals each corresponding to one channel; and
a cavity defined by the housing and the window, the cavity hermetically sealing portions of the header subassembly.

US Pat. No. 9,686,856

TRANSMISSION LINES

FINISAR CORPORATION, Sun...

1. A circuit comprising:
a first transmission line on a first portion of the circuit including:
a first first-line conductor configured to transport a signal;
a second first-line conductor;
a second transmission line on a second portion of the circuit including:
a first second-line conductor;
a second second-line conductor on the second portion of the circuit electrically coupled to the second first-line conductor
on the first portion of the circuit via a conductive coupler between the first and second portions of the circuit; and

a third second-line conductor separated from and positioned between the first and second second-line conductors, the third
second-line conductor electrically coupled to the first first-line conductor and configured to transport the signal; and

a conductive jumper on the second portion of the circuit that electrically couples the first and second second-line conductors,
wherein the conductive jumper contacts the first and second second-line conductors in a position near the coupling of the
first and second transmission lines.

US Pat. No. 9,575,255

WAVELENGTH DIVISION MULTIPLEXER ARRAY

FINISAR CORPORATION, Sun...

1. A wavelength division multiplexer (WDM) array, the WDM array comprising:
an optical filter;
N common ports positioned to a first side of the optical filter, wherein N is greater than or equal to two;
N reflection ports positioned to the first side of the optical filter; and
N pass ports positioned to a second side of the optical filter opposite the first side;
wherein the N common ports and N pass ports define a first plane that intersects the optical filter along an intersecting
line and the first plane is oriented at an acute, non-zero angle ? relative to a plane of the optical filter.

US Pat. No. 9,577,386

PIN CADENCE FOR HIGH-SPEED CONNECTORS

FINISAR CORPORATION, Sun...

1. A host connector that is configured for communication of data between a host system and a connector, the host connector
comprising:
a plurality of pins having a complementary pinout to that of the connector, the complementary pinout including at least one
functional designation cadence including:

a first ground pin, a first signal pin, a no-connect pin, a second signal pin, and a second ground pin, wherein the first
signal pin is positioned between the first ground pin and the no-connect pin, the no-connect pin is positioned between the
first signal pin and the second signal pin, and the second signal pin is positioned between the no-connect pin and the second
ground pin; or

a first ground pin, a first signal pin, a third ground pin, a second signal pin, and a second ground pin, wherein the first
signal pin is positioned between the first ground pin and the third ground pin, the third ground pin is positioned between
the first signal pin and the second signal pin, and the second signal pin is positioned between the third ground pin and the
second ground pin.

US Pat. No. 9,544,057

INTERCONNECT STRUCTURE FOR E/O ENGINES HAVING IMPEDANCE COMPENSATION AT THE INTEGRATED CIRCUITS' FRONT END

FINISAR CORPORATION, Sun...

1. An interconnect structure for coupling at least one electronic unit for outputting and receiving electric signals relative
to a further electronic component and at least one optical unit for at least one of converting said electric signals into
optical signals and converting said optical signals into electric signals, said interconnect structure comprising:
an electrically insulating substrate and a plurality of signal lead pairs to be coupled between said at least one electronic
unit and a frontend contact region for electrically contacting said interconnect structure by said further electronic component,

said interconnect structure further comprising a ground plane layer which is electrically insulated from said plurality of
signal lead pairs,

wherein each pair of the plurality of signal lead pairs has a circuit connecting region for electrically contacting respective
terminals of said at least one electronic unit,

wherein in a region adjacent to said respective terminals of said at least one electronic unit said ground plane layer has
a plurality of clearances that are each allocated to one pair of the plurality of signal lead pairs and separated from a respective
neighbouring clearance, wherein a ground plane layer web separates at least two signal lead pairs.

US Pat. No. 9,466,943

HEAT-SWAP DEVICE AND METHOD

FINISAR CORPORATION, Sun...

1. A transmitting optical sub-assembly (TOSA) comprising:
a light emitting element;
a plurality of TOSA components;
a plurality of thermal elements thermally associated with the plurality of TOSA components, the plurality of thermal elements
configured to provide a substantially constant heat generation profile and/or temperature profile across the TOSA during a
light emitting element dormant period and a light emitting element firing period;

a controller operably coupled with the one or more thermal elements so as to control the substantially constant heat generation
profile and/or temperature profile; and

wherein the TOSA has a constant heat generation profile and/or temperature profile with respect to the light emitting element
and one or more TOSA components during the light emitting element dormant period and the light emitting element firing period.

US Pat. No. 9,923,636

INTERCONNECT STRUCTURE FOR E/O ENGINES HAVING IMPEDANCE COMPENSATION AT THE INTEGRATED CIRCUITS' FRONT END

Finisar Corporation, Sun...

1. An interconnect structure comprising:
an electrically insulating substrate and a plurality of differential signal lead pairs to be coupled between an electronic
unit and a frontend contact region;

a ground plane layer that is electrically insulated from the plurality of differential signal lead pairs,
wherein each pair of the plurality of differential signal lead pairs has a circuit connecting region configured to electrically
contact respective terminals of the electronic unit,

wherein in a region adjacent to the respective terminals of the electronic unit, the ground plane layer has a plurality of
clearances that are each allocated to one pair of the plurality of differential signal lead pairs and separated from a respective
neighboring clearance, and

wherein a ground plane layer web separates at least two neighboring differential signal lead pairs.

US Pat. No. 9,874,704

FERRULE ASSEMBLIES

FINISAR CORPORATION, Sun...

1. A ferrule alignment assembly comprising:
optical fibers;
an upper clamp member and a lower clamp member configured to retain the optical fibers that are positioned between the upper
and lower clamp members;

a ferrule body surrounding at least a portion of the upper and lower clamp members; and
an alignment sleeve including a sleeve cavity configured to receive the ferrule body such that the ferrule body is capable
of being longitudinally and rotationally repositioned with respect to the alignment sleeve.

US Pat. No. 9,866,330

ACTIVE LINEAR AMPLIFIER INSIDE TRANSMITTER MODULE

FINISAR CORPORATION, Sun...

1. A transmitter module with an active linear amplifier circuit, comprising:
a header electrically coupled to a chassis ground;
a first input node configured to receive a first data signal;
a second input node configured to receive a second data signal that is complementary of the first data signal;
a buffer stage having a first node coupled to the first input node and a second node coupled to the second input node, wherein
the first node is at a first base terminal of a first transistor and the second node is at a second base terminal of a second
transistor, a first emitter terminal of the first transistor is coupled to a second emitter terminal of the second transistor
through a first resistor and a second resistor, and the first resistor and the second resistor are configured to be coupled
to a current source between the first resistor and the second resistor;

an amplifier stage having a fifth node coupled to a third node of the buffer stage and having a sixth node configured to be
coupled to a signal ground, wherein the signal ground is not coupled to the chassis ground;

an optical transmitter having an eighth node coupled to a seventh node of the amplifier stage and having a ninth node configured
to be coupled to a voltage source; and

a bias circuit configured to couple a fourth node of the buffer stage to a bias current source, wherein the fourth node is
at a first collector terminal side of the first transistor and at a second collector terminal side of the second transistor;

wherein:
the buffer stage includes a third resistor, a differential amplifier, and a first bipolar transistor;
the amplifier stage includes a second bipolar transistor and a fourth resistor; and
the bias circuit includes a current mirror circuit, a plurality of transistors, and a plurality of resistors.

US Pat. No. 9,726,838

OPTICAL FIBER SECURING DEVICE

FINISAR CORPORATION, Sun...

