COHERENT DETECTION FOR AN INTEGRATED CIRCUIT HAVING A MULTIPLEXER OR A DEMULTIPLEXER WITH A SHARED PROPAGATION REGION
Granted: January 2, 2014
Application Number:
20140003763
An optical device may include a slab, a first waveguide extending from a first portion of the slab to supply multiple first optical signals to the first portion of the slab, multiple second waveguides coupled to a second portion and to a third portion of the slab. The optical device may include multiple third waveguides provided extending from a fourth portion of the slab to direct a corresponding one of the multiple first optical signals away from the slab, a fourth waveguide extending…
DIGITAL LINK VIEWER
Granted: January 2, 2014
Application Number:
20140006961
A system may receive first user input that identifies an optical route in an optical network, may receive a second user input that identifies a view type, and may provide, based on the first user input and the second user input, a user interface. The user interface may display, based on the identified view type, a representation of components associated with the optical route, a representation of ports on each of the components, a representation of a first parameter associated with each…
DIGITAL LINK VIEWER
Granted: January 2, 2014
Application Number:
20140006959
A system may receive a first user input that identifies an optical route in an optical network, may receive a second user input that identifies a direction with which to display the optical route, and may provide, based on the first user input and the second user input, a user interface. The user interface may display optical links associated with the optical route, and may display network entities associated with the optical route. The user interface may display a source entity, where…
DIGITAL LINK VIEWER
Granted: January 2, 2014
Application Number:
20140006958
A system may receive a user input that identifies an optical route in an optical network, and may provide a user interface based on the user input. The user interface may display a representation of network entities associated with the optical route, may display a representation of components of the network entities associated with the optical route, and may display a representation of optical links that connect two of the components. The user interface may also display a representation…
DIGITAL LINK VIEWER
Granted: January 2, 2014
Application Number:
20140006957
A system may receive a first user input that identifies an optical route in an optical network, may receive a second user input that identifies a direction with which to display the optical route, and may provide, based on the first user input and the second user input, a user interface. The user interface may display optical links associated with the optical route, and may display network entities associated with the optical route. The user interface may display a source entity, where…
DIGITAL LINK VIEWER
Granted: January 2, 2014
Application Number:
20140006956
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…
EQUALIZATION MECHANISM FOR PROCESSING TRAFFIC BASED ON THREE-QUADRATURE AMPLITUDE MODULATION (3QAM)
Granted: January 2, 2014
Application Number:
20140003824
A system receives four-bit symbols that correspond to traffic associated with a three-bit phase modulation scheme and are encoded based on a four-bit phase modulation scheme. The system determines values with which to perform equalization that enable the four-bit symbols to be restored to a condition that existed prior to being transmitted to the system. The system performs, using the values, equalization on a four-bit symbol that includes at least a first pair of bits associated with a…
PROCESSING THREE-QUADRATURE AMPLITUDE MODULATION (3QAM) TRAFFIC USING A FOUR-BIT PHASE MODULATION SCHEME
Granted: January 2, 2014
Application Number:
20140003814
A system receives traffic that includes four-bit symbols, the four-bit symbols being encoded using a four-bit phase modulation scheme; and processes the traffic to recover a four-bit symbol. The system also decodes the recovered four-bit symbol to obtain a three-bit symbol. The three-bit symbol is associated with a three-quadrature amplitude modulation (3QAM) scheme, and the decoding is performed without creating an error, within the traffic, when cycle slip occurs. The system outputs…
OPTICAL BANDWIDTH MANAGER
Granted: January 2, 2014
Application Number:
20140003812
A system may receive user input that identifies network entities in an optical network. The system may provide a user interface that displays a representation of the network entities and of optical link types configured to carry optical signals among the network entities. The system may receive user input that identifies a particular optical link type, and may display a representation of optical links, of the particular optical link type, that are associated with the network entities.…
POLARIZATION MATERIAL ON AN OPTICAL MULTIPLEXER OR AN OPTICAL DEMULTIPLEXER
Granted: January 2, 2014
Application Number:
20140003764
An optical device may include a substrate and an arrayed waveguide grating provided on the substrate. The arrayed waveguide grating may include a first slab or a second slab and multiple waveguides extending therebetween. The optical device may also include a layer of material provided on one of the first slab or second slab. The layer of material may have a thickness such that first light may have a first polarization is absorbed by the material and second light may have a second…
SHARED PROPAGATION REGION FOR AN OPTICAL MULTIPLEXER OR AN OPTICAL DEMULTIPLEXER
Granted: January 2, 2014
Application Number:
20140003759
