Reduction of wavelength selective switch (WSS) filter-based impairment using differentiated channel modulation formats
Granted: September 4, 2018
Patent Number:
10070206
A method may include transmitting, by an optical device, a first set of channels using a first modulation format. The first set of channels 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 set of channels using a second modulation format. The second set of channels may be attenuated during transmission by the filter associated with the wavelength selective switch.…
Multi layer network resiliency with software defined orchestration
Granted: August 21, 2018
Patent Number:
10056973
Methods and systems are disclosed for storing, in a non-transitory memory device, multi-layer network information comprising at least one of link availability, bandwidth availability, priority levels for paths in a multi-layer network, path status in the multi-layer network, and status for network elements in the multi-layer network; receiving, via at least one input component, a message from a network element in the network comprising information indicative of a failure of a working…
Metastability error correction methods and circuits for asynchronous successive approximation analog to digital converter (SAR ADC)
Granted: August 7, 2018
Patent Number:
10044364
Methods and apparatuses are described herein for metastability error detection and correction in analog-to-digital converters (ADCs). For example, an ADC may comprise a comparator, a register circuit, a first circuit, and a second circuit. The comparator may generate a comparator output signal in response to a sampling clock signal. The register circuit, operatively coupled to the comparator, may process the comparator output signal. The first circuit, operatively coupled to the…
Proactive multi-layer mechanisms to protect packet-optical transport networks
Granted: July 31, 2018
Patent Number:
10038494
A method and apparatus for pro-active protection of packet-optical transport in a software defined network (SDN) controller are disclosed herein. The SDN controller may define a proactive protection threshold criterion based on based on a plurality of optical system performance metrics and may collect at least one measurement for each of the metrics. The SDN controller may then determine whether the proactive protection threshold criterion is met based on at least one of the collected…
Photonic integrated circuit package
Granted: July 31, 2018
Patent Number:
10037982
Methods, systems, and apparatus, including a photonic integrated circuit package, including a photonic integrated circuit chip, including multiple electrodes configured to receive the electrical signal, where at least one characteristics of a segment of the traveling wave active optical element is changed based on the electrical signal received by a corresponding electrode of the multiple electrodes; a ground electrode; and multiple bond contacts; and an interposer bonded to at least a…
Photonic integrated circuit package
Granted: July 17, 2018
Patent Number:
10026723
Methods, systems, and apparatus, including a photonic integrated circuit package, including a photonic integrated circuit chip, including a lumped active optical element; an electrode configured to receive an electrical signal, where at least one characteristics of the lumped active optical element is changed based on the electrical signal received by the electrode; a ground electrode; and a bond contact electrically coupled to the electrode; and an interposer bonded to at least a…
Channel carrying multiple digital subcarriers
Granted: July 3, 2018
Patent Number:
10014975
An optical system includes a transmitter module and/or a receiver module. The transmitter module is configured to receive input data, map the input data to a set of subcarriers associated with an optical communication channel, independently apply spectral shaping to each of the subcarriers, generate input values based on the spectral shaping of each of the subcarriers, generate voltage signals based on the input values, modulate light based on the voltage signals to generate an output…
Monolithic photonic integrated circuit (PIC) with a plurality of integrated arrays of laser sources and modulators employing an extended identical active layer (EIAL)
Granted: July 3, 2018
Patent Number:
10012797
A semiconductor monolithic transmitter photonic integrated circuit (TxPIC) comprises two different situations, either at least one signal channel in the PIC having a modulated source with the channel also extended to include at least one additional element or a plurality of modulated sources comprising N signal channels in the PIC of different transmission wavelengths, where N is equal to or greater than two (2), which may also approximate emission wavelengths along a standardized…
License management system
Granted: June 26, 2018
Patent Number:
10009349
In the disclosed method, a current state of a network device indicative of no license key being associated with a network device is stored in a license database. Information indicative of a master state of the network device is received, via an input port, including at least one license key associated with the network device. The current state of the network device is updated to include the at least one license key associated with the network device, and the updated current state is…
Passband abstraction layer
Granted: May 15, 2018
Patent Number:
9973294
A node in an optical network may include a wavelength selective switch (WSS) and a processor. The wavelength selective switch may have a plurality of input ports and a plurality of output ports for routing and/or power-controlling of optical slices. The wavelength selective switch may have a plurality of control passbands, each control passband including a one or more optical slices. The processor may determine a passband group (PBG) having a plurality of PBG passbands, each of the…
Feedback carrier recovery device
Granted: May 15, 2018
Patent Number:
9973280