1. An optical fiber securing device comprising:
a lens block;
a passage defined in through a portion of the lens block, the passage having an entrance and an exit, the passage configured
to receive therein a portion of an optical fiber that is inserted through the entrance, and to receive an epoxy;

an optical fiber seat that is located at least partially within the passage and that runs from an edge of the lens block through
the passage to a lens, the optical fiber seat being configured to receive at least the portion of the optical fiber, the optical
fiber seat being configured to position an end of the optical fiber in optical alignment with the lens; and

a boundary positioned in a region of the exit of the passage, the boundary configured to prevent epoxy from being interposed
between the end of the optical fiber and the lens.

US Pat. No. 9,715,115

WAVELENGTH DIVISION MULTIPLEXING OF UNCOOLED LASERS WITH WAVELENGTH-COMMON DISPERSIVE ELEMENT

FINISAR CORPORATION, Sun...

1. An optical wavelength division demultiplexer, comprising:
at least one dispersive element, wherein each of the at least one dispersive element is common to a plurality of wavelength
channels;

a plurality of field lenses positioned optically downstream from the at least one dispersive element, a number of the plurality
of field lenses being equal to a number of the plurality of wavelength channels;

a first lens positioned to receive an input beam comprising the plurality of wavelength channels from an optical fiber, the
first lens configured to collimate the input beam;

a beam redirector positioned to receive the collimated input beam from the first lens and to redirect the collimated input
beam toward the at least one dispersive element, wherein the at least one dispersive element is configured to impart an angular
separation to the plurality of wavelength channels included in the collimated input beam dependent on wavelength;

a second lens positioned to receive an output of the at least one dispersive element and configured to focus the output of
the at least one dispersive element; and

a third lens positioned to receive an output of the second lens, the output of the second lens comprising the plurality of
wavelength channels propagating in parallel and laterally displaced from each other, wherein the third lens comprises an angled
surface and the plurality of field lenses, the angled surface configured to redirect the plurality of wavelength channels
to the plurality of field lenses for output to a plurality of photodetectors.

US Pat. No. 9,709,763

PLUGGABLE CONNECTOR

Finisar Corporation, Sun...

1. A pluggable connector configured to removably couple an end of an optical cable to an optoelectronic module, the pluggable
connector comprising:
a first portion configured to engage a latch slot of the optoelectronic module to retain within the optoelectronic module
a ferrule optically coupled to optical fibers of the optical cable; and

a second portion configured to engage the ferrule to prevent removal of the ferrule from within the optoelectronic module
when the first portion engages the latch slot;

wherein:
the first portion comprises a connector shell that includes a resilient tongue with a latch disposed on the resilient tongue,
wherein the latch extends upward from the resilient tongue, the latch configured to be received within the latch slot of the
optoelectronic module, wherein the connector shell is configured to receive therein at least a portion of the ferrule at a
front of the connector shell;

the second portion comprises a crimp ring base configured to be positioned partially within the connector shell and configured
to be positioned behind the ferrule, wherein the crimp ring base includes a resilient tab that is configured to be positioned
outside of the connector shell above the resilient tongue of the connector shell

the connector shell defines an opening into which the resilient tongue of the connector shell extends, wherein the connector
shell includes a top that is coplanar with the resilient tongue when the resilient tongue is in an undeflected state, the
resilient tongue being separated on multiple sides from the top of the connector shell by the opening;

the opening has a width that is greater than a width of the resilient tongue of the connector shell;
the resilient tab of the crimp ring base includes a protrusion configured to be positioned above the resilient tongue of the
connector shell;

the protrusion of the resilient tab of the crimp ring base has a width that is less than the width of the opening defined
in the connector shell; and

the resilient tab of the crimp ring base includes hard stops that extend outward from a location above the protrusion, the
resilient tab of the crimp ring base having a hard stop-to-hard stop width that is greater than the width of the opening defined
in the connector shell.

US Pat. No. 9,703,042

MULTIPLEXER/DEMULTIPLEXER BASED ON DIFFRACTION AND REFLECTION

Finisar Corporation, Sun...

1. A method for either demultiplexing or multiplexing a set of multiple optical signals, the method comprising either:
(A) directing a multiplexed optical signal to propagate along a multiplexed beam path to a multiplexed transmission region
of one or more diffractive optical elements of an optical apparatus, wherein the multiplexed optical signal comprises a corresponding
optical signal at each one of multiple different corresponding wavelengths in an operational wavelength range, and receiving
each corresponding optical signal at a corresponding one of multiple optical receivers of the optical apparatus, wherein each
corresponding optical signal propagates from a corresponding demultiplexed transmission region of a corresponding one of the
one or more diffractive optical elements along a corresponding demultiplexed beam path to the corresponding optical receiver;

or
(B) emitting a corresponding optical signal from each one of multiple optical sources at each one of the multiple different
corresponding wavelengths to propagate along the corresponding demultiplexed beam path to the corresponding demultiplexed
transmission region, wherein the corresponding optical signals propagate from the multiplexed transmission region along or
substantially parallel to the multiplexed beam path as a multiplexed optical signal,

wherein:
(a) the optical apparatus comprises one or more transmissive diffractive optical elements, one or more reflective optical
elements, and either the multiple optical sources or the multiple optical receivers;

(b) the one or more diffractive optical elements, the one or more reflective optical elements, and the multiple optical sources
or the multiple optical receivers are held in substantially fixed positions relative to one another;

(c) the one or more diffractive optical elements include (1) a multiplexed transmission region characterized by a corresponding
average grating-normal vector direction, a corresponding average grating wavevector magnitude, and a corresponding average
grating wavevector direction, and (2) multiple demultiplexed transmission regions that are spatially displaced from one another,
each of which is characterized by a corresponding average grating-normal vector direction, a corresponding average grating
wavevector magnitude, and a corresponding average grating wavevector direction;

(d) each one of the one or more reflective optical elements is characterized by a corresponding average reflector-normal vector
direction and a corresponding reflector surface shape;

(e) the relative positions of the one or more diffractive optical elements, the one or more reflective optical elements, and
the multiple optical sources or the multiple optical receivers, the grating-normal vector directions, the grating wavevector
magnitudes, the grating wavevector directions, the reflector-normal vector directions, and the reflector surface shapes are
such that each one of a set of multiple optical signals, at corresponding different selected signal wavelengths in the operational
wavelength range, co-propagating to the multiplexed transmission region along the multiplexed beam path would (i) be transmissively,
dispersively diffracted at the multiplexed transmission region, (ii) propagate between the multiplexed transmission region
and a corresponding one of the demultiplexed transmission regions undergoing at least one reflection from at least one of
the one or more reflective optical elements, (iii) be transmissively, dispersively diffracted at the corresponding demultiplexed
transmission region, and (iv) propagate between the corresponding demultiplexed transmission region and a corresponding one
of the multiple optical sources or the multiple optical receivers along a corresponding one of the multiple demultiplexed
beam paths.

US Pat. No. 9,705,503

SIGNAL CONVERSION

FINISAR CORPORATION, Sun...