An optical system may include an optical multiplexer or demultiplexer circuit having a slab with a propagation region. The propagation region may have a first propagation section and a second propagation section, such that a portion of the first propagation section and a portion of the second propagation section overlap each other to form a shared propagation section. The shared propagation section may include both the portion of the first propagation section and the portion of the…
ROTATOR EXTERNAL TO PHOTONIC INTEGRATED CIRCUIT
Granted: January 2, 2014
Application Number:
20140001347
An optical system may include a polarization beam splitter having an input that receives multiple optical signals, a first output and a second output. The first output may provide components of the multiple optical signals having a first polarization. The second output may provide components of the multiple optical signals having a second polarization. The optical system may include a rotator having an input that receives the components to rotate the first polarization such that each of…
OSPFTE EXTENSION TO SUPPORT GMPLS FOR FLEXIBLE GRID
Granted: November 21, 2013
Application Number:
20130308945
A method and system are disclosed in which a link state advertisement message (LSA) conforming to a Generalized Multiprotocol Label Switching (GMPLS) routing protocol is generated and transmitted. The LSA is associated with a TE Link between a transmit node and a receive node in a network. The transmit node supplies a plurality of optical signals, each of which has a plurality of frequencies, the frequencies being allocated among a plurality of spectral portions such that the plurality…
Optimal Segment Identification for Shared Mesh Protection
Granted: November 7, 2013
Application Number:
20130294228
Nodes and methods are disclosed, including, circuitry of a source node in a mesh network retrieving information indicative of network topology; identifying a working path from the source node to a destination node; identifying potential protection segments of the working path, wherein a potential protection segment has at least one disjoint protection path available for the segment; creating a hypothetical network topology comprising the nodes of the working path and hypothetical links…
REDUCING PROCESSING COMPLEXITY AND COST ASSOCIATED WITH A SOFT FORWARD ERROR CORRECTION (FEC) OPERATION
Granted: October 3, 2013
Application Number:
20130262954
A system is configured to receive a word on which to perform forward error correction; identify least reliable positions that correspond to encoded bits, within the word, associated with a lowest level of reliability; generate candidate words based on different combinations of inverted encoded bits; identify a pair of candidate words that includes a candidate word and another candidate word, the candidate word includes an inverted most reliable bit of the encoded bits within the…
ITERATIVE FORWARD ERROR CORRECTION (FEC) ON SEGMENTED WORDS USING A SOFT-METRIC ARITHMETIC SCHEME
Granted: October 3, 2013
Application Number:
20130262084
A system is to receive a word on which to perform error correction; obtain segments, from the word, each segment including a respective subset of samples; update, on a per segment basis, the word based on extrinsic information associated with a previous word; identify sets of least reliable positions (LRPs) associated with the segments; create a subset of LRPs based on a subset of samples within the sets of LRPs; generate candidate words based on the subset of LRPs; identify errors…
REDUCING PROCESSING BIAS IN A SOFT FORWARD ERROR CORRECTION (FEC) DECODER
Granted: October 3, 2013
Application Number:
20130259492
A system is configured to receive a word that includes a group of samples; randomly select a subset of the samples; identify first samples, from the subset, with a lowest level of reliability; select another subset of the samples; identify second samples, from the other subset, with a lowest level of reliability; and create a merged subset based on selected first samples and selected second samples. The system is also configured to select a further subset of the samples; identify third…
FORWARD ERROR CORRECTION (FEC) CONVERGENCE BY CONTROLLING RELIABILITY LEVELS OF DECODED WORDS IN A SOFT FEC DECODER
Granted: July 4, 2013
Application Number:
20130173984
A system receives a first word on which to perform error correction; identifies combinations in which encoded bits, within the first word, can be inverted; generates candidate words based on the first word and the combinations; decodes the candidate words; determines distances between the decoded words and the first word; selects, as a second word, one of the decoded words associated with a shortest distance; compares the second word to the first word to identify errors within the first…
PHASE-MODULATED TRANSMISSION CONTROL USING EMBEDDED CONTROL SYMBOLS
Granted: July 4, 2013
Application Number:
20130170831
A system receives a phase-modulated signal that carries client symbols and a sequence that includes first symbols on which a first tone is to be based and having a first power level, and second symbols on which a second tone is to be based and having a second power level; processes the sequence to generate the first tone and the second tone; determines a power difference based on the first power level and the second power level; retrieves condition information that identifies a threshold…
SUPER OPTICAL CHANNEL TRANSPORT UNIT SIGNAL SUPPORTED BY MULTIPLE WAVELENGTHS
Granted: May 2, 2013
Application Number:
20130108268
A node is configured to receive first optical channel data unit (ODU) signals; encapsulate one or more of the first ODU signals into a second ODU signal; encapsulate the second ODU signal into an optical channel transport unit (OTU) signal; and transmit the OTU signal on one or more optical channels.