A digital signal processor (DSP) may include a receiver configured to receive an input signal. The DSP may include a processor component to perform carrier recovery on a set of digital signals representing a set of symbols associated with the input signal. The DSP may include an output component to provide information included in the set of digital signals representing the set of symbols. The DSP may be configured to perform, for the input signal, phase estimation with a latency of less…
Apparatus and method for tuning a laser source emission wavelength employing a laser source contact comprising electrode segments
Granted: May 15, 2018
Patent Number:
9971090
A laser source or a plurality of laser sources in a photonic integrated circuit (PIC) are provided with an electrical contact that is either segmented or is connected to a series of vernier resistor segments for supply of current to operate the laser source. In either case, at least one segment of the laser contact or at least one vernier resistor segment can be trimmed in order to vary the amount of current supplied to the laser source resulting in a change to its current density and,…
System and method for virtual network topologies and VPN in multi-layer networks
Granted: April 17, 2018
Patent Number:
9949003
Systems and methods for a multi-layer network to achieve network resource isolation among clients using the same server network, such as a VPN in a multi-layered network and interaction within the node, may include interaction between a server layer (e.g. L0 Photonic network) and the client layer (e.g. L1 network) that help the client layer (L1) gather information about the server-layer (L0) connection affinities. For example, the use of server layer (L0) connection affinities to…
Systems and methods for provisioning ethernet services
Granted: April 3, 2018
Patent Number:
9935826
A centralized network administrator may automatically provision an Ethernet circuit between network elements by storing and managing circuit data (managed objects) in one of the network elements (master node) and synchronizing the circuit data among the network nodes in the Ethernet circuit path. In addition, multiple network administrators may provision multiple Ethernet circuits using the overlapping network elements by managing access to the circuit data in the Master node.
Reduction of wavelength selective switch (WSS) filter-based impairment using differentiated channel baud rates
Granted: March 27, 2018
Patent Number:
9929826
A method may include transmitting, by an optical device, a first set of channels using a first baud rate. The first set of channels may be attenuated during transmission by a filter associated with a wavelength selective switch. Transmitting, by the optical device, a second set of channels using a second baud rate. The second set of channels may be attenuated during transmission by the filter associated with the wavelength selective switch. The first set of channels and the second set of…
System and method for adaptive traffic engineering based on predicted traffic demand
Granted: March 27, 2018
Patent Number:
9929800
Systems and methods for adaptive and automated traffic engineering of data transport services may include learning the demand between devices and data paths based on application workloads, prediction of traffic demand and paths based on the workload history, provisioning and management of data paths (i.e. network links) based on the predicted demand, and real-time monitoring and data flow adaptation. Systems and methods for adaptive and automated traffic engineering of data transport…
Backward-recursive path computation using RSVP-TE
Granted: March 20, 2018
Patent Number:
9923805
One or more nodes, in a network, are configured to transmit a message, for computing diverse paths through the network from a first domain to a second domain using a Resource Reservation Protocol-Traffic Engineering (RSVP-TE) signaling protocol; generate at least one data structure that identifies multiple diverse entry points to the second domain; transmit the at least one data structure toward the first domain; complete the at least one data structure to form at least one completed…
Stacked cage optical module heat relay system
Granted: March 6, 2018
Patent Number:
9910231
An apparatus comprising a cage for pluggable optical modules including a bay having a first port stacked with a second port, the bay having an opening between the first and second port; a heat collector module in the opening comprising a first contact plate adjacent to the first port bottom and provided in the first port and configured to contact a first optical module in the first port, a second contact plate adjacent to the second port top and provided in the second port and configured…
System and method for determining nonlinear mitigation perturbative distortion coefficients using a received optical signal
Granted: February 27, 2018
Patent Number:
9906309
A processor circuit is provided in a coherent optical receiver module. The processor receives a series of electrical signals over a time period, representative of a series of optical signals received at instants of time within the time period. Each of the electrical signals is indicative of a respective one of a plurality of points on an IQ plane, each of the points being spaced from one of a plurality of predetermined points in the IQ plane by a corresponding one of a plurality of…
Multiplexer and modulation arrangements for multi-carrier optical modems
Granted: February 20, 2018
Patent Number:
9900104
Consistent with the present disclosure, data, in digital form, is received by a transmit node of an optical communication system, and converted to an analog signal by a digital-to-analog converter (DAC) to drive a modulator. The modulator, in turn, modulates light at one of a plurality of wavelengths in accordance with the received data forming a plurality of corresponding carriers. The carriers are modulated according to one of a plurality of modulation formats and then optically…
