Sunnyvale, CA, United States
Sunnyvale, CA, United States

Finisar Corporation is a manufacturer of optical communication components and subsystems. In 2008, Finisar merged with Optium Corporation. Wikipedia.


Time filter

Source Type

Patent
Finisar | Date: 2017-05-03

A circuit (200) may include an input terminal (202, 203) configured to receive an input signal with a first voltage swing and an output terminal (204, 205). The circuit may also include a first transistor (220), a second transistor (221), a third transistor (222), and a control circuit (210). The control circuit may be coupled to the input terminal (202, 203), a gate terminal of the first transistor (220), and a gate terminal of the second transistor (221). The control circuit may be configured to adjust voltages provided to the gate terminals based on the input signal (202, 203) such that the first transistor (220) conducts in response to the input signal being at a first logical level and the second transistor (221) conducts in response to the input signal being at a second logical level to generate an output signal (204, 205) output on the output terminal (204, 205). The second voltage swing of the output signal (204-205) may be different from the first voltage swing of the input signal (202-203).


Patent
Finisar | Date: 2017-05-03

A circuit may include first and second input nodes, first and second output nodes, first and second intermediate nodes, first and second resistances, a first amplification transistor coupled to the first input node, the first resistance, and the first intermediate node and a second amplification transistor coupled to the second input node, the second resistance, and the second intermediate node. The circuit may also include a first active device coupled to the first output node and the first intermediate node, a second active device coupled to the second output node and the second intermediate node, a first output transistor coupled to the first output node and configured to conduct based on a second intermediate signal on the second intermediate node, and a second output transistor coupled to the second output node and configured to conduct based on a first intermediate signal on the first intermediate node.


Patent
Finisar | Date: 2017-02-08

In an example embodiment, a WDM array includes an optical filter, N common ports, N reflection ports, and N pass ports. The N common ports may be positioned to a first side of the optical filter. N may be greater than or equal to two. The N reflection ports may be positioned to the first side of the optical filter. The N pass ports may be positioned to a second side of the optical filter opposite the first side.


Disclosed embodiments relate to an interconnect structure for coupling at least one electronic unit for outputting and/or receiving electric signals, and at least one optical unit for converting said electric signals into optical signals and/or vice versa, to a further electronic component. The interconnect structure comprises an electrically insulating substrate and a plurality of signal lead pairs to be coupled between said electronic unit and a front end contact region for electrically contacting said interconnect structure by said further electronic component. A ground plane layer is electrically insulated from said pairs of signal leads, wherein each pair of signal leads has a circuit connecting region for electrically contacting respective terminals of said at least one electronic unit, and wherein in a region adjacent to said 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 signal leads and separated from a respective neighboring clearance.


An optoelectronic transceiver includes an optoelectronic transmitter, an optoelectronic receiver, memory, and an interface. The memory is configured to store digital values representative of operating conditions of the optoelectronic transceiver. The interface is configured to receive from a host a request for data associated with a particular memory address, and respond to the host with a specific digital value of the digital values. The specific digital value is associated with the particular memory address received from the host. The optoelectronic transceiver may further include comparison logic configured to compare the digital values with limit values to generate flag values, wherein the flag values are stored as digital values in the memory.


Patent
Finisar | Date: 2017-02-27

A optical element (transmissive or reflective) includes a transmissive layer comprising two different optical media arranged among discrete volumes arranged along the layer. The discrete volumes 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.


The invention relates to a fiber optic communication system comprising an optical signal source adapted to receive a binary base signal having a bit period T, and generate a first signal, wherein the first signal is frequency modulated. According to the invention, the system comprises an optical spectrum reshaper (OSR) adapted to reshape the first signal into a second signal, wherein the second signal has an amplitude modulated component and a frequency modulated component, wherein the optical signal source comprises a laser, and wherein the frequency modulation is generated by modulating a phase of a laser cavity of the laser.


Patent
Finisar | Date: 2017-04-08

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 and are reflected from a liquid crystal on silicon (LCOS) device (11) in a return direction to output port (9). The input optical beams are transmitted through a port selecting module (21), which provides polarization diversity to device (1) and provides capability to restrict optical beams returning from LCOS device (11) from being coupled back into input ports (3, 5 and 7).


Patent
Finisar | Date: 2017-08-02

A differential TWE MZM includes a differential driver, first and second capacitors, and first and second terminations. The differential driver includes a first differential output and a second differential output that collectively form a differential pair. The first differential output is DC coupled to a cathode of a first arm optical phase shifter of a TWE MZM. The second differential output is DC coupled to a cathode of a second arm optical phase shifter of the TWE MZM. The first capacitor AC couples the second differential output to an anode of the first arm optical phase shifter. The second capacitor AC couples the first differential output to an anode of the second arm optical phase shifter. The first and second terminations are coupled to the cathode and the anode of, respectively, the first or second arm optical phase shifter.


A method and apparatus for characterizing and compensating optical impairments in an optical transmitter includes operating an optical transmitter comprising a first and second parent MZ, each comprising a plurality of child MZ modulators that are biased at respective initial operating points. An electro-optic RF transfer function is generated for each of the plurality of child MZ modulators. Curve fitting parameters are determined for each of the plurality of electro-optic RF transfer functions and operating points of each child MZ modulator are determined using the curve fitting parameters. An IQ power imbalance is determined using the curve fitting parameters. Initial RF drive power levels are determined that compensate for the determined IQ power imbalance. The XY power imbalance is determined for initial RF drive power levels using the curve fitting parameters. The operating RF drive powers are determined that at least partially compensate for the first and second IQ power imbalances and for the XY power imbalance for the optical transmitter.

Loading Finisar collaborators
Loading Finisar collaborators