Infinera Patent Grants

Efficient processing of high data rate signals with a configurable frequency domain equalizer

Granted: March 21, 2017
Patent Number: 9602219
An optical system includes an optical transmitter configured to modulate an optical signal to carry data, associated with an optical channel, via multiple sub-carriers in a quantity greater than four. The optical system further includes an optical receiver configured to demodulate the optical signal to recover the data from the multiple sub-carriers.

Controlling an optical transmitter that supports multiple modulation formats and baud rates

Granted: February 21, 2017
Patent Number: 9577761
A device receives a modulation format and a baud rate for transmission of an optical signal, and generates optical signals based on the modulation format and the baud rate. The device generates quadrature-delay-interferometer signals based on the optical signal, the modulation format, and the baud rate, and generates a particular optical signal with a particular wavelength for the modulation format and the baud rate. The device determines whether a point of the…

Frequency domain coded modulation with polarization interleaving for fiber nonlinearity mitigation in digital sub-carrier coherent optical communication systems

Granted: January 24, 2017
Patent Number: 9553675
An optical transmitter may receive and encode a first group of bits into first encoded data and second encoded data. The optical transmitter may supply a first sub-carrier carrying a first symbol and a second sub-carrier carrying a second symbol. The first symbol and the second symbol may be based on the first encoded data and the second encoded data, respectively, such that the first sub-carrier has a first polarization state comprising first and second polarization components, and the…

Systems, apparatus, and methods for non-blocking switch networks

Granted: January 17, 2017
Patent Number: 9548944
A switch network may include a plurality of switch stages arranged in sequential stages. The plurality of switch stages may include a first switch stage connected to a plurality of inputs, a second switch stage connected to each switch in the first switch stage, a third switch connected to each switch in the second switch stage, a fourth switch stage connected to each of the switches in the third switch stage, and a fifth switch stage connected to a plurality of outputs and each switch…

Efficient storage architecture for low-density parity-check decoding

Granted: January 10, 2017
Patent Number: 9543984
A low-density parity-check (LDPC) decoder may comprise a shift register configured to receive LDPC coded data, perform an iteration associated with decoding the LDPC coded data, and provide a result of performing the iteration. The shift register may include a quantity of lanes corresponding to a quantity of data words received by the shift register at a particular clock cycle, a quantity of stages corresponding to a quantity of clock cycles needed to perform the iteration, a quantity of…

Arbitrary grid wavelocking using digitally generated out-of-band tones

Granted: January 3, 2017
Patent Number: 9537577
A device may insert a set of tones into a transmitter signal at a set of frequency offsets from a set of transmitter channels associated with a set of transmitter channel wavelengths. The set of transmitter channels may include a first channel being associated with a first quantity of bandwidth and a second channel associated with a second quantity of bandwidth. The first quantity of bandwidth may be different from the second quantity of bandwidth. The device may repeatedly adjust the…

Optical fiber track system and method for using thereof

Granted: December 13, 2016
Patent Number: 9519117
A track system comprises a track having a first end, a second end, and defining one or more first channels extending from the first to the second end of the track for accommodating one or more optical fibers therein. The track is attachable to a support and defines a first plane. The track system also comprises a ramp having a first end, a second end, and defining one or more second channels extending from the first end of the ramp to the second end of the ramp for accommodating the one…

Code design and high-throughput decoder architecture for layered decoding of a low-density parity-check code

Granted: November 8, 2016
Patent Number: 9490845
A low-density parity-check (LDPC) decoder may receive LDPC coded data. The LDPC decoder may perform a decoding iteration associated with decoding the LDPC coded data. The decoding iteration may be performed by processing a group of layers. Each layer may include a corresponding set of check node elements, and may be processed by causing each check node element, of the set of check node elements corresponding to the layer, to update a set of variable node elements, connected to the check…

Optical link protection using common modulation of multiple combined wavelengths

Granted: November 1, 2016
Patent Number: 9485012
An optical transmitter may include one or more lasers configured to provide a primary optical signal having a primary wavelength and a secondary optical signal having a secondary wavelength to a modulator via corresponding first and second modulator inputs. The modulator may combine the primary and secondary optical signals into a combined optical signal and modulate, with an electrical signal, the combined optical signal to provide a modulated optical signal to an optical filter. The…

Optical layer status exchange over OSC-OAM method for ROADM networks

Granted: November 1, 2016
Patent Number: 9485015
A method for receiving, by circuitry of an optical node adapted for wavelength multiplexing and wavelength switching, a signal over OSC comprising overhead information indicative of status of at least one of an optical layer in an OTN; wherein the signal utilizes OC-N frame format comprising a first STS frame, a second STS frame, and a third STS frame, the STS frames having a format wherein the information is assigned to a number of bits designated for OAM information, wherein the bits…

