US Pat. No. 9,063,308

SMALL FORM-FACTOR PLUGGABLE OPTICAL TRANSCEIVER

Source Photonics (Chengdu...

1. A small form-factor pluggable optical transceiver, comprising:
a switchboard having a connector; and
a casing connected to said switchboard via said connector, said casing configured to accommodate optical devices and electrical
devices and comprising an internal thermal isolator configured to divide the casing into a first cavity and a second cavity,
wherein said optical devices are positioned outside said switchboard during normal operation, and the internal thermal isolator
has an electrical feed therein to electrically connect one side of said internal thermal isolator close to said first cavity
with another side of said internal thermal isolator close to said second cavity.

US Pat. No. 9,325,421

BURST-MODE LASER CONTROL CIRCUIT AND THE METHOD THEREOF

Source Photonics (Chengdu...

1. A burst-mode laser control circuit, comprising:
a) an automatic power control (APC) loop;
b) a laser;
c) a diode; and
d) a burst-mode control circuit comprising a switch in series with the diode and parallel to the laser, the switch being enabled
or disabled by external logic, thereby providing burst-mode control of the laser.

US Pat. No. 9,054,813

OPTICAL TRANSCEIVER WITH ISOLATED MODULATOR CONTACTS AND/OR INPUTS

Source Photonics (Chengdu...

1. A multi-channel optical transmitter, comprising:
a first light source configured to emit light of a first wavelength;
a second light source configured to emit light of a second wavelength, wherein said second wavelength is the same as or different
from said first wavelength;

a first modulator configured to receive and modulate said light of said first wavelength to produce a first optical signal,
said first modulator having a first anode, a first cathode, and first and second contacts to the first anode and the first
cathode that receive a first differential driver signal from a first driver; and

a second modulator configured to receive and modulate said light of said second wavelength to produce a second optical signal,
said second modulator having a second anode and a second cathode electrically isolated from said first anode and said first
cathode, and third and fourth contacts to the second anode and the second cathode that receive a second differential driver
signal from a second driver, wherein the third and fourth contacts are electrically isolated from the first and second contacts,

wherein said first and second modulators are on a common substrate.

US Pat. No. 9,157,791

ACTIVELY ALIGNED DETECTORS FOR OPTICAL AND OPTOELECTRONIC ARRAYS

Source Photonics (Chengdu...

1. A multi-channel optical or optoelectronic device, comprising:
a demultiplexer configured to (i) receive a multi-channel optical signal having each of a plurality of wavelengths or wavelength
bands and (i) separate the multi-channel optical signal into individual optical signals, each individual optical signal having
a unique wavelength or wavelength band;

a plurality of detectors on or affixed to a detector mounting substrate, wherein each detector is configured to detect light
having one of the unique wavelengths or wavelength bands, each unique wavelength or wavelength band of the plurality of wavelengths
or wavelength bands corresponding to a channel of the multi-channel optical or optoelectronic device; and

a corresponding plurality of lenses on or affixed to an interior surface of the multi-channel optical or optoelectronic device,
each of the plurality of lenses configured to focus light of the unique wavelength or wavelength band towards a corresponding
one of the detectors, wherein each detector has a location aligned with an actual focal point of the light having the unique
wavelength or wavelength band focused by a corresponding one of the lenses.

US Pat. No. 9,590,737

MULTI-CHANNEL, PARALLEL TRANSMISSION OPTICAL MODULE, AND METHODS OF MAKING AND USING THE SAME

Source Photonics (Chengdu...

1. A multi-channel, parallel transmission, small form-factor pluggable (SFP) optical module, comprising:
a multi-channel SFP chassis,
a first transmitter optical subassembly (TOSA) receiving a first multi-mode fiber stub,
a second transmitter optical subassembly (TOSA) receiving a second multi-mode fiber stub,
a third transmitter optical subassembly (TOSA) receiving a third multi-mode fiber stub,
a fourth transmitter optical subassembly (TOSA) receiving a fourth multi-mode fiber stub, and
a MT fiber connector having a first port with a plurality of fiber connectors therefrom and a second port connected to an
array-type optical receiver, wherein:

said first TOSA, said second TOSA, said third TOSA and said fourth TOSA are in parallel on the chassis, and
said first multi-mode fiber stub, said second multi-mode fiber stub, said third multi-mode fiber stub and said fourth multi-mode
fiber stub are connected to the fiber connectors of the MT fiber connector.