1. A circuit, comprising:
an output terminal;
an input terminal configured to receive an input signal with a first voltage swing;
a transistor circuit including at least one or more transistor elements, the transistor circuit including:
a first terminal coupled to the output terminal;
a second terminal configured to receive a first voltage; and
a third terminal configured to receive a second voltage; and
a control circuit coupled to the input terminal, and configured to provide the first voltage and the second voltage to the
transistor circuit and to adjust the first voltage and the second voltage based on the input signal, the first voltage and
the second voltage adjusted such that the transistor circuit conducts in response to the input signal being at a first logical
level and conducts in response to the input signal being at a second logical level to generate an output signal on the output
terminal, wherein a second voltage swing of the output signal is different from the first voltage swing of the input signal,
the output signal is a first signal of a complementary metal-oxide semiconductor differential signal, and the input signal
is a first signal of a current-mode-logic differential signal.

US Pat. No. 9,673,815

DRIVER CIRCUIT

FINISAR CORPORATION, Sun...

1. A circuit comprising:
a first input node configured to receive a first signal of a differential input signal;
a second input node configured to receive a second signal of the differential input signal;
first and second output nodes;
an amplification circuit coupled to the first and second input nodes, the amplification circuit configured to receive the
first signal and the second signal of the differential input signal and to generate a first intermediate signal based on the
first signal of the differential input signal and to generate a second intermediate signal based on the second signal of the
differential input signal;

a transistor circuit coupled to the first and second output nodes and the amplification circuit, the transistor circuit configured
to conduct based on the first and second intermediate signals;

an adjust circuit configured to receive the first and second intermediate signals and to generate a first adjusted intermediate
signal based on the first intermediate signal and to generate a second adjusted intermediate signal based on the second intermediate
signal; and

an output circuit coupled to the amplification circuit and the first and second output nodes, the output circuit configured
to output first and second output signals on the first and second output nodes based on the respective first and second adjusted
intermediate signals.

US Pat. No. 9,606,416

DIFFERENTIAL TWE MZM DRIVER FOR SILICON PHOTONICS

FINISAR CORPORATION, Sun...

1. A differential traveling wave electrode (TWE) Mach-Zehnder-Modulator (MZM) driver, comprising:
a differential driver with a first differential output and a second differential output that collectively form a differential
pair, wherein:

the first differential output is DC coupled to a first arm optical phase shifter of a first arm TWE of a TWE MZM;
the second differential output is DC coupled to a second arm optical phase shifter of a second arm TWE of the TWE MZM, wherein
each of the first and second arm TWEs comprises a lossy TWE configured to attenuate a modulation signal;

a first capacitor that AC couples the second differential output to the first arm optical phase shifter;
a second capacitor that AC couples the first differential output to the second arm optical phase shifter;
a first termination coupled to the first arm optical phase shifter; and
a second termination coupled to the second arm optical phase shifter.

US Pat. No. 9,596,104

BLIND EQUALIZATION TAP COEFFICIENT ADAPTATION IN OPTICAL SYSTEMS

FINISAR CORPORATION, Sun...

1. A method of blind tap coefficient adaptation in an optical system, the method comprising:
equalizing a first portion of a received digital data signal using a first set of predetermined tap coefficients, wherein
the received digital data signal includes random digital data;

generating a first eye diagram from a first portion of an equalized signal, wherein the first portion of the equalized signal
is based on the first portion of the received digital data signal;

equalizing a second portion of the received digital data signal using a second set of predetermined tap coefficients;
generating a second eye diagram from a second portion of the equalized signal, wherein second portion of the equalized signal
is based on the second portion of the received digital data signal;

determining which of the first set of predetermined tap coefficients or the second set of predetermined tap coefficients results
in a data signal having a higher signal quality based on an evaluation of the first eye diagram and the second eye diagram;
and

adopting as an initial set of tap coefficients, the first set of predetermined tap coefficients or the second set of predetermined
tap coefficients according to the determination.

US Pat. No. 9,912,404

ELECTROMAGNETIC POWER MEASUREMENT AND REPORTING

Finisar Corporation, Sun...

13. A system, comprising:
a photodiode configured to receive electromagnetic radiation and generate a first electrical signal in response to the received
electromagnetic radiation, a magnitude of the first electrical signal based on a power of the electromagnetic radiation;

a circuit electrically coupled to the photodiode and configured to generate a second electrical signal based on the magnitude
of the first electrical signal;

a logarithmic amplifier electrically coupled to the circuit and configured to apply a logarithmic gain to the second electrical
signal to generate a logarithmically amplified electrical signal; and

an analog-to-digital converter electrically coupled to the logarithmic amplifier and configured to sample the logarithmically
amplified signal and generate a digital sample.

US Pat. No. 9,900,085

SPARING CONFIGURATIONS AND PROTOCOLS FOR PARALLEL FIBER OPTICS

FINISAR CORPORATION, Sun...

1. A transmitter comprising:
at least one primary laser emitter;
at least one primary monitor photodiode optically coupled with the at least one primary laser emitter;
at least one spare laser emitter;
at least one secondary laser emitter adjacent with each of the at least one primary laser emitters such that a first primary
laser emitter and a first secondary laser emitter pair are directed out a common optical fiber, wherein the at least one secondary
laser emitter is the at least one spare laser emitter;

a transmitter integrated circuit operably coupled with the at least one primary laser emitter and at least one spare laser
emitter, the transmitter integrated circuit comprising:

at least one primary channel operably coupled with the at least one primary laser emitter;
at least one spare channel operably coupled with the at least one spare laser emitter;
at least one switch on the at least one primary channel; and
at least one secondary channel operably coupled with the at least one switch and the at least one spare channel; and
a flag switch that sends a signal to a host having the transmitter when a first primary laser emitter fails and a first spare
laser emitter is activated.

US Pat. No. 9,900,974

FLEX-LESS MULTILAYER CERAMIC SUBSTRATE

FINISAR CORPORATION, Sun...

1. A flex-less optoelectronic assembly comprising:
a multilayer ceramic substrate that includes a plurality of ceramic layers and a via disposed through the plurality of ceramic
layers, the via extending between a first surface of the multilayer ceramic substrate and a second surface of the multilayer
ceramic substrate, the second surface of the multilayer ceramic substrate being oppositely positioned with respect to the
first surface of the multilayer ceramic substrate;

a module board coupled to the first surface of the multilayer ceramic substrate, the module board including a through hole
that is substantially aligned with the via;

an electronic component physically coupled to the second surface of the multilayer ceramic substrate, the via electrically
coupling the electronic component and the module board and

a heat sink physically coupled to the second surface of the multilayer ceramic substrate, the heat sink being configured to
dissipate heat emitted by the electronic component.

US Pat. No. 9,857,545

LATCH MECHANISM FOR COMMUNICATION MODULE

FINISAR CORPORATION, Sun...

1. A module latch mechanism comprising:
a follower having a first arm and a second arm;
a cross-piece that couples the first arm to the second arm, the cross-piece including a first portion of a fastening mechanism
that facilitates selective engagement of the follower with a housing; and

a driver positioned relative to the follower such that the driver urges the follower toward a first position relative to the
housing as the driver moves from a first engagement position to a second engagement position;

wherein the first arm defines an opening through which an electromagnetic interference (EMI) protrusion of the housing extends,
and the EMI protrusion is not included as part of the first arm, and the opening including a first bound and a second bound
in a Z axis of the first arm and an upper bound and a lower bound in a Y axis of the first arm, and a size of the opening
is oversized compared to the EMI protrusion to permit the follower to move within a permissible range with respect to the
housing restricted by the first bound, the second bound, the upper bound, and the lower bound of the opening while the EMI
protrusion remains within the opening, and the opening is located completely within the first arm such that the EMI protrusion
is surrounded by the first arm within the opening.

