Biasing assembly for a latching mechanism
Granted: May 31, 2016
Patent Number:
9354407
An example embodiment includes a communication module. The communication module includes 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. The biasing assembly includes a latch cover configured to be attached to the shell, a slider, and a spring. The slider is configured to operate a latching mechanism…
Multi-laser transmitter optical subassembly
Granted: May 24, 2016
Patent Number:
9350454
Multi-laser transmitter optical subassembly (TOSA). In one example embodiment, a method of fabricating a multi-laser TOSA includes various acts. First, first and second optical signals are transmitted from first and second lasers, respectively. Next, the angle of a first collimating lens is actively adjusted to cause the second optical signal to be aligned with the first optical signal as the first optical signal passes through a first filter and as the second optical signal is reflected…
Pin cadence for high-speed connectors
Granted: May 24, 2016
Patent Number:
9348102
A connector includes pins having a pinout including a functional designation cadence. The functional designation cadence includes a first ground pin, a first signal pin, a no-connect pin, a second signal pin, and a second ground pin, where 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 and second signal pins, and the second signal pin is positioned between the no-connect pin and the second ground…
Latch mechanisms for modules
Granted: May 24, 2016
Patent Number:
9348101
Latch mechanisms for modules are disclosed. A module includes a housing and a release slide. The housing includes a first rib located on a first side of the housing and a second rib located on a second side of the housing. The release slide is slidingly positioned on the housing. The release slide includes a release slide base, a first release slide arm extending from the release slide base, and a second release slide arm extending from the release slide base. A first flange extending…
Multiplexer/demultiplexer based on diffraction and reflection
Granted: May 24, 2016
Patent Number:
9348091
Transmissive diffraction grating(s), reflector(s), and multiple optical sources/receivers are arranged such that each one of multiple optical signals at corresponding different wavelengths co-propagating along a multiplexed beam path would: (i) be transmissively, dispersively diffracted at a multiplexed transmission region of a grating; (ii) propagate between the multiplexed transmission region and multiple demultiplexed transmission regions of a grating undergoing reflection(s) from the…
Chip on flex optical subassembly
Granted: May 10, 2016
Patent Number:
9337932
One example embodiment includes an optical subassembly (OSA). The OSA includes a flex circuit, an optical port, and an active optical component subassembly. The flex circuit is constructed of at least one electrically-conductive layer and at least one electrical insulator layer. The optical port defines a barrel cavity and is mechanically coupled to the flex circuit at a flex connection. The active optical component subassembly is positioned within the barrel cavity and electrically…
Aluminum nitride substrate
Granted: April 26, 2016
Patent Number:
9326373
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…
Method and apparatus for demodulating and regenerating phase modulated optical signals
Granted: April 26, 2016
Patent Number:
9325425
A DPSK/DQPSK receiver includes an optical splitter that separates the received DPSK/DQPSK optical signal according to an optical power splitting ratio into a plurality of received optical signals. A plurality of optical filters passes a plurality of filtered received optical signals. A plurality of optical detectors generates a plurality of electrical detection signals, each with a power that is related to a power of a respective filtered optical signal. A plurality of amplifiers…
Polarization-dependent loss compensator
Granted: April 26, 2016
Patent Number:
9323001
In an embodiment, a polarization-dependent loss (PDL) compensator includes a substrate, an anti-reflective coating, and a partial reflective coating. The substrate has an input surface and an output surface opposite the input surface. The anti-reflective coating is formed on the output surface. The partial reflective coating is formed on the input surface. The PDL compensator may include PDL that depends on an incident angle of an optical signal with respect to the partial reflective…
VCSEL with integrated electrically modulated intra-cavity graphene absorber
Granted: April 19, 2016
Patent Number:
9318872
A VCSEL can include a graphene intra-cavity absorber having at least one graphene region and at least one dielectric region adjacent to the graphene region. The VCSEL can also include a graphene electrode electronically coupled with at least one graphene region. The VCSEL can also include a contact region adjacent with at least one dielectric region. The VCSEL can also include a contact electrode electronically coupled with the contact region. The VCSEL can also include a base electrode…
Gallium arsenide avalanche photodiode
Granted: April 19, 2016
Patent Number:
9318639
An avalanche photodiode can include: 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 optionally 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…
Pixel test in a liquid crystal on silicon chip
Granted: April 12, 2016
Patent Number:
9310420
An example embodiment includes a continuity testing method of a pixel in a liquid crystal on silicon integrated circuit. The method includes writing a first voltage to a pixel. The pixel is isolated and a wire that is selectively coupled to the pixel is discharged. The method also includes enabling a sensing amplifier configured to sense voltage on the wire. The pixel is electrically coupled to the wire and a resultant voltage on the wire is sensed.