Adjusting carrier spacing in a channel

Granted: November 1, 2016
Patent Number: 9485049
An optical system may include optical transmitters to provide respective optical signals. Each of the respective optical signals may provide one or more carriers in an optical channel. The optical channel may include multiple carriers associated with the respective optical signals. First and second carriers, of the multiple carriers, may have a particular carrier space width. The particular carrier space width may include a frequency error associated with one or more optical signals of…

OTU4 one level de-multiplexing spatial framer for G.709 optical transport networks

Granted: October 25, 2016
Patent Number: 9479849
A method may include generating, by a device, a set of bit masks associated with locating frame alignment signal (FAS) data. The set of bit masks may be utilized by multiple framer circuits associated with identifying a start of one more frames of multiple lower order Optical channel Data Unit (ODU) flows multiplexed in a higher order ODU flow. The method may include detecting, by the device, the FAS data at a particular byte location in a particular lower order ODU flow, of the multiple…

Rapid automation front-end framework library and executable graphic user interface testing system and method

Granted: September 27, 2016
Patent Number: 9454463
A computer system comprising a display, one or more computer readable medium storing a computer application comprising computer executable code for creating a graphical user interface, one or more processors receiving and executing the computer executable code to provide the graphical user interface on the display, the computer readable medium also storing a testing application comprising computer executable code for activating the graphical user interface, the testing application…

Assignment of wavelengths to optical signals in an optical network

Granted: September 13, 2016
Patent Number: 9445166
A method may include determining, by a device, a wavelength identifier graph corresponding to an optical network based on a set of lightpath conflicts, for a set of optical signals, associated with a set of links and a set of nodes of the optical network. One or more optical signals may be associated with transmission via a super-channel. The method may further include selectively assigning, by the device, a wavelength identifier to an optical signal, of the set of optical signals, based…

Optical communication system having tunable sources

Granted: August 16, 2016
Patent Number: 9419742
Consistent with one example of the disclosed implementations, a photonic integrated circuit (PIC) may be provided that includes s group of lasers and an arrayed waveguide grating (AWG) disposed on a substrate. Each laser in the group may supply an optical signal, such that each optical signal has a different wavelength. Each laser may be tunable to at least two designated wavelengths, which are separated from one another by a free spectral range (FSR) of the AWG. As a result, the optical…

Broadband waveguide based optical coupler

Granted: August 9, 2016
Patent Number: 9411104
An apparatus having a first waveguide, a second waveguide, a third waveguide, a fourth waveguide, and a fifth waveguide is described. A symmetric coupler has a proximal end and a distal end. The proximal end of the symmetric coupler is coupled to and in optical communication with the first waveguide and the second waveguide. The distal end of the symmetric coupler is coupled to and in optical communication with the fourth waveguide. An asymmetric coupler has a proximal end and a distal…

Optical transfer linearity using test tones

Granted: August 2, 2016
Patent Number: 9407375
An optical system may have an optical transmitter including a digital signal processor to receive a signal channel, determine a digital signal associated with the signal channel based on information in a look-up table and based on a test tone, and output the digital signal. The optical system may further have a digital-to-analog converter to convert the digital signal to an analog signal, a laser to provide an optical signal, and a modulator to receive the optical signal and the analog…

Digital link viewer

Granted: July 19, 2016
Patent Number: 9397898
A system may receive a user input that identifies an optical route in an optical network, and may receive a user input that identifies a view type, where the view type includes a data channel view or a control channel view. The system may provide, based on the user input, a user interface that displays a representation of network entities associated with the optical route, a representation of an amplification capability associated with a network entity, a representation of a first…

Interconnect bridge assembly for photonic integrated circuits

Granted: July 12, 2016
Patent Number: 9389441
A photonic transmitter, comprises a modulator driver having a first and second output ports, a photonic integrated transmitter circuit having a modulator having a first and a second input line, and a first input port electrically coupled with the first input line and a second input port electrically coupled with the second input line, and an interconnect bridge assembly, including a first termination resistor, a second termination resistor, and a substrate. An impedance-controlled…

Light absorption and scattering devices in a photonic integrated circuit that minimize optical feedback and noise

Granted: July 5, 2016
Patent Number: 9383512
A photonic integrated circuit is provided that may include a substrate; one or more optical sources, on the substrate, to output light associated with a corresponding one or more optical signals; one or more waveguides connected to the one or more optical sources; a multiplexer connected to the one or more waveguides; and one or more light absorptive structures, located on the substrate adjacent to one of the one or more optical sources, one of the one or more waveguides, and/or the…