US Pat. No. 9,788,417

THERMAL MANAGEMENT STRUCTURES FOR OPTOELECTRONIC MODULES

FINISAR CORPORATION, Sun...

1. An optoelectronic module comprising:
a lens assembly;
a module board including a printed circuit board (PCB) on a central portion of a top surface of the module board, wherein
the lens assembly is secured to the top surface of the module board;

heat-generating components mounted to the PCB;
a thermally conductive plate; and
a cover positioned on the module board such that the cover encloses a top surface of the module board, wherein:
the cover defines a cavity into which the lens assembly, the heat-generating component, and the thermally conductive plate
are positioned,

the module board borders the cavity such that the cover and the module board surround the lens assembly and the thermally
conductive plate, and enclose the heat-generating components,

the thermally conductive plate defines an opening in which at least a portion of the lens assembly is positioned,
the thermally conductive plate includes a rear portion, a front portion, two plate feet coupled to the front portion, and
two plate feet coupled to the rear portion,

the rear portion includes a bottom surface and a rear thickness,
the plate feet include a foot thickness that is greater than the rear thickness of the rear portion,
the front portion is opposite the rear portion and includes a front thickness that is less than the foot thickness,
the front thickness is sized to provide clearance for introduction of an optical interface to the lens assembly,
the plate feet are secured directly to the top surface of the module board such that the rear portion and the front portion
are separated from the top surface of the module board,

at least one of the heat-generating components is positioned between the bottom surface of the rear portion and the PCB, and
the rear thickness of the rear portion is configured such that the bottom surface of the rear portion of the thermally conductive
plate directly physically contacts the at least one of the heat-generating components to absorb at least a portion of thermal
energy generated during operation of the at least one of the heat-generating components.

US Pat. No. 9,709,760

CHIP ON FLEX OPTICAL SUBASSEMBLY

FINISAR CORPORATION, Sun...

1. An optical subassembly comprising:
a flex circuit that includes a printed circuit board (PCB) flex connection and a flex connection, wherein the PCB flex connection
is included on a first portion of the flex circuit that is opposite a second portion of the flex circuit that includes the
flex connection;

an optical port that defines a fiber receiver and a barrel cavity, the optical port being mechanically coupled to the flex
circuit at the flex connection on a first surface of the flex circuit;

an active optical subassembly positioned within the barrel cavity and located on the first surface of the flex circuit, wherein
the active optical subassembly includes at least one active optical component that is mechanically coupled directly to the
flex circuit and is aligned relative to the fiber receiver; and

a heat sink stiffener located on a second surface of the flex circuit opposite the active optical component subassembly and
located on the second portion of the flex circuit, the heat sink stiffener being configured to stiffen the second portion
of the flex circuit and act as a thermal sink for at least a portion of heat generated during operation of the active optical
subassembly,

wherein the first portion including the PCB flex connection is unsupported by the heat sink stiffener and is configured to
communicate electrical signals between a host system and the active optical subassembly.

US Pat. No. 9,618,664

PARTIALLY ETCHED PHASE-TRANSFORMING OPTICAL ELEMENT

Finisar Corporation, Sun...

1. An optical element comprising a transmissive layer comprising first and second optical media, wherein:
(a) the first and second optical media are substantially transparent over an operational wavelength range including a design
vacuum wavelength ?0 and are characterized by differing respective first and second wavelength-dependent bulk refractive indices n1(?) and n2(?), and the first optical medium comprises a substantially solid material;

(b) the first and second optical media are arranged within the layer as a contiguous multitude of discrete volumes, including
a subset of volumes of the multitude having a largest transverse dimension less than about ?0, wherein each discrete volume comprises either the first optical medium or the second optical medium, but not both;

(c) the contiguous multitude of discrete volumes is arranged so that (i) any given simply connected sample volume of the transmissive
layer, said sample volume having transverse dimensions about equal to ?0 and extending from the first surface through the transmissive layer to a second surface of the transmissive layer, includes
only the first optical medium, only the second optical medium, or both the first and second optical media of at least portions
of two or more of the discrete volumes, and (ii) any straight-line path, extending substantially perpendicularly from a first
surface of the transmissive layer to a second surface of the transmissive layer, passes through only the first optical medium,
through only the second optical medium, or through only one discrete volume of each of the first and second optical media;

(d) the discrete volumes of the multitude are distributed on the transmissive layer so that (2?/?0)·(n1(?0)·d1(x,y)+n2(?0)·d2(x,y)), as a function of two-dimensional position coordinates x and y along the first surface of the transmissive layer, averaged
over a sampling area having a largest transverse dimension about equal to ?0 along the first surface of the transmissive layer, is substantially equal to a specified position-dependent effective phase
transformation function ?eff(x,y), or substantially equal to ½·?eff(x,y), where (i) d1(x,y) and d2(x,y) are the respective local distances through the first and second optical media along the straight-line path through a
given position (x,y), and (ii) ?eff(x,y) varies with both x and y; and

(e) the optical element is structurally arranged so as to receive an optical signal incident on the first surface within the
transmission region and to transmit or reflect at least a portion of the incident optical signal transformed substantially
according to the effective phase transformation function ?eff(x,y).

US Pat. No. 9,851,508

WAVELENGTH SELECTIVE SWITCH FOR MULTIMODE OPTICAL SYSTEMS

Finisar Corporation, Sun...

1. A wavelength selective switch, comprising:
a steering element;
an optical subsystem configured to collimate and demultiplex an input multimode optical signal into input discrete wavelength
channels, the optical subsystem comprising a collimating lens and a dispersive element, wherein:

the optical subsystem is located between a fiber array and the steering element; and
the collimating lens is located between the fiber array and the dispersive element;
a cylindrical lens located between the optical subsystem and the steering element.

US Pat. No. 9,838,116

DETECTING PRESENCE OF ACTIVE OPTICAL CABLES IN PERIPHERAL COMPONENT INTERCONNECT-EXPRESS LINKS

Finisar Corporation, Sun...

1. A peripheral component interconnect-express (PCIe) link with presence of an active optical cable (AOC) that couples between
an electrical PCIe (E-PCIe) transmitter and an E-PCIe receiver, the PCIe link comprising:
the AOC that includes an electrical-to-optical PCIe (EO-PCIe) transceiver coupled to the E-PCIe transmitter, wherein the EO-PCIe
transceiver includes a laser diode driver that includes a common mode voltage output terminal; and

a detection condition circuit that includes a decoupling capacitor, the detection condition circuit included in the EO-PCIe
transceiver, wherein the decoupling capacitor is referenced to a ground level and connects to the common mode voltage output
terminal of the laser diode driver,

wherein the detection condition circuit creates a receiver detection condition for a receiver detection circuit of the E-PCIe
transmitter to detect presence of the AOC.

US Pat. No. 9,823,430

LENS RECEPTACLES

FINISAR CORPORATION, Sun...

1. An optoelectronic subassembly comprising:
a lens receptacle including a receptacle body extending between a receptacle top and a receptacle bottom, the receptacle body
including:

a port body defining a receptacle port at the receptacle top;
a receptacle window defining a base of the receptacle port;
a lens array including lenses positioned on the receptacle window; and
at least one receptacle alignment feature;
a multi-channel header subassembly optically coupled to the lens receptacle; and
a housing positioned between the lens receptacle and the multi-channel header subassembly, the housing comprising a housing
window physically separate from the receptacle window that is at least partially optically transmissive.

US Pat. No. 9,798,099

LATCH FOR COMMUNICATION MODULE

Finisar Corporation, Sun...

