Wavelength Patents (Class 398/48)
  • Patent number: 11402802
    Abstract: The present invention relates to a coherent detection array and methods of multiplexing for signal readout of the coherent detection array. The coherent detection array may be implemented on a photonic integrated circuit (PIC). It may comprise a plurality of coherent detection units coupling with connecting waveguides and electrical conducting paths, wherein the electrical conducting paths may manifest as readout channels for multiplexing electrical signals. The detection units may be configured to include free-space-to-waveguide couplers, optical couplers, and photodetectors. The coherent detection array enables multiplexing methods that may leverage extra degrees of freedom of the coherent detection array. These methods may include those enabled by the local oscillator and those related to the properties and responses of the components of the PIC-based detection array.
    Type: Grant
    Filed: August 19, 2020
    Date of Patent: August 2, 2022
    Assignee: OAM PHOTONICS LLC
    Inventors: Kam Wai Clifford Chan, Chung Ki Wong
  • Patent number: 11381891
    Abstract: Systems and methods are provided for flexible wavelength assignments in a communication network. An optical adapter is provided for the systems and methods. The optical adapter has a first interface connected to an optical switch via a first optical cable, a second interface connected to a plurality of server ports via a plurality of second optical cables, and a controller coupled to a switch controller of the optical switch. The controller is configured to perform: obtaining instructions from the switch controller; and assigning, based on the instructions, one or more wavelengths for a time slot to one of the server ports, wherein the controller performs the assigning without direct communication with the server ports.
    Type: Grant
    Filed: April 30, 2020
    Date of Patent: July 5, 2022
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Kevin B. Leigh, Sagi Varghese Mathai, Paul Kessler Rosenberg
  • Patent number: 11372791
    Abstract: A computer comprising a plurality of interconnected processing nodes arranged in a configuration with multiple layers, arranged along an axis, comprising first and second endmost layers and at least one intermediate layer between the first and second endmost layers is provided. Each layer comprises a plurality of processing nodes connected in a ring by an intralayer respective set of links between each pair of neighbouring processing nodes, the links adapted to operate simultaneously. Nodes in each layer are connected to respective corresponding nodes in each adjacent layer by an interlayer link. Each processing node in the first endmost layer is connected to a corresponding node in the second endmost layer. Data is transmitted around a plurality of embedded one-dimensional logical rings with an asymmetric bandwidth utilisation, each logical ring using all processing nodes of the computer in such a manner that the plurality of embedded one-dimensional logical rings operate simultaneously.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: June 28, 2022
    Assignee: GRAPHCORE LIMITED
    Inventor: Simon Knowles
  • Patent number: 11362753
    Abstract: An optical node device includes one or more input-side wavelength selection switches, a plurality of output-side wavelength selection switches, and an amplification unit. The input-side wavelength selection switches include a plurality of output ports, separate input light in accordance with a wavelength, and output the separated light from the output port corresponding to an output destination of the separated light. The output-side wavelength selection switches include input ports each receiving the light output from each of the one or more input-side wavelength selection switches, multiplex the light received from the input ports, and output the light. The amplification unit amplifies the light output from each of the output ports of the input-side wavelength selection switches and outputs the amplified light to the output-side wavelength selection switch at the output destination corresponding to the output port.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: June 14, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Hirotaka Ono, Mitsunori Fukutoku, Shingo Kawai, Yutaka Miyamoto
  • Patent number: 11329725
    Abstract: A device system for constituting a 3D image sensor based on optical phased array is provided. The device system includes an optical modulator that is integrated on the same photonic integrated circuit (PIC) chip as a laser diode array with different output wavelengths and a multiplexer for transmitting an optical wave having a wavelength selected from the laser diode array to an optical waveguide and modulates the optical wave into a specific optical signal, an optical phased array that radiates the optical signal received via an optical switch to the free space using a tunable transmit and receive (TRx) antenna array, and a photodetector that converts an Rx optical signal received by a Tx optical signal transmitted via the optical phased array into an electrical signal.
    Type: Grant
    Filed: September 2, 2020
    Date of Patent: May 10, 2022
    Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: HyoHoon Park, Joonsup Shim, Seonghwan Kim, Hyun-Woo Rhee
  • Patent number: 11320302
    Abstract: An arrangement for high rate fiber optical distributed acoustic sensing includes an optical fiber, a light launch module adapted to inject a first coherent light pattern into the optical fiber and to inject a second coherent light pattern into the optical fiber while first Rayleigh backscatter light of the first light pattern is propagating in the optical fiber, wherein the first coherent light pattern and the second coherent light pattern have a light pattern power above a nonlinear effect related power limit; and a detector adapted to detect the first Rayleigh backscatter light and to detect second Rayleigh backscatter light of the second light pattern.
