Infinera Patent Grants

Reduction of wavelength selective switch (WSS) filter-based impairment using selective subcarrier adjustment

Granted: August 15, 2017
Patent Number: 9735913
A method may include transmitting, by an optical device, a first channel. The first channel may have a first set of subcarriers. The first channel may be attenuated during transmission by a filter associated with a wavelength selective switch. The method may further include transmitting, by the optical device, a second channel. The second channel may have a second set of subcarriers. The second channel may be attenuated during transmission by the filter associated with the wavelength…

Using artificial justifications to apply noise shaping to actual justifications associated with mapping client data

Granted: August 8, 2017
Patent Number: 9729245
A transmitter may receive client data, associated with a client rate, to be mapped to frames associated with a server rate. The transmitter may generate justifications associated with the mapping of the client data to the frames. The transmitter may create, based on the justifications, artificial justifications that include information associated with justifications created to shape phase variations present in a recovered client clock associated with the client rate. The phase variations…

High-capacity switch

Granted: August 8, 2017
Patent Number: 9729946
Consistent with the present disclosure, an optical switch is provided that switches multiple wavelength division multiplexed (WDM) optical signals. Each of the WDM signals includes optical signals having the same wavelengths. The WDM signals are supplied to optical splitters, which supply power split portions of the WDM signals to corresponding optical gates. Groups of the optical gates are associated with a corresponding switching block, which may include a cyclical arrayed waveguide…

Systems and methods for discovery of a controller in openflow networks

Granted: August 8, 2017
Patent Number: 9729948
Systems and methods for discovery of a controller in an OpenFlow network may include using an OpenFlow capable switch to discover the controller without the help of other components, such as DHCP. The link discovery protocol may be configured on the switch and the discovery process may use an out-of-band or an in-band communication. In one example, a link discovery protocol packet is sent out of all ports of a switch that meet the eligibility criteria. The response is guaranteed because…

Polarization tracking using signal tone information while keeping least mean squares frequency domain equalization

Granted: July 25, 2017
Patent Number: 9716564
A digital signal processor (DSP) of an optical receiver may receive information representing a polarization multiplexed signal including tone information. The polarization multiplexed signal may have an uncorrected state of polarization (SOP). The DSP may determine sets of Stokes parameters based on the tone information. The DSP may determine a set of polarization parameters based on the sets of Stokes parameters. The DSP may apply, based on the set of polarization parameters, a set of…

Clamp interconnect

Granted: July 18, 2017
Patent Number: 9711879
An apparatus including a bridge member and a clamp is disclosed. The bridge member is positioned in a first plane and has a substrate with a first surface and a second surface; and a plurality of distinct conductive pillars formed on the second surface of the substrate. The clamp has a body, a proximal end and a distal end. The body is positioned in a second plane above the first plane with the second plane being within 2 degrees of parallel to the first plane. The proximal end is…

In-service skew monitoring in a nested Mach-Zehnder modulator structure using pilot signals and balanced phase detection

Granted: July 11, 2017
Patent Number: 9705592
An apparatus is provided. The apparatus may include a drive circuit that selectively supplies a first plurality of electrical signals and a second plurality of electrical signals to a modulation circuit. Based on the first plurality of electrical signals, the modulation circuit may output a first in-phase component being modulated in accordance with a first tone having a first frequency and a first quadrature component being modulated in accordance with a second tone having a second…

Demand advertisement method for shared mesh protection path computation

Granted: July 11, 2017
Patent Number: 9705786
A method includes the steps of: (1) generating, by circuitry of a first node, an advertising message including (a) a working path bandwidth demand; (b) an identification of at least two communication links in a shared risk link group of the working path; and (c) at least one protecting path and a bitmap indicative of failure of at least one first communication link in the shared risk link group that causes the at least one protecting path to be used; and (2) transmitting the advertising…

Distributing control plane processing

Granted: July 11, 2017
Patent Number: 9705822
A network device includes shelf controllers and interface unit controllers. An interface unit controller, of the interface unit controllers, is configured to receive a message from a different network device; determine whether a session exists for the message; identify a shelf controller, of the shelf controllers, based on the session when the session exists for the message; select the shelf controller, to receive the message, based on a load or mapping of the shelf controller when the…

Tracking nonlinear cross-phase modulation noise and linewidth induced jitter in coherent optical fiber communication links

Granted: June 6, 2017
Patent Number: 9673911
An optical receiver may include a digital signal processor to receive an input sample that includes transmitted data, transmitted by an optical transmitter, and nonlinear distortion. The digital signal processor may process the input sample to generate an estimated data value. The estimated data value may be an estimate of the transmitted data. The digital signal processor may remove the estimated data value from the input sample to generate a noise sample. The digital signal processor…