1. A communication module, comprising:
a printed circuit board that includes an edge connector configured to electrically interface the communication module with
a host device that includes a port to receive the communication module;

a housing that includes a left sidewall, a right sidewall, a top panel, a bottom panel, and a catch pin that extends from
the bottom panel, wherein the housing at least partially encloses the printed circuit board; and

a delatch assembly slidably engaged with the bottom panel of the housing, the delatch assembly comprising:
a first delatch arm that extends longitudinally underneath the bottom panel of the housing;
a second delatch arm spaced apart from the first delatch arm that extends longitudinally underneath the bottom panel of the
housing;

a delatch cross-member that extends laterally underneath the bottom panel of the housing between the first delatch arm and
the second delatch arm; and

a hooking member coupled to the delatch cross-member and configured to selectively engage the catch pin as the delatch assembly
slides along the housing,

wherein the first and second delatch arms are configured to selectively disengage the communication module from the port of
the host device by directly contacting and deflecting first and second resilient tabs of the port away from an interference
position with the communication module during disengagement of the communication module from the port.

US Pat. No. 9,575,259

N×N OPTICAL SWITCH

Finisar Corporation, Hor...

1. An optical cross-connect connecting a series of optical input ports to a series of optical output ports, the cross-connect
including:
at least a first group of input/output port arrays located at spatially separated locations in at least a first horizontal
dimension;

each of the input/output port arrays having a series of optical input/output ports disposed horizontally and configured to
project or receive optical signals;

a plurality of steering elements configured to selectively steer optical signals along switching trajectories between the
input and output ports by tilting vertically at predetermined inter-array angles to select a desired input/output port array
and by tilting horizontally at predetermined intra-array angles to select a desired input/output port within the desired input/output
port array;

an angle-to-offset conversion unit for converting optical signals propagating at the horizontal intra-array angles to corresponding
spatial offset signals in the horizontal dimension; and

an optical interconnect having a series of input/output regions, each of the input/output regions being specific to a corresponding
input/output port array and the input/output regions being divided vertically into elongated switching rows, each input/output
region receiving spatial offset signals from the angle-to-offset conversion unit and optically interconnecting each spatial
offset signal from a first input/output region to a second input/output region with predetermined interconnects interconnecting
the input/output regions based on the inter-array angles of the spatial offset signals.

US Pat. No. 9,575,268

PLUGGABLE CONNECTOR

FINISAR CORPORATION, Sun...

1. A pluggable connector configured to removably couple an end of an optical cable to an optoelectronic module, the pluggable
connector comprising:
a first portion configured to engage a latch slot of the optoelectronic module to retain within the optoelectronic module
a ferrule optically coupled to optical fibers of the optical cable, wherein the first portion comprises a connector shell
that includes a resilient tongue with a latch disposed on the tongue, the latch configured to be received within the latch
slot of the optoelectronic module, wherein the connector shell is configured to receive therein at least a portion of the
ferrule at a front of the connector shell; and

a second portion configured to engage the ferrule to prevent removal of the ferrule from within the optoelectronic module
when the first portion engages the latch slot, wherein the second portion comprises a resilient tab that is configured to
be positioned outside of the connector shell above the resilient tongue of the connector shell;

wherein in response to application of an actuation force of sufficient magnitude to the resilient tab of the upper clamp:
the resilient tab of the second portion is configured to deflect downward into contact with the resilient tongue of the connector
shell;

the resilient tongue of the connector shell is configured to deflect downward; and
the connector shell is configured to engage the hard stops of the resilient tab of the second portion to prevent the resilient
tongue of the connector shell from deflecting downward beyond a predetermined distance determined by a distance the protrusion
extends below the hard stops of the resilient tab of the second portion.

US Pat. No. 9,917,649

METHOD AND APPARATUS FOR CHARACTERIZATION AND COMPENSATION OF OPTICAL IMPAIRMENTS IN INP-BASED OPTICAL TRANSMITTER

Finisar Corporation, Hor...

1. A method for characterizing and compensating for optical impairments in an optical transmitter, the method comprising:
a) operating an optical transmitter comprising a first parent Mach-Zehnder (MZ) modulator and a second parent MZ modulator,
wherein each of the first and second parent MZ modulators comprises a plurality of child MZ modulators;

b) biasing each of the plurality of child MZ modulators in the first and second parent MZ modulators at respective initial
operating points;

c) generating an electro-optic RF transfer function for each of the plurality of child MZ modulators by measuring a plurality
of optical output powers of the optical transmitter while sweeping characterizing RF input drive power levels applied to each
of the plurality of child MZ modulators;

d) determining curve fitting parameters for each of the plurality of electro-optic RF transfer functions;
e) determining operating points of each of the plurality of child MZ modulators using the curve fitting parameters;
f) determining a power imbalance of at least two of the plurality of child MZ modulators at a select operating point; and
g) determining control set points for a first and second modulator drive amplifier electrically connected to a respective
one of the at least two of the plurality of child MZ modulators that compensate for at least some of the power imbalance.

US Pat. No. 9,874,691

TWO-STAGE ADIABATICALLY COUPLED PHOTONIC SYSTEMS

Finisar Corporation, Sun...

1. A coupled system comprising:
a first waveguide with a silicon (Si) core having a first refractive index n1 and a tapered end;
at least one second waveguide, each with a silicon nitride (SiN) core having a second refractive index n2;
an interposer comprising a third waveguide with a core having a third refractive index n3 and a coupler portion, wherein:
the tapered end of the first waveguide is adiabatically coupled to a coupler portion of one of the at least one second waveguide;
a tapered end of one of the at least one second waveguide is adiabatically coupled to the coupler portion of the third waveguide
of the interposer;

n1>n2>n3;
the coupled system is configured to adiabatically couple light between the first waveguide and the at least one second waveguide
and between the at least one second waveguide and the third waveguide; and

the third waveguide of the interposer has an optical mode size that is similar to the mode size of a single mode optical fiber,
wherein the optical mode size of the third waveguide is in a range between 8 micrometers and 12 micrometers and the mode size
of the single mode optical fiber is about 10 micrometers.

US Pat. No. 9,767,757

PIPELINED PIXEL APPLICATIONS IN LIQUID CRYSTAL ON SILICON CHIP

FINISAR CORPORATION, Sun...

1. A liquid crystal on silicon integrated circuit comprising:
a plurality of pixels that are arranged in a pixel array;
a column driver that includes:
a line switch; and
a primary circuit configured to supply a driven signal and a flash circuit configured to supply a flash signal to a single
column of pixels of a plurality of columns of pixels included in the pixel array, the primary circuit including a sample and
hold circuit including a primary amplifier coupled to the line switch and a sample switch configured to regulate input of
an analog ramp signal to the primary amplifier, wherein the analog ramp signal varies from an initial voltage to a target
voltage; and

a plurality of conductive lines, wherein:
a first conductive line of the plurality of conductive lines couples the column driver to a first subset of pixels in the
single column of pixels,

a second conductive line of the plurality of conductive lines couples the column driver to a second subset of pixels in the
single column of pixels, and

the plurality of conductive lines are configured such that a first signal of the driven signal and the flash signal can be
supplied to the first subset of pixels and a second signal of the driven signal and the flash signal can be supplied to the
second subset of pixels with some overlapping duration,

wherein the line switch is configured to couple the primary circuit to one of the first conductive line or the second conductive
line and to couple the flash circuit to the other of the first conductive line or the second conductive line.

US Pat. No. 9,948,311

DECISION-DIRECTED PHASE DETECTOR

Finisar Corporation, Sun...