    Type: Grant
    Filed: October 8, 2019
    Date of Patent: May 3, 2022
    Assignee: AiQ Dienstleistungen UG (haftungsbeschränkt)
    Inventor: Gregor Cedilnik
  • Patent number: 11290393
    Abstract: An example system includes a plurality of network nodes, each including one or more respective first transceivers configured to transmit data according to a first maximum throughput, and one or more respective second transceivers configured to transmit data according to a second maximum throughput that is less than the first maximum throughput. A first network node is configured to transmit, using a respective one of the first transceivers, first data including a plurality of optical subcarriers to two or more second network nodes according to the first maximum throughput, each optical subcarrier being associated with a different one of the two more other network nodes. The two or more second network nodes are configured to receive, using respective ones of the second transceivers, the first data from the first network node.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: March 29, 2022
    Assignee: Infinera Corporation
    Inventor: Steven J. Hand
  • Patent number: 11284172
    Abstract: Systems and methods include receiving Open Shortest Path First (OSPF) packets from a plurality of OSPF areas; sending self-generated OSPF packets to the plurality of OSPF areas; and filtering of the received OSPF packets such that received Link State Advertisement (LSA) packets from an OSPF area (are not forwarded to other OSPF areas. In an embodiment, the systems and methods can be used for a scalable OSPF deployment for management of a network, such as an optical network.
    Type: Grant
    Filed: February 16, 2021
    Date of Patent: March 22, 2022
    Assignee: Ciena Corporation
    Inventor: Cheng Peng
  • Patent number: 11212028
    Abstract: A coherent passive optical network extender apparatus includes an extender transceiver for communication with an associated optical headend. The extender transceiver includes at least one receiving portion, at least one transmitting portion, and an extension processor. The apparatus further includes a signal adaptation unit configured to convert a downstream electrical transmission lane into a plurality of individual wavelengths. Each of the converted individual wavelengths are for transmission to one of an optical node and an end user. The apparatus further includes a plurality of transceivers, disposed within the signal adaptation unit, and configured to process and transmit the converted individual wavelengths as a bundle for retransmission to the respective end users.
    Type: Grant
    Filed: December 30, 2019
    Date of Patent: December 28, 2021
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Zhensheng Jia, Curtis Dean Knittle, Luis Alberto Campos
  • Patent number: 11204470
    Abstract: Disclosed is an invention related to a wavelength selective switch for multiple units.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: December 21, 2021
    Assignee: INLC TECHNOLOGY CO., LTD.
    Inventors: Seong Woo Suh, Seong Min Kang, Tae Hwan Kim
  • Patent number: 11172275
    Abstract: Methods and apparatus are provided for switching an optical signal. In one aspect, an optical switching apparatus comprises a first beam splitting apparatus configured to split a first optical input signal into first and second optical signals, wherein the first optical signal has substantially the same polarization state as the second optical signal. The apparatus also comprises a switching matrix comprising a plurality of first outputs of the switching matrix and a plurality of second outputs of the switching matrix, each first output of the switching matrix associated with a respective one of the second outputs of the switching matrix, the switching matrix configured to selectively direct the first optical signal to a selected one of the first outputs of the switching matrix and to selectively direct the second optical signal to the second output of the switching matrix associated with the selected first output of the switching matrix.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: November 9, 2021
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Francesco Testa, Claudio Oton
  • Patent number: 11139893
    Abstract: A set of media channel (MCh) widths is determined for an optical network. Based on a topology of the network, a first set of original MCh widths are computed for tentative use in the optical network, the first set of original MCh widths defining a target spectral efficiency. A reduced set of new MCh widths are generated from the first set of MCh widths by respectively mapping each of the original MCh widths of the first set of original MCh widths to a corresponding, or respective, new MCh width. An optimization algorithm is used in an example embodiment to facilitate the mapping.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: October 5, 2021
    Assignee: XIEON NETWORKS S.a.r.l.