Wavelength selective switch (WSS) based multiplexing architecture

Granted: May 23, 2017
Patent Number: 9660752
An apparatus may include a plurality of wavelength selective switches (WSSs). The apparatus may include a plurality of transmitters. The transmitters may transmit a plurality of super-channels. The apparatus may include a plurality of passive power splitters corresponding to the plurality of transmitters. The plurality of passive power splitters may receive the plurality of super-channels. The plurality of passive power splitters may generate a respective set of power-split…

Reduction of wavelength selective switch (WSS) filter-based impairment using multi-channel forward error correction averaging via interleaving

Granted: May 23, 2017
Patent Number: 9661407
A method may include interleaving, by an optical device, a set of bits of a first channel with a set of bits of a second channel. The first channel may include first forward error correction (FEC) data associated with the set of bits of the first channel and the second channel may include second FEC data associated with the set of bits of the second channel. The method may further include transmitting first information via the first channel and second information via the second channel.…

Goal-based network routing

Granted: May 16, 2017
Patent Number: 9654388
A device receives network information associated with a network to be planned and including a multiple traffic requirements for the network, and identifies the multiple traffic requirements in the network information. The device allocates a first route in the network for a traffic requirement of the multiple traffic requirements, and determines that a second route for at least one other traffic requirement, of the multiple traffic requirements, is removed based on the route for the…

License management system

Granted: May 9, 2017
Patent Number: 9648020
A license management system comprises at least one processor capable of executing processor-executable code coupled with a non-transitory processor-readable medium storing a master license database and processor-executable code for causing the processor to: (a) store a master state of a network device indicative of at least one license key associated with the network device in the master license database; (b) access information indicative of a license key request for the network device…

Optical communication system having low latency

Granted: April 25, 2017
Patent Number: 9634788
Consistent with the present disclosure, an optical communication system is provided in which client data is input to a first node and output from a second node, spaced from the first node, with little delay. In one example, the delay is reduced by including higher order Raman amplifiers that provide a substantially uniform gain along the length of a fiber optic link, thereby reducing the number of EDFAs that may otherwise be installed along the optical fiber link or eliminating such…

Configurable frequency domain equalizer for dispersion compensation of multiple sub-carriers

Granted: April 18, 2017
Patent Number: 9628180
A system may include an optical transmitter and an optical receiver. The optical transmitter may generate optical signals associated with sub-carriers, and may provide the optical signals via an optical link. The optical receiver may receive the optical signals via the optical link, and may generate samples based on the optical signals. The samples may be associated with the sub-carriers. The optical receiver may combine the samples to form a time domain sample vector having a particular…

Optical communication system

Granted: April 11, 2017
Patent Number: 9621274
Consistent with the present disclosure a transmitter is provided that transmits data in either a “quasi-DP-BPSK” (“QDP”) mode or in a DP-QPSK mode. In the QDP mode, data bits are transmitted as changes in phase between first and second phase states along a first axis or as changes in phase between third and fourth phase states along a second axis in the IQ plane. Although the transmitter outputs an optical signal that changes in phase between each of the four states, a sequence…

Multi layer, multi vendor, multi domain, applications for software defined networking enabled networks

Granted: April 11, 2017
Patent Number: 9621968
Systems and methods are disclosed including a computer system, comprising a software defined networking configuration manager having a processor computing and provisioning paths through an optical transport network for multiple switch nodes to be provisioned as head end nodes, the processor managing and interpreting data indicative of managed entities within the optical transport network to create a first network Sub-Network Connection (SNC) for a first customer, and a second network SNC…

Management and control of software defined networking enabled open transport networks

Granted: April 11, 2017
Patent Number: 9621969
Apparatuses are disclosed including a node having a switch for communicating traffic from input interface to output interface; and a control module, located proximate to the input interface, output interface and switch, comprising a communication interface configured to connect to a third communication link external to the node and having a processor accessing network node configuration information and being configured to compute a path to a destination node through the output interface…

Power control of optical signals having different polarizations

Granted: April 4, 2017
Patent Number: 9614639
Consistent with an aspect of the present disclosure, an optical communication apparatus is provided that transmits a WDM signal including a plurality of optical channels, wherein each channel has a corresponding one of a plurality of wavelengths. Each of the plurality of optical channels includes optical signals having first (e.g., TE) and second (e.g., TM) polarizations. In one example, each polarized optical signal is modulated in accordance with an identifying tone. The optical…