1. A decision-directed phase detector, comprising:a first comparator configured to compare an input signal including clock and data components with a reference signal set to a clock crossover value, and to generate a first compared output signal designating a transition of the input signal through the clock crossover value;
a phase detector configured to receive the first compared output signal and generate a phase adjustment signal;
a second comparator configured to compare the input signal with the reference signal set to a positive offset clock crossover value of the clock crossover value offset by a positive offset value, and to generate a positive offset compared output signal designating a transition of the input signal through the positive offset clock crossover value; and
a transition detection circuit to generate a valid transition signal to route the phase adjustment signal to a clock generation circuit when the positive offset compared output signal transitions over a clock period.

US Pat. No. 9,852,057

LIGHT-WEIGHT ON-CHIP SIGNAL MONITOR WITH INTEGRATED MEMORY MANAGEMENT AND DATA COLLECTION

Finisar Corporation, Sun...

1. An on-chip signal monitor comprising:
a clock and data recovery (CDR) unit that provides a reference clock signal;
a state machine that includes a sequencing logic, the sequencing logic configured to set a sample gate signal to a first level
to initiate each sample acquisition, the sequencing logic configured to trigger an update of at least one of a digitized time
value or a digitized amplitude value;

a trigger flip flop that connects to the CDR unit to receive the reference clock signal and the sequencing logic to receive
the sample gate signal, the trigger flip flop configured to pass a rising edge of the reference clock signal to an input of
a programmable delay chain responsive to the sample gate signal being set to the first level;

the programmable delay chain that receives the digitized time value and outputs a delayed rising edge to a sample capture
unit at a time slice window determined by the digitized time value;

the sample capture unit that, responsive to the delayed rising edge, captures a sample from an input signal within the time
slice window and an amplitude slice window determined by the digitized amplitude value;

an address generator that uses the digitized time value and the digitized amplitude value to form an address of an accumulator
register located in a memory; and

a load-increment-store logic that fetches a value of the accumulator register from the address of the memory, increments the
value by 1, and stores the incremented value in the address.

US Pat. No. 9,703,044

WAVELENGTH DIVISION MULTIPLEXING

FINISAR CORPORATION, Sun...

1. A system comprising:
a first light source configured to generate a first beam of light at a first wavelength;
a second light source configured to generate a second beam of light at a second wavelength;
a third light source configured to generate a third beam of light at a third wavelength;
a fourth light source configured to generate a fourth beam of light at a fourth wavelength;
a thin-film filter configured to receive the first beam and the fourth beam and configured to combine the first beam and the
fourth beam into a fifth beam of light that includes the first beam at the first wavelength and the fourth beam at the fourth
wavelength;

a first polarization beam splitter (PBS) configured to receive the second beam and the fifth beam and configured to combine
the second beam and the fifth beam into a sixth beam of light that includes the first beam at the first wavelength, the second
beam at the second wavelength, and the fourth beam at the fourth wavelength;

a wave plate configured to receive the sixth beam and configured to rotate a polarization orientation of the sixth beam; and
a second PBS configured to receive the third beam and the sixth beam following rotation of the polarization orientation of
the sixth beam and configured to combine the third beam comprising a single beam and the sixth beam comprising a combined
beam into a seventh beam of light that includes the first beam at the first wavelength, the second beam at the second wavelength,
the third beam at the third wavelength, and the fourth beam at the fourth wavelength, and the sixth beam including at least
a first plurality of the first, second, third and fourth beams having a first polarization and at least one of the first,
second, third and fourth beams different from the first plurality having a different polarization than the first plurality.

US Pat. No. 9,692,518

METHOD AND APPARATUS FOR STABILIZATION OF OPTICAL TRANSMITTER

Finisar Corporation, Hor...

1. A dual polarization optical modulator comprising:
a) a first Mach-Zehnder modulator superstructure comprising two parallel child Mach-Zehnder optical modulators, the first
Mach-Zehnder modulator superstructure modulating a first optical signal with a first polarization;

b) a second Mach-Zehnder modulator superstructure comprising two parallel child Mach-Zehnder optical modulators, the second
Mach-Zehnder modulator superstructure being optically coupled in parallel with the first Mach-Zehnder modulator superstructure
to form a dual polarization optical modulator having an optical input that receives an optical beam from a laser source, the
second Mach-Zehnder modulator superstructure modulating a second optical signal with a second polarization and the dual polarization
optical modulator multiplexing the first optical signal with the first polarization and the second optical signal with the
second polarization to form a dual polarization optical signal;

c) a first optical detector coupled to an output of the first Mach-Zehnder modulator superstructure;
d) a second optical detector coupled to an output of the second Mach-Zehnder modulator superstructure;
e) a third optical detector connected to an output of the dual polarization optical modulator; and
f) a bias control circuit having a first, second, and third input electrically connected to an output of a respective one
of the first, second, and third optical detectors and a first output electrically connected to a bias input of the first Mach-Zehnder
modulator superstructure and a second output electrically connected to a bias input of the second Mach-Zehnder modulator superstructure,
the bias control circuit generating bias signals on at least one of the first and second outputs in response to both DC and
AC signals detected by at least one of the first, second, and third optical detectors that stabilizes the dual polarization
signal, wherein the bias control circuit generates an electrical signal on at least one of the first and second outputs that
maximizes average DC photocurrent generated by at least one of the first, second, and third optical detectors.

US Pat. No. 10,063,032

DISTRIBUTED REFLECTOR LASER

FINISAR CORPORATION, Sun...

10. A distributed reflector (DR) laser, comprising:a distributed feedback (DFB) region having a length in a range from 30 micrometers (?m) to 100 ?m and comprising a DFB grating with a first kappa in a range from 100 cm?1 to 150 cm?1;
a distributed Bragg reflector (DBR) region coupled end to end with the DFB region, having a length in a range from 30-300 ?m and comprising a DBR grating with a second kappa in a range from 150 cm?1 to 200 cm?1;
a lasing mode at a long wavelength side of a peak of a DBR reflection profile of the DBR region;
an external cavity mode within 1 nanometer of the lasing mode;
a p-p resonance frequency in a range from 50-60 gigahertz (GHz);
an intrinsic resonant frequency (Fr) in a range from 30-35 GHz; and
a 3-decibel (dB) modulation bandwidth (BW) of at least 50 gigahertz (GHz).

US Pat. No. 10,003,411

POLARIZATION DEMULTIPLEXING OF OPTICAL SIGNALS

Finisar Corporation, Sun...

1. An optical receiver comprising:a polarization beam splitter (PBS) configured to split a received optical signal having an unknown polarization state into two orthogonal polarizations that include an x?-polarization and a y?-polarization;
a polarization controller having non-endless polarization tracking, the polarization controller including only two couplers and only two phase shifters per channel, a first phase shifter of the two phase shifters being configured to reset when a first phase rotation angle exceeds a range of about 0 to about 2?, and a second phase shifter of the two phase shifters being configured to maintain a second phase rotation angle between about 0 and about ?; and
a forward error correction (FEC) decoder module configured to correct a burst of errors resulting from resetting one of the two phase shifters based on error correction code (ECC) data encoded in the received optical signal.

US Pat. No. 9,971,718

DIFFERENTIAL AMPLITUDE DETECTOR

FINISAR CORPORATION, Sun...