    Inventors: Antonio Eira, João Manuel Ferreira Pedro
  • Patent number: 11079551
    Abstract: An optical device may include a monolithic beam steering engine. The device may include a twin M×N wavelength selective switch (WSS) including a first M×N WSS and a second M×N WSS. The first M×N WSS may include a first panel section of the monolithic beam steering engine to perform first beam steering of first beams, wherein the first beam steering is add/drop port beam steering; and a second panel section of the monolithic beam steering engine to perform second beam steering of second beams, wherein the second beam steering is common port beam steering. The first M×N WSS may include a first optical element aligned to the monolithic beam steering engine to direct one of the first beams or the second beams relative to the other of the first beams or the second beams, such that the first beams are directed in a different direction from the second beams.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: August 3, 2021
    Assignee: Lumentum Operations LLC
    Inventors: Peter David Roorda, Paul Colbourne, Sheldon McLaughlin
  • Patent number: 11044034
    Abstract: To provide a light wavelength separation device and a light wavelength separation method that can be flexibly adapted for various channel intervals of a wavelength-division multiplexed (WDM) signal, a light wavelength separation circuit is provided with: an optical coupler which splits a wavelength-multiplexed optical signal in which optical signals of a plurality of channels are multiplexed; a band-pass filter which is arranged for each of output ports of the optical coupler, separates optical signals included in the wavelength-multiplexed optical signal inputted from the output ports of the optical coupler into channels of which the central frequencies are not adjacent to each other, and outputs the separated optical signals from respectively different output ports; and an optical switch which selects one of paths of the optical signals inputted from the output ports of each band-pass filter.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: June 22, 2021
    Assignee: NEC CORPORATION
    Inventor: Yoshirou Satou
  • Patent number: 11025361
    Abstract: The present disclosure provides system to configure one or more photonics components using a method. The method includes a first step to initialize a photonic abstraction interface driver at a photonic abstraction system. In addition, the method includes another step to call a node detection function at the photonic abstraction system. Further, the method includes yet another step to call a plurality of application programming interfaces (APIs) at the photonic abstraction system. Furthermore, the method includes yet another step to de-initialize the photonic abstraction interface driver at the photonic abstraction system. Moreover, the photonic abstraction interface driver is initialized by a photonic abstraction interface host. Also, the photonic abstraction interface host and the photonic abstraction interface driver are layers of a photonic abstraction interface (PAI). Also, the photonic abstraction interface driver translates the photonic abstraction interface (PAI) into a plurality of shared libraries.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: June 1, 2021
    Assignee: STERLITE TECHNOLOGIES LIMITED
    Inventors: Puneet Kumar Agarwal, Vishnu Krishna
  • Patent number: 11018767
    Abstract: 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 second data streams; applies an adjustable temporal low pass filter to the first aggregate power and the second aggregate power resulting in a compensation power, the adjustable temporal low pass filter adjusted to achieve a performance metric; and phase-rotates the first data streams and the second data streams proportional to the compensation power.
    Type: Grant
    Filed: April 9, 2020
    Date of Patent: May 25, 2021
    Assignee: Infinera Corporation
    Inventors: Pierre Herve Mertz, Adbullah Karar
  • Patent number: 11018792
    Abstract: Methods and apparatus are provided for processing communications. In one aspect, a method of configuring a first Flex Ethernet (FlexE) node comprises receiving first data from a second FlexE node in time slots over at least one physical layer connection, the first data including overhead identifying assignments of the time slots to one or more client flows in the first data, and assigning time slots for transmission of second data to the second FlexE node based on the assignments of time slots in which the first data is received.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: May 25, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Jun Deng
  • Patent number: 10958992
    Abstract: Systems and methods for a scalable Open Shortest Path First (OSPF) deployment for optical networks include steps of causing communication to a router connected to a data communication network, for North-South communication; causing communication to a management plane associated with the optical network via one or more interfaces that are each connected to one or more Open Shortest Path First (OSPF) domains, for East-West communication; and implementing an OSPF terminator between the one or more OSPF domains that includes receiving OSPF packets, sending self-generated OSPF packets, and preventing flooding of received OSPF packets between the one or more OSPF domains.
    Type: Grant
    Filed: June 12, 2020
    Date of Patent: March 23, 2021
    Assignee: Ciena Corporation
    Inventor: Cheng Peng
  • Patent number: 10893002
    Abstract: Various embodiments are described herein for a radio frequency (RF) signal router. In one example embodiment, the RF router comprises a controller, an input stage, an intermediate stage and an output stage. The input stage includes RF input terminals, pre-processing circuit and input processors, where each RF input terminal receives an incoming RF signal, each pre-processing circuit processes the incoming RF signal based on its power level, and each input processor adjusts a power level of an input RF signal based on a first controller signal to generate a processed input RF signal. The intermediate stage comprises intermediate switch matrices coupled to a controller and input processors, and configured to route intermediate RF signals.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: January 12, 2021
    Assignee: Evertz Microsystems Ltd.
    Inventors: Eric Fankhauser, Constantin Lacatus
  • Patent number: 10855372
    Abstract: Coupled resonators having two resonances are described. A first resonance occurs at the frequency of a pump signal. A second resonance occurs at the frequency of a first Stokes signal. The stop band of the coupled resonators suppresses the second Stokes signal and thus all other higher order Stokes signals. The coupled resonators can be used to more efficiently generate a first Stokes signal having a narrow line width signal.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: December 1, 2020
    Assignee: Honeywell International Inc.
    Inventors: Matthew Wade Puckett, Jianfeng Wu, Neil A. Krueger, Karl D. Nelson
  • Patent number: 10805905
    Abstract: Information on allocation of a bandwidth of uplink communication of each of user devices is extracted from information notified from an upper-level device on the uplink communication of the user devices. Correspondence information is created to indicate a correspondence among the upper-level device, the terminal device, the lower-level device, and the user device. A start time point of the uplink communication of the terminal device and an information amount of signals for which transmission of the uplink communication of the terminal device is allowed are allocated to the terminal device on the basis of the information on allocation of the bandwidth of the uplink communication of each of the user devices and the correspondence information.
    Type: Grant
    Filed: March 28, 2016
    Date of Patent: October 13, 2020
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Hiroshi Ou, Tatsuya Shimada, Takayuki Kobayashi, Jun Terada
  • Patent number: 10797819
    Abstract: A load-controlling device controlling load on an optical transmission line, the input of which is