Finisar Patent Grants

Component alignment

Granted: February 4, 2020
Patent Number: 10551578
A system may include a substrate and a lens component. The substrate may include pads and solder protuberances. Each solder protuberance may be located on a pad. The lens component may define grooves sized to receive at least a portion of the solder protuberances. The lens component may be positioned relative to the substrate such that at least a portion of each solder protuberance is positioned within the grooves.

Latch mechanism for communication module

Granted: January 28, 2020
Patent Number: 10545302
Some embodiments include a latch mechanism and an optoelectronic module that includes the latch mechanism. The latch mechanism may include a driver, a follower, a pivot member, and a cam member. The driver may be configured to rotate relative to a housing of the optoelectronic module about an axis of rotation between a latched position and an unlatched position. The follower may be configured to be move when the driver rotates between the latched and unlatched position. The follower may…

Phase-transforming optical reflector formed by partial etching or by partial etching with reflow

Granted: January 21, 2020
Patent Number: 10539723
A reflective optical element includes a reflective surface comprising a multitude of discrete recessed and non-recessed areas arranged along the reflective surface. The discrete areas are arranged to approximate a desired phase function (typically modulo 2?) and are smaller than an operational wavelength in order to provide a range of phase delays needed to adequately approximate the desired phase function. Effecting at least partial reflow of one or more optical media or reflective…

Cross-point offset adjustment circuit

Granted: December 17, 2019
Patent Number: 10511294
A differential signal offset adjustment circuit may include a first circuit for receiving a first one of a differential input signal and generating a first one of a differential output signal with positive offset based on a differential offset signal. The circuit may further include a second circuit for receiving a second one of a differential input signal and generating a second one of a differential output signal with a negative offset based on the differential offset signal.

Echelle grating multiplexer or demultiplexer

Granted: December 3, 2019
Patent Number: 10495813
In one example embodiment, an integrated silicon photonic wavelength division demultiplexer includes an input waveguide, an input port, a plurality of output waveguides, a plurality of output ports, a first auxiliary waveguide, and a plurality of auxiliary waveguides. The input waveguide may be formed in a first layer and having a first effective index n1. The input port may be optically coupled to the input waveguide. The output waveguides may be formed in the first layer and may have…

Electromagnetic radiation shielding on a PCI express card

Granted: November 26, 2019
Patent Number: 10488894
An example embodiment includes an electromagnetic radiation (EMR) shield. The EMR shield is configured to reduce EMR from escaping a host device. The EMR shield includes a structure, two or more module-grounding tabs, and multiple fingers. The structure is configured to substantially surround two or more adjacent transceiver modules positioned in an opening defined in a bezel. The two or more module-grounding tabs extend from the structure. Each of the module-grounding tabs is configured…

Adiabatic polarization rotator-splitter

Granted: November 26, 2019
Patent Number: 10488590
Various polarization rotator splitter (PRS) configurations are disclosed. In an example embodiment, a system includes a PRS that includes a silicon nitride (SiN) rib waveguide core that includes a rib and a ridge that extends vertically above the rib, the SiN rib waveguide core having a total height hSiN from a bottom of the rib to a top of the ridge, a rib height hrib from the bottom of the rib to a top of the rib, a rib width wrib, and a top width wSiN of the ridge. The rib width wrib…

DC offset cancellation and crosspoint control circuit

Granted: November 19, 2019
Patent Number: 10484213
A circuit and method in an amplifier circuit for filtering a DC offset in differential input signals and inserting a programmable adjustable crosspoint offset in differential output signals. An amplifier circuit includes a differential amplifier circuit configured to amplify differential input signals into differential output signal. The amplifier circuit further includes a feedback circuit coupled between the differential output signals and the differential input signals. The feedback…

Waveguide routing configurations and methods

Granted: November 12, 2019
Patent Number: 10473858
An optical waveguide may include a silicon portion and a silicon nitride portion positioned over the silicon portion. The silicon portion may include a taper that decreases a width of the silicon portion. The optical waveguide may include a transition between a loaded single mode or multimode waveguide to a single mode waveguide. The silicon nitride portion may confine optical signals traveling through the optical waveguide in the silicon portion.