1. An idle state detection circuit, the circuit comprising:a bias current loop that is configured to provide a rectifying diode a forward current such that the rectifying diode is configured to detect an alternating current (AC) signal received from a transmitter via one or more transmission nodes;
a rectifying circuit loop that is configured to store differential peak to peak amplitude information representative of a peak to peak amplitude of the AC signal in a first capacitor that is electrically coupled to a cathode side of the rectifying diode;
a voltage translating loop that is configured to convert the differential peak to peak amplitude information stored at the first capacitor to a single-end voltage signal across a first resistor that is electrically coupled to the cathode side of the rectifying diode; and
a filter circuit that is configured to filter an AC component of the single-end voltage signal.

US Pat. No. 9,946,028

WAFER ASSEMBLY INCLUDING A GUIDE PIN WAFER

Finisar Corporation, Sun...

1. A guide pin wafer comprising:a substantially planar base wafer that includes multiple dies with each die including a corresponding lens cutout; and
multiple guide pins implanted in the base wafer, the guide pins having an end extending into the base wafer, each die of the base wafer being implanted with two or more corresponding guide pins that are configured to engage a parallel fiber connector to the corresponding die.

US Pat. No. 9,897,758

OPTICAL CIRCULATORS INTEGRATED INTO TRANSCEIVERS

FINISAR CORPORATION, Sun...

1. An optical circulator for providing bi-directional communication, the optical circulator comprising:
a bi-directional propagation core configured to pass a transmission signal in a transmit direction and a received signal in
a receive direction, the bi-directional propagation core including:

a first, a second and a third polarization beam splitter (PBS);
a first polarization shifting assembly positioned between and optically coupled to the first and the second PBS; and
a second polarization shifting assembly positioned between and optically coupled to the second and the third PBS;
wherein the bi-directional propagation core passes the received signal from the first PBS to the third PBS through the first
polarization shifting assembly, the second PBS, and the second polarization shifting assembly;

wherein the bi-directional propagation core passes the transmission signal from the second PBS to the first PBS through the
first polarization shifting assembly.

US Pat. No. 9,885,815

INTEGRATED BIREFRINGENT GRIDLESS WAVELENGTH LOCKER

Finisar Corporation, Sun...

1. An optical transmitter comprising:
an etalon positioned in a beam path of a light beam, the etalon comprising:
a first birefringent crystal having a first optical axis; and
a second birefringent crystal having a second optical axis,
wherein the first birefringent crystal is coupled to the second birefringent crystal such that the first optical axis and
the second optical axis are orthogonal to one another; and

wherein the etalon is configured to receive the light beam that simultaneously has both a horizontal polarization component
and a vertical polarization component;

wherein the horizontal polarization component and the vertical polarization component of the light beam experience different
delays as the light beam travels through the etalon; and

a polarization beam splitter positioned in a common beam path of the delayed horizontal and vertical polarization components
received from the etalon, the polarization beam splitter configured to separate the delayed horizontal and vertical polarization
components onto separate beam paths;

a first etalon detector positioned in a first one of the separate beam paths and configured to receive the delayed horizontal
polarization component; and

a second etalon detector positioned in a second one of the separate beam paths and configured to receive the delayed vertical
polarization component.

US Pat. No. 9,929,802

DECISION THRESHOLD ADJUSTMENT

FINISAR CORPORATION, Sun...

1. A method comprising:receiving a digital data signal at an optical receiver;
recovering a clock signal from the digital data signal;
measuring an eye quality of the received digital data signal by an eye quality monitor that is driven based on the recovered clock signal;
adjusting a decision threshold value of a decision threshold controller of the optical receiver based on the measured eye quality;
comparing the adjusted decision threshold value against the digital data signal to determine whether to output a digital “HIGH” value for the digital data signal or to output a digital “LOW” value for the digital data signal;
obtaining a plurality of signal quality factors that include: a temperature of the optical receiver, a power of an optical signal received at the optical receiver and that includes the digital data signal, a bit rate of the digital data signal, and a channel frequency of the optical signal, wherein the obtaining of each of the signal quality factors is based on the eye quality being affected by the signal quality factors;
detecting a change in the plurality of signal quality factors based on the obtained signal quality factors;
generating an eye quality measurement control signal in response to detecting the change;
activating the eye quality monitor based on the eye quality measurement control signal such that the eye quality monitor takes a subsequent measurement of the eye quality of the digital data signal in response to the change being detected;
analyzing the subsequent measurement of the eye quality in response to detecting the change; and
readjusting the decision threshold value based on the analyzing of the subsequent measurement of the eye quality that was made in response to the eye quality measurement control signal that was generated in response to detecting the change.

US Pat. No. 10,009,195

NONLINEAR EQUALIZER

Finisar Corporation, Sun...

1. A nonlinear equalizer, comprising:a linear equalizer circuit including a plurality of time delayed taps and configured to receive an input signal and generate an output signal; and
a nonlinear circuit configured to receive signals from at least a portion of the time delayed taps and generate at least a portion of a difference between the signals, the output signal based at least in part on the difference.

US Pat. No. 9,998,234

OPTICAL RECEIVER AND TRANSCEIVER USING THE SAME

FINISAR CORPORATION, Sun...

1. An optical receiver comprising:a dielectric substrate;
a ground plane positioned on the dielectric substrate;
a photodiode positioned on the dielectric substrate, receiving an optical signal and having an optical signal input and an electrical signal output;
an electrical signal amplifier having an input connected to the electrical signal output of the photodiode; and
a first opening defined in the around plane, the first opening surrounding the photodiode to isolate the photodiode from the ground plane and the first opening being sized and shaped to have a resonance frequency higher than a signal fundamental frequency such that crosstalk is reduced at the input of the electrical signal amplifier.

US Pat. No. 9,941,864

INTEGRATED POWER SUPPLY FOR FIBER OPTIC COMMUNICATION DEVICES AND SUBSYSTEMS

FINISAR CORPORATION, Sun...

1. An optical assembly configured for use in fiber optic communication devices, the optical assembly comprising:an integrated circuit (IC) mounted to a substrate, the IC being constructed using an orthogonal gate extended drain complementary metal-oxide-semiconductor (OG EDCMOS) technology, the IC including:
one or more integrated power supplies, each of the one or more power supplies including:
a filter configured to convert a source signal to an output signal of the integrated power supply, the filter including an IC passive component located in the IC and a substrate integrated passive component located in the substrate;
an active switch configured to control an entry of the source signal to the filter; and
a pulse width modulator (PWM) configured to generate a PWM output signal that triggers the active switch, wherein a first capacity of the IC passive component and a second capacity of the substrate integrated passive component are configured based on a frequency of the PWM output signal and a current of the source signal; and
other integrated components that are configured to receive the output signal from the filter and to operate based on the output signal, the other integrated components being integrated into the IC using the OG EDCMOS technology.

US Pat. No. 10,037,815

ANALOG-TO-DIGITAL CONVERTERS

Finisar Corporation, Sun...

1. A device, comprising:a first track and hold amplifier (THA) configured to receive an analog input signal; and
a plurality of paths coupled to an output of the first THA, each path of the plurality of paths including:
a second THA coupled to the first THA; and
a successive approximation register analog-to-digital converter (SAR ADC) coupled to an output of the second THA, the SAR ADC including:
a comparator including an input coupled to an output of the second THA;
a latch coupled to an output of the comparator;
a SAR coupled to an output of the latch, the SAR comprising a plurality of cells, each cell of the plurality of cells including an emitter follower coupled to a settable and resettable latch; and
a R-2R DAC coupled between an output of the SAR and another input of the comparator.

