Distribution matching for probabilistic constellation shaping with an arbitrary input/output alphabet
Granted: February 13, 2024
Patent Number:
11902079
Consistent with the present disclosure, an encoder circuit is provided at a transmit side of an optical fiber link that maps an input sequence of bits of fixed length k a sequence of symbols of a codeword of length n, such that the symbols of the codeword define a predetermined transmission probability distribution. Preferably, each symbol of the codeword is generated during a corresponding clock cycle, such that after n clock cycles, a complete codeword corresponding to the input bit…
Optical subcarrier dual-path protection and restoration for optical communications networks
Granted: February 13, 2024
Patent Number:
11901950
An example system includes a first network device having first circuitry. The first network device is configured to perform operations including receiving data to be transmitted to a second network device over an optical communications network, and transmitting first information and second information to the second device. The first information is indicative of the data, and is transmitted using a first communications link of the optical communications network and using a first subset of…
Distribution matching for probabilistic constellation shaping with an arbitrary input/output alphabet
Granted: February 13, 2024
Patent Number:
11902079
Consistent with the present disclosure, an encoder circuit is provided at a transmit side of an optical fiber link that maps an input sequence of bits of fixed length k a sequence of symbols of a codeword of length n, such that the symbols of the codeword define a predetermined transmission probability distribution. Preferably, each symbol of the codeword is generated during a corresponding clock cycle, such that after n clock cycles, a complete codeword corresponding to the input bit…
Optical subcarrier dual-path protection and restoration for optical communications networks
Granted: February 13, 2024
Patent Number:
11901950
An example system includes a first network device having first circuitry. The first network device is configured to perform operations including receiving data to be transmitted to a second network device over an optical communications network, and transmitting first information and second information to the second device. The first information is indicative of the data, and is transmitted using a first communications link of the optical communications network and using a first subset of…
Clock recovery for digital subcarriers for optical networks
Granted: January 23, 2024
Patent Number:
11881898
Optical network systems and components are disclosed, including a transmitter comprising a digital signal processor that receives data; circuitry that generate a plurality of electrical signals based on the data; a plurality of filters, each of which receiving a corresponding one of the plurality of electrical signals, a plurality of roll-off factors being associated with a respective one of the plurality of filters; a plurality of DACs that receive outputs from the digital signal…
Optical subcarrier dual-path protection and restoration for optical communications networks
Granted: January 9, 2024
Patent Number:
11870496
An example system includes a first network device having first circuitry. The first network device is configured to perform operations including receiving data to be transmitted to a second network device over an optical communications network, and transmitting first information and second information to the second device. The first information is indicative of the data, and is transmitted using a first communications link of the optical communications network and using a first subset of…
Method apparatus, and computer readable medium for defining and encoding packets for data exchange over a network
Granted: January 9, 2024
Patent Number:
11868704
Systems, methods, and devices for encoding and decoding a packet buffer for data exchange over a communications network, including parsing a data container definition file to determine a packet format; generating a code file based on the data container definition file; inserting the code file into a source tree of an application; compiling the source tree to generate an executable file; and executing the executable on a computing device in communication with the communications network,…
Subcarrier modulation with radio frequency (RF) IQ modulators
Granted: December 26, 2023
Patent Number:
11855754
Methods, systems, and apparatus for subcarrier modulation with radio frequency inphase-quadrature (IQ) modulators. A system includes a plurality of IQ modulators, each configured to receive an input electrical signal comprising an inphase signal and a quadrature signal, and each configured to modulate the inphase signal and quadrature signal based on one of a plurality of local oscillator signals to output a multiplexed signal. Each of the plurality of local oscillator signals is…
Out-of-band communication channel for subcarrier-based optical communication systems
Granted: December 5, 2023
Patent Number:
11838052
An example system includes a hub transceiver and a plurality of edge transceivers. The hub transceiver is operable to transmit, over a first communications channel, a first message to each of the edge transceivers concurrently, including an indication of available network resources on an optical communications network. Each of the edge transceiver is operable to transmit, transmit, over a second communications channel, a respective second message to the hub transceiver including an…
Bidirectional optical communications
Granted: December 5, 2023
Patent Number:
11838105
This disclosure describes digitally generating sub-carriers (SCs) to provide isolation and dynamic allocation of bandwidth between uplink and downlink traffic between transceivers that are communicatively coupled via a bidirectional link including one or more segments of optical fiber. Separate uplink and downlink communication channels may be created using digitally generated SCs and using the same transmitter laser. In some implementations, one or more of the nodes include a…