Aluminum nitride substrate with graphite foil

Granted: November 5, 2019
Patent Number: 10470302
A printed circuit board may include 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. 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. The printed circuit…

Optical module with integrated lens

Granted: November 5, 2019
Patent Number: 10466427
In an embodiment, an optoelectronic module includes a printed circuit board (PCB) and a lens block. The printed circuit board (PCB) includes at least one of an optical transmitting or receiving array. The lens block may be configured for directly coupling light between one of the optical transmitting or receiving array to optical fibers in an optical cable. A method may include directly coupling light between one of an optical transmitting or receiving array and a lens block, and further…

Polarization diverse wavelength selective switch

Granted: October 29, 2019
Patent Number: 10461878
Described herein is a wavelength selective switch (WSS) type optical switching device (1) configured for switching input optical beams from input optical fiber ports (3, 5 and 7) to an output optical fiber port (9). Device (1) includes a wavelength dispersive grism element (13) for spatially dispersing the individual wavelength channels from an input optical beam in the direction of a second axis (y-axis). The optical beams propagate from input ports (3, 5 and 7) in a forward direction…

Distributed reflector laser

Granted: October 29, 2019
Patent Number: 10461503
A distributed reflector (DR) laser may include a distributed feedback (DFB) region and a distributed Bragg reflector (DBR). The DFB region may have a length in a range from 30 micrometers (?m) to 100 ?m and may include a DFB grating with a first kappa in a range from 100 cm?1 to 150 cm?1. The DBR region may be coupled end to end with the DFB region and may have a length in a range from 30-300 ?m. The DBR region may include a DBR grating with a second kappa in a range from 150 cm?1 to 200…

Dispersion-compensative optical assembly

Granted: October 29, 2019
Patent Number: 10459169
An optical assembly includes a first grating device configured to: receive a light beam that includes an optical signal with a particular wavelength from a fiber; and change a propagation direction of the optical signal according to the particular wavelength of the optical signal. The optical assembly also includes a second grating device configured to: receive the optical signal outputted from the first grating device; change the propagation direction of the optical signal according to…

Track and hold amplifiers

Granted: October 22, 2019
Patent Number: 10454591
An embodiment includes a track and hold amplifier device. A device may include an emitter follower transistor coupled to each of an input and an output. The device may also include a charging node coupled between the output and a voltage supply, wherein the charging node is also coupled to the input via the emitter follower transistor. Further, the device may include a cascode switch coupled to each of the input and the output. The cascode switch may be configured to cause the emitter…

Interconnect structure for coupling an electronic unit and an optical unit, and optoelectronic module

Granted: October 1, 2019
Patent Number: 10433447
An optoelectronic module is provide and includes an electronic unit, an optical unit, and an interconnect structure. The electronic unit is capable of outputting and/or receiving electric signals, while the optical unit is capable of converting the electric signals into optical signals. The interconnect structure connects the electronic unit and the optical unit, and includes an electrically conducting substrate and a pair of transmission leads connecting electronic unit and the optical…

Loss of signal detector

Granted: October 1, 2019
Patent Number: 10432305
A loss of signal (LOS) detector may include a comparator including a first input, a second input and an output indicating a LOS status. The LOS detector further includes circuitry to compare a first signal on the first input generated by differential input signals and a threshold signal common mode with a second signal on the second input generated by differential threshold signals at a first level and an input signal common mode. The circuit further configured to generate a LOS…

Transceiver to transceiver digital optical commands

Granted: September 17, 2019
Patent Number: 10419116
A system may include a first module at a far end, and an optical fiber coupled to the first module. The system may also include a second module at a near end that is configured to generate and transmit instructions to the first module to control operation of the first module.

Negative angle grating coupler

Granted: September 17, 2019
Patent Number: 10416385
In an example, a system includes a grating coupled laser and a photonic integrated circuit. The grating coupled laser includes a first waveguide and a transmit grating coupler optically coupled to the first waveguide. The photonic integrated circuit includes a second waveguide and a receive grating coupler optically coupled to the second waveguide. The second grating coupler may include a negative angle grating coupler.

Adiabatic polarization rotator combiner

Granted: September 3, 2019
Patent Number: 10401566
A system may include a polarization rotator combiner. The polarization rotator combiner may include a first stage, a second stage, and a third stage. The first stage may receive a first component of light with a TE00 polarization and a second component of light with the TE00 polarization. The first stage may draw optical paths of the first and second components together. The second stage may receive the first component and the second component from the first stage. The second stage may…