US Pat. No. 9,628,195

TRANSIMPEDANCE AMPLIFIER (TIA) HAVING AN ENLARGED DYNAMIC RANGE AND OPTICAL DEVICES USING THE SAME

Source Photonics (Chengdu...

16. A method of receiving and/or amplifying an optical signal, comprising:
a) receiving the optical signal in an optical receiver;
b) converting the optical signal to an electrical signal;
c) determining a power or signal strength of the optical signal;
d) comparing an input voltage corresponding to the electrical signal with a high predetermined value and a low predetermined
value using a hysteresis circuit, the hysteresis circuit comprising (1) an amplifier having a first input terminal, a second
input terminal and an output terminal and (2) a third resistor connected between the first input terminal and the output terminal
of said amplifier;

e) selecting a first resistance and/or impedance value of a transimpedance amplifier (TIA) receiving the electrical signal
when the input voltage is higher than the high predetermined value and a second resistance and/or impedance value of the TIA
greater than the first resistance and/or impedance value when the input voltage is lower than the low predetermined value;
and

f) amplifying the electrical signal using the TIA.

US Pat. No. 9,653,878

CIRCUIT, OPTICAL MODULE, METHODS AND OPTICAL COMMUNICATION SYSTEM FOR DUAL RATE POWER POINT COMPENSATION

Source Photonics (Chengdu...

1. An optical transmitter, comprising:
a laser driver;
a transmitter optical subassembly (TOSA), comprising a laser connected to the laser driver, and a monitoring photodiode (MPD)
receiving light from said laser and providing a feedback current to said laser driver, wherein said laser driver and said
laser operate in a first mode and a second mode;

a current divider comprising a resistor connected to said MPD and a switch between the resistor and ground, wherein the current
divider is configured to reduce said feedback current from said MPD when said laser operates in said first mode;

an analog-to-digital converter (ADC) configured to convert the feedback current, a mirrored feedback current, or a reduced
feedback current to a digital signal, wherein the mirrored feedback current and the reduced feedback current are produced
or generated from the feedback current;

a microprocessor configured to receive the digital signal, turn on said switch in the first mode and turn off said switch
in the second mode;

wherein said laser driver is configured to determine the output power of said laser from said feedback current reduced by
said current divider in the first mode, and directly from said feedback current in the second mode.

US Pat. No. 9,638,736

DC LEVEL DETECTION CIRCUIT BETWEEN HIGH SPEED SIGNAL LINE CONNECTING PORTS, A SYSTEM INCLUDING THE CIRCUIT, AND METHODS OF MAKING AND USING THE SAME

Source Photonics (Chengdu...

1. A detection circuit between signal line connecting ports, comprising:
a first resistor connected to a first port of the signal line connecting ports and to a ground potential;
a second resistor connected to a second port of the signal line connecting ports and to a DC voltage source having a voltage
VCC, the second resistor having a resistance (R2) at least 5 times a resistance of the first resistor (R1), and the voltage VCC, the resistance R1 and the resistance R2 have values satisfying Vcc*R1/(R1+R2)<0.8V; and

a low pass filter connected at a first node or terminal to the second port and at a second node or terminal to a signal detection
port.

US Pat. No. 9,628,191

METHODS, OPTICAL TRANSMITTER, OPTICAL MODULE, AND OPTICAL COMMUNICATION SYSTEM FOR IMPROVING THE MONITORING AND/OR REPORTING ACCURACY OF A LASER TRANSMITTING POWER

Source Photonics (Chengdu...