US Pat. No. 10,009,112

ELECTROMAGNETIC INTERFERENCE REDUCTION

FINISAR CORPORATION, Sun...

1. A method of reducing electromagnetic interference (EMI) in a multi-channel transmitter, the method comprising:receiving multiple signals configured to be transmitted through multiple channels;
adjusting delays of the multiple signals to generate multiple delayed signals, wherein each two adjacent delayed signals are configured to have a corresponding phase difference that satisfies a phase delay requirement, wherein at least one corresponding phase difference between two adjacent delayed signals is different than at least one other corresponding phase difference between two adjacent delayed signals and at least one corresponding phase difference between two adjacent delayed signals is the same or similar to at least one other corresponding phase difference between two adjacent delayed signals; and
generating multiple load signals from the multiple delayed signals,
wherein the at least one corresponding phase difference between two adjacent delayed signals that is different than at least one other corresponding phase difference between two adjacent delayed signals is determined according to (??4?/N) and the at least one corresponding phase difference between two adjacent delayed signals that is the same or similar to at least one other corresponding phase difference is determined according to 2?/N and N is a number of multiple channels in the multi-channel transmitter.

US Pat. No. 9,997,892

PASSIVATION OF VCSEL SIDEWALLS

FINISAR CORPORATION, Sun...

1. A semiconductor structure configured for use in an optical semiconductor device comprising:an oxidizing layer comprising an oxide aperture;
a plurality of layers near the oxidizing layer comprising:
a thermal conduction layer disposed above the oxidizing layer, the thermal conduction layer including aluminum,
a mirror above the thermal conduction layer, and
a stop etch layer disposed above the oxidizing layer and below the mirror, the stop etch layer having a lower etch selectivity than the thermal conduction layer with respect to a particular etchant;
a passivation material disposed on the thermal conduction layer and the mirror, the passivation material configured to inhibit oxidation of the thermal conduction layer and the mirror; and
a bottom mirror, wherein the bottom mirror comprises a DBR mirror.

US Pat. No. 9,995,886

CABLE CONNECTOR

FINISAR CORPORATION, Sun...

1. A cable connector assembly comprising:a cable connector that is configured to retain portions of optical fibers and to be engaged with a communication module that is configured to receive LC connectors, wherein the cable connector includes:
a connector housing that defines a housing cavity,
two fiber support structures that are dimensioned to substantially comply with an LC connector standard, connect to the connector housing, and extend in a first direction from the connector housing, and
a latch structure that connects to the connector housing, wherein the latch structure extends in the first direction from the connector housing, the latch structure is separated from the two fiber support structures in a second direction, and the latch structure does not include a release structure configured to disengage the latch structure from latch tabs of the communication module such that the latch structure is configurable in a permanently-assembled arrangement with the latch tabs;
two fiber subassemblies that are at least partially positioned in fiber cavities defined by the fiber support structures; and
a cable block positioned at least partially within the housing cavity, wherein the cable block is configured to receive two optical fibers and route one of the optical fibers into each of the fiber support structures.

US Pat. No. 9,995,941

WAVELENGTH DIVISION MULTIPLEXING OF UNCOOLED LASERS WITH WAVELENGTH-COMMON DISPERSIVE ELEMENT

FINISAR CORPORATION, Sun...

1. An optical wavelength division multiplexer, comprising:a single piece power monitor assembly that includes integrally formed therein:
a collimator lens array positioned to receive a plurality of wavelength channels from a laser array;
a focusing lens array positioned to focus a plurality of portions of the plurality of wavelength channels onto an array of photodetectors; and
a slot configured to tap the plurality of portions from the plurality of wavelength channels collimated into the single piece power monitor assembly by the collimator lens array and to direct the plurality of portions toward the focusing lens array; and
at least one dispersive element positioned to combine the plurality of wavelength channels from the power monitor assembly through either refraction or diffraction, wherein each of the at least one dispersive element is common to at least two of the plurality of wavelength channels, and wherein the at least one dispersive element comprises at least one of a prism, a diffractive element, a fused silica grating, or a grating with a line density of 1700 lines per millimeter.

US Pat. No. 9,912,437

OPTICAL TRANSMITTERS

Finisar Corporation, Sun...

1. An optical transmitter, comprising:
a transmit laser assembly that includes a plurality of lasers configured to emit a plurality of light beams, each of the plurality
of light beams including the same polarization state;

a single isolator configured to rotate a corresponding polarization state of each of the plurality of light beams;
a power multiplexing (PMUX) combiner configured to receive the plurality of light beams from the isolator and combine the
plurality of light beams into a combined light beam; and

a lens configured to focus the combined light beam onto an optical fiber for transmission.

US Pat. No. 9,995,890

THERMAL MANAGEMENT OF A LOCKER ETALON IN A TRANSMITTER OPTICAL SUBASSEMBLY

FINISAR CORPORATION, Sun...

1. A transmitter optical subassembly (TOSA) comprising:a case;
a laser positioned within the case and electro-thermally connected to the case;
a locker etalon positioned in the case and thermally connected to the case; and
a single thermoelectric cooler (TEC) positioned within the case and in thermal contact with both the laser and the locker etalon,
wherein:
the thermal connection between the case and the locker etalon is configured to maintain a substantially constant difference in temperature between the laser and the locker etalon over a pre-defined range of case temperatures of ?5° C. to 75° C.; and
a peak etalon ITU frequency of the locker etalon is less than or equal to 1 gigahertz (GHz) over the pre-defined range of case temperatures.

US Pat. No. 9,998,254

METHOD AND APPARATUS FOR HARDWARE CONFIGURED NETWORK

Finisar Corporation, Hor...

1. An optical network element for a hardware configured optical network, the optical network element comprising:a) a first optical port that receives an input optical signal comprising an optical carrier comprising client data traffic and comprising receive control information from the hardware configured optical network;
b) an optical splitter having an input that is optically coupled to the first optical port, the optical splitter separating the input optical signal into a first portion that is sent to a first output and a second portion that is sent to a second output;
c) a demodulator having an input that is optically coupled to the first output of the optical splitter, the demodulator decoding the receive control information for configuring the optical network element;
d) a modulator having an electrical modulation input that receives transmit control information and an optical input that is optically coupled to the second output of the optical splitter, the modulator imparting a low-frequency modulation directly onto the optical signal comprising the optical carrier comprising client data traffic, wherein a frequency of the low-frequency modulation is less than a modulation frequency of the client data traffic, thereby generating a transmit optical control signal comprising the optical carrier comprising the client data traffic, wherein the transmit optical control signal represents the received transmit control information; and
e) a second optical port that transmits the transmit optical control signal representing the received transmit control information to the hardware configured optical network.

US Pat. No. 10,036,861

CONNECTOR ASSEMBLIES FOR OPTOELECTRONIC MODULES

Finisar Corporation, Sun...

9. An optoelectronic assembly comprising:at least one transmitter or at least one receiver;
a sleeve defining a sleeve opening sized and shaped to receive an optically transmissive portion of an optical fiber;
a housing defining a housing cavity at least partially enclosing the transmitter or the receiver, the housing comprising a lens port defining a lens port opening;
a fiber stub positioned at least partially in the sleeve opening and the lens port opening, the fiber stub defining a channel extending at least partially around a circumference of the fiber stub;
a second channel defined between the fiber stub and the lens port, the second channel including a flared configuration to permit the fiber stub to be adjusted in the lens port; and
a receptacle defining a receptacle opening, wherein the lens port, the sleeve and the fiber stub are positioned at least partially in the receptacle opening.