Communication module latching mechanism
Granted: April 12, 2016
Patent Number:
9309908
An example embodiment includes a latching mechanism configured to selectively secure a communication module to a receptacle of a host device. The latching mechanism includes a latch, a cam, and a latch release. The latch includes a latch hook and a latch protrusion. The cam is mechanically coupled to the latch release. The cam is 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…
Integrated power supply for fiber optic communication devices and subsystems
Granted: April 5, 2016
Patent Number:
9306546
An example embodiment includes a fiber optic integrated circuit (IC). The fiber optic IC includes an integrated power supply. The integrated power supply includes a filter, an active switch, and a pulse width modulator (“PWM”). The filter is configured to convert a signal to an output signal of the integrated power supply. The active switch is configured to control introduction of the signal to the filter. The PWM is configured to generate a PWM output signal that triggers the active…
Optical beam steering for tunable laser applications
Granted: March 29, 2016
Patent Number:
9298023
Methods for tuning a transmitter to a selected wavelength are disclosed. A transmitter including a laser array comprising a plurality of lasers spatially offset from one another and each having a laser output having a unique wavelength. A first prism is positioned to impart a first angular shift to the laser outputs to produce and a second prism is positioned to impart a second angular shift opposite the first angular shift on the outputs. An index modulating element is coupled to one of…
Multi directional multiplexer
Granted: March 15, 2016
Patent Number:
9288559
Described herein is an optical transmission cross-connect for routing wavelength signals to a bank of directionless transceivers. One embodiment (1) includes an array of four common-port fibers (3) for transmitting and receiving a multiplexed optical signal and an array of sixteen add/drop fibers (5) for receiving and transmitting demultiplexed signals including individual wavelength channels. A dispersive grism (7) simultaneously spatially separates the wavelength channels from the…
Optical fiber securing device
Granted: February 23, 2016
Patent Number:
9268106
An optical fiber securing device may include a passage, an epoxy well, an epoxy path, an optical fiber seat, and a protrusion. The passage may have an entrance and an exit, the passage configured to receive therein an optical fiber inserted through the entrance. The epoxy well may be configured to receive therein epoxy. The epoxy path may provide a pathway for epoxy between the epoxy well and the passage. The optical fiber seat may be configured to receive at least a portion of the…
Thermal management structures for optoelectronic systems
Granted: February 2, 2016
Patent Number:
9250027
An example embodiment includes a thermal management system for an active cable connector. The system includes a shell and a back plate. The shell defines a cavity and includes multiple heat-transfer areas on an internal shell surface. A first heat-transfer area is positioned with respect to a first heat-generating component to absorb a first portion of thermal energy generated by the first heat-generating component. The back plate is positioned with respect to the first heat-generating…
Smart optical transceiver having integrated optical dying gasp function
Granted: January 26, 2016
Patent Number:
9246590
An optical transceiver includes an electric terminal that can receive power from a host equipment and provide a power supply voltage to the optical transceiver, and a power failure monitor circuit that can detect an imminent loss of the power supply voltage. The power failure monitor circuit can 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 can receive the…
Optical channel monitor
Granted: January 12, 2016
Patent Number:
9235006
Described herein is an optical channel monitor (100), including a plurality of input ports in the form of optical fibers (102) disposed in a vertical “port displacement” dimension. Each fiber (102) inputs a respective optical beam (103) having a plurality of individual wavelength channels. A lens (104) collimates each beam and converges the beams in the port displacement dimension to a focal plane (105). The collimated and converged beams are incident onto a rotatable…