1. A method for controlling an output power of an optical transmitter, comprising:
measuring an output power value of the optical transmitter at 25° C.;
measuring the output power value of the optical transmitter at N additional individual temperatures to obtain N tracking error
values (TE values) corresponding to said N additional individual temperature values, where N is an integer that is equal to
or greater than 1;

creating a lookup table covering an operating temperature range of the optical transmitter including said N individual temperature
values based on one-to-one mapping between said TE values and said N additional individual temperature values; and

after creating said lookup table and when said optical transmitter is in operation, reporting at an electrical digital diagnostic
and/or monitoring interface of said optical transmitter an operating temperature of said optical transmitter, a corresponding
one of said TE values from said lookup table, and an optical output power of said optical transmitter.

US Pat. No. 9,832,916

EMI SHIELDING DEVICE FOR AN OPTICAL TRANSCEIVER

Source Photonics (Chengdu...

1. An EMI shielding device for an optical transceiver, comprising:
a shell with an optical interface at a first end and an electrical interface at a second end,
wherein said shell includes a base and an upper cover,
said upper cover comprises an upper cover plate and at least two flanks, each flank having an upper cover lateral plate that
extends downward and that includes a lower end or surface,

said base comprising a base plate having at least two flanks, each flank having a base side baffle,
an engagement structure comprising one or more tongues or tabs on one of the upper cover and the base, and one or more grooves
or slots on the other of the upper cover and the base, the one or more tongues or tabs being insertable into the one or more
grooves or slots;

at least said upper cover plate being between the base side baffles,
each lower end or surface of said upper cover lateral plates adjacent to the optical interface has serrations thereon, wherein
the serrations comprise a conductive material and are absent in regions of the upper cover lateral plates in or near the electrical
interface, and

said EMI shielding device further comprises a conductive gasket under the serrations and in contact with the base, wherein
the base comprises a locating groove that accommodates the conductive gasket, has a width of up to 1.5 times a width of the
conductive gasket, and a depth of up to 5 times a height of the conductive gasket.

US Pat. No. 9,709,759

NXN PARALLEL OPTICAL TRANSCEIVER

Source Photonics (Chengdu...

1. A parallel optical transceiver, comprising:
a) a printed circuit board, wherein one end of the printed circuit board includes a signal input interface;
b) a laser comprising a plurality of laser chips spaced apart by at least about 0.1 mm and that have a numerical aperture
of 0.4 ?m on the printed circuit board configured to simultaneously provide laser beams having a first common wavelength;

c) a laser driving control chip configured to control the laser, and directly integrated onto or into the printed circuit
board;

d) a multimode fiber array having N channels, N being an integer of at least 2;
e) a band-pass filter configured to allow the laser beams to pass through to the multimode fiber array;
f) a first GRIN lens and a second GRIN lens that flank the band-pass filter and are fixed to the printed circuit board, wherein
the first GRIN lens is configured to focus the laser beams, and the second GRIN lens is configured to refocus the laser beams
on a location in or on the multimode fiber array after the laser beams pass through the band-pass filter; and

g) a photodiode array.

US Pat. No. 9,843,383

MULTIFUNCTIONAL LASER DIODE DRIVING CIRCUIT, A MODULE COMPRISING THE SAME, AND A METHOD USING THE SAME

SOURCE PHOTONICS (CHENGDU...

9. A multifunctional laser driving circuit, comprising:
a signal transmitter module comprising a laser,
a controller electrically connected to said signal transmitter module,
a first laser driver receiving a first enable/disable signal from the controller and providing a first electrical signal to
the laser, and

a second laser driver receiving a second enable/disable signal from the controller and providing a second electrical signal
to the laser,

wherein said laser is configured to (i) convert said first electrical signal to a first optical signal when the first laser
driver is enabled and the second laser driver is disabled, the first optical signal having a first frequency, (ii) convert
said second electrical signal to a second optical signal when the first laser driver is disabled and the second laser driver
is enabled, the second optical signal having a second frequency less than the first frequency, (iii) combine said first and
second optical signals into a compound signal when the first laser driver and the second laser driver are enabled, and (iv)
transmit the first optical signal, the second optical signal, and the compound signal over a same optical transmission medium.