Digital nonlinear phase compensator for legacy submarine cables
Granted: May 25, 2021
Patent Number:
11018767
A method and system are herein disclosed. A coherent optical receiver receives a first optical data carrier signal at a first instant of time and a second optical data carrier signal at a second instant of time, generates at least four first data streams from the first optical data carrier signal and at least four second data streams from the second optical data carrier signal; and circuitry calculates a first aggregate power of the first data streams and a second aggregate power of the…
Independently routable digital subcarriers with configurable spacing for optical communication networks
Granted: April 27, 2021
Patent Number:
10992389
Optical network systems and components are disclosed, including a transmitter comprising a digital signal processor receiving a plurality of independent data streams, and supplying a plurality of digital subcarrier outputs, based on the plurality of independent data streams, and configurable to vary the frequency spacing between two or more of the plurality of digital subcarrier outputs; the transmitter configured to output a modulated optical signal including a plurality of optical…
Scalable synthesis of signals of high symbol rate using lower symbol rate DSPS
Granted: April 13, 2021
Patent Number:
10979270
Methods, systems, and apparatus, including computer programs encoded on computer storage media, for transmitting signals with a high data rate. In some implementations, an apparatus includes a first digital signal processor outputting first data at a first data rate. A second digital signal processor outputting second data at a second data rate. A filter circuitry receiving and up-sampling the first and second data. Additionally, the apparatus includes a combiner circuit that receives…
Bidirectional optical communications
Granted: April 6, 2021
Patent Number:
10972184
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…
Streaming telemetry for optical network devices
Granted: March 30, 2021
Patent Number:
10966005
A telemetry manager receives, from a network server, global data collection information about network components in an optical network device. The global data collection information includes identifiers for network nodes in the network components from which telemetry data are to be collected, and reporting frequency and encoding format for sending collected telemetry data to the network server. The telemetry manager identifies, from the global data collection information, local data…
Synchronization for subcarrier communication
Granted: March 30, 2021
Patent Number:
10965439
Methods, systems, transceivers, and apparatus are included for clock synchronizing an optical system and multiple leaf systems. In some implementations, a transceiver includes a receiver and a transmitter. The receiver includes an optical hybrid circuit operable to receive a first modulated optical signal and local oscillator light and to supply optical mixing products based on the first modulated optical signal and the local oscillator light. A photodiode circuit operable to supply an…
Out-of-band communication channel for sub-carrier-based optical communication systems
Granted: March 30, 2021
Patent Number:
10965378
Techniques are described for implementing an out-of-band communication channel used to exchange control channel information in sub-carrier-based optical communication systems. In an example implementation, an apparatus includes an optical tap coupled to an optical communication path carrying a modulated optical signal carrying a plurality of optical subcarriers. The optical tap has a first output configured to supply a first portion of the modulated optical signal and a second output…
Low-cost nano-heat pipe
Granted: March 30, 2021
Patent Number:
10962296
A method of fabricating a heat pipe may include providing a first material as a body section. The method may include stamping or etching the body section to include the cavity. A portion of the body section may constitute a wall of the cavity. The method may include stamping or etching the wall of the cavity to provide a set of corrugations on a portion of the wall of the cavity. The method may include forming an opening in the wall of the cavity. The method may include attaching a lid…
Multilayer packet optical communication networks
Granted: February 9, 2021
Patent Number:
10917363
An optimized communication network may include an edge switch capable of transporting and switching L1 and L2 traffic and configured to selectively transport and switch L2 traffic using L1 protocols.
Reconstruction of an optical network link in a link viewer based on a text file
Granted: February 2, 2021
Patent Number:
10911321
A device may be configured to receive a text file including network information for an optical network. The network information may include information for an optical route in the optical network. The device may generate a user interface based on the text file. The user interface may display a representation of the optical route. The device may provide the user interface for display and receive a user input via the user interface. The device may change the representation of the optical…
Clock recovery for subcarrier based coherent optical systems
Granted: February 2, 2021
Patent Number:
10911150
Methods, systems, and apparatus, including computer programs encoded on computer storage media, for clock recovery in subcarrier based coherent optical systems. In one aspect, an apparatus includes a plurality of phase detectors configured to generate a plurality of phase detection outputs by detecting a plurality of digital signals associated with a plurality of frequency bands, each of the plurality of phase detection outputs being associated with a respective one of the plurality of…
End point mapping service to assist transport segment routing
Granted: November 17, 2020
Patent Number:
10841211
Methods, devices, and systems for mapping transport segment labels to packet network endpoints using a mapping server. In some implementations, an end point address in an edge domain is received from an edge router, a mapping of one of the end point address to a transport segment label is received from a network device, the mapping is stored in a non-transitory memory device, and the mapping is transmitted to the edge router.
Method and system to prevent false restoration and protection in optical networks
Granted: November 3, 2020
Patent Number:
10824351
Systems and methods are described in which circuitry of a first controller of a first node receives a first signal indicating an optical loss of signal within the first path. Circuitry of a second controller of the first node on the first path within a transport network generates a second signal indicating a failure within the first path. The first controller accessing a network topology database determines that restoration of the first path would be ineffective due to there being no…
Fast restoration using SDFEC defects in coherent optical networks
Granted: October 6, 2020
Patent Number:
10797824
Methods, nodes and control modules are disclosed. In the method, circuitry of a first node in a mesh network converts an optical layer in a working path between the first node and a second node, to a data stream in a digital layer. The working path carries data traffic from the first node to the second node in the optical layer of the mesh network when there is no failure in the working path. Circuitry of the first node in the mesh network detects a failure in the working path due to…
Method and apparatus for rapid recovery of optical power after transient events in C+L band optical networks
Granted: September 22, 2020
Patent Number:
10784955
An optical device having an amplifier and a controller is described. The amplifier is configured to amplify an optical signal in at least one of the C-Band or the L-Band. The controller includes a processor and a non-transitory computer readable medium. The non-transitory computer readable medium storing computer executable code that when executed by the processor causes the processor to: select a target tilt and gain setting from a plurality of target tilt and gain settings stored in…
Modulation format change and license updating
Granted: September 8, 2020
Patent Number:
10769605
One or more servers may receive an instruction to change a modulation format, associated with one or more optical channels, from a first modulation format to a second modulation format; provide the instruction to change the modulation format to a network device, associated with the one or more optical channels, to cause the network device to change the modulation format, associated with the one or more optical channels, from the first modulation format to the second modulation format;…
Individually routable digital subcarriers
Granted: August 11, 2020
Patent Number:
10742328
Consistent with an aspect of the present disclosure, electrical signals or digital subcarriers are generated in a DSP based on independent input data streams. Drive signals are generated based on the digital subcarriers, and such drive signals are applied to an optical modulator, including, for example, a Mach-Zehnder modulator. The optical modulator modulates light output from a laser based on the drive signals to supply optical subcarriers corresponding to the digital subcarriers.…
Tunable waveguide devices
Granted: August 11, 2020
Patent Number:
10741999
Methods, systems, and apparatus, including a laser including a layer having first and second regions, the first region including a void; a mirror section provided on the layer, the mirror section including a waveguide core, at least part of the waveguide core is provided over at least a portion of the void; a first grating provided on the waveguide core; a first cladding layer provided between the layer and the waveguide core and supported by the second region of the layer; a second…
System architecture for power control in an optical transmission line
Granted: August 4, 2020
Patent Number:
10735092
An optical network is described that has a first ROADM node, a second ROADM node, and an optical transmission line establishing optical communication between the first ROADM node and the second ROADM node. The optical transmission line including an in-line amplifier node having a total input power and a total output power. The in-line amplifier node has a first monitoring tool configured to measure input optical power of the in-line amplifier node, and a second monitoring tool configured…
Method of control for the maintenance of the optical power in a ROADM network
Granted: July 28, 2020
Patent Number:
10727936
Methods, systems, and optical power controllers are disclosed. Various problems caused by the use of a single L0 power controller in the prior art are addressed by using first and second L0 power controllers with the first L0 power controller managing first optical components with the optical network, and the second L0 power controller managing second optical components within the optical network.