SD-FEC defect propagation across regeneration nodes in support of single and multi-carrier super channel protection in ROADM networks
Granted: December 5, 2023
Patent Number:
11838048
A regen node is described. The regen node includes a coherent receiver, a control module and a coherent transmitter. The coherent receiver has circuitry to convert a first optical signal received from an upstream node in an optical layer of an optical network to a first digital data stream in a digital layer having a first FEC frame and a data traffic. The control module extracts a first fault signal from the first FEC frame; generates a second fault signal based at least in part on the…
Subcarrier based data center network architecture
Granted: November 21, 2023
Patent Number:
11824632
Methods, systems, and apparatus, including computer programs encoded on computer storage media, for generating, transmitting, directing, receiving, and processing optical subcarriers. In some implementations, a system includes a Tier 1 switch that supplies a plurality of data channels; a transmitter that receives the plurality of data channels, the transmitter including an optical modulator that supplies a plurality of optical subcarriers based on the plurality of data channels; an…
Frequency division multiple access optical subcarriers
Granted: November 21, 2023
Patent Number:
11824628
A hub node may or have a capacity greater than that of associated leaf nodes. Accordingly, inexpensive leaf nodes may be deployed to receive data carrying optical signals from, and supply data carrying optical signals to, the hub node. One or more connections may couple each leaf node to the hub node, each connection including one or more segments of optical fibers, optical amplifiers, optical splitters/combiners, and optical add/drop multiplexer. Optical subcarriers may be transmitted…
Transmitting and receiving data using a satellite communications network
Granted: November 14, 2023
Patent Number:
11817901
An example apparatus includes an optical transmitter, an optical splitter, lenses, and mirrors. The optical splitter has an input and several outputs. The input of the optical splitter is optically coupled to the transmitter, such that each of the outputs of the optical splitter is operable to supply a corresponding one of a plurality of modulated optical signals, each of which includes a plurality of optical subcarriers. Each of the lenses is optically coupled to a respective one of the…
Opto-electronic package and a method for making an opto-electronic package
Granted: October 31, 2023
Patent Number:
11803021
Opto-electronic packages and methods for making opto-electronic packages are disclosed, including a method comprising forming an opto-electronic circuit on a first surface of a substrate of a lower package assembly, the first surface of the substrate having a first bonding pattern configured to provide a hermetic seal, the first bonding pattern extending around the opto-electronic circuit; positioning a bottom of a ring frame onto the first bonding pattern so as to surround the…
Digital tone-based apparatus and method for measuring the frequency response of coherent optical transmitters
Granted: October 24, 2023
Patent Number:
11799558
An optical network component, system, and method are herein described. The system and method include introducing an amplitude modulated (AM) tone and data to an optical modulator generating a modulated optical signal, measuring an amplitude response of the AM tone within the modulated optical signal, calculating a frequency response based on the amplitude response, and calibrating the optical modulator with the frequency response.
Optical channel power control system and method
Granted: October 17, 2023
Patent Number:
11791924
Systems and methods are disclosed, including a method comprising receiving power loss measurement parameters for components of an optical transmission system comprising a first node having a preamplifier, the first node configured to transmit and receive optical signals on a number of optical channels to and from one or more first transceivers; a second node configured to transmit and receive optical signals on the number of optical channels to and from one or more second transceivers;…
Frequency division multiple access optical subcarriers
Granted: October 17, 2023
Patent Number:
11791893
A network or system in which a hub or primary node may communicate with a plurality of leaf or secondary nodes. The hub node may operate or have a capacity greater than that of the leaf nodes. Accordingly, relatively inexpensive leaf nodes may be deployed to receive data carrying optical signals from, and supply data carrying optical signals to, the hub node. One or more connections may couple each leaf node to the hub node, whereby each connection may include one or more spans or…
Method and apparatus for a restoration network with dynamic activation of pre-deployed network resources
Granted: September 26, 2023
Patent Number:
11770186
An optical network having a first terminal node, a second terminal node, and a network service system is described. The first terminal node has a plurality of ports and a signal restoration component to create a restored path. The second terminal node has a plurality of ports and a failure monitor to issue a path failure notice. A working path, a protection path, and the restored path are each fiber optic lines optically coupling the first terminal node to the second terminal node to…
Error floor performance improvement of generalized product codes
Granted: September 26, 2023
Patent Number:
11770137
Systems and methods for improving the error floor performance in decoding generalized product codes (GPC) are described. The systems and methods can implement a two stage process to decode a GPC block code and break a stall error pattern for the decoding the block code. In the first stage, erroneuous bits in a codeword can be flagged. In the second stage, some of these bits and related bits in a codeword can be toggled to generate one or more test patterns. The test patterns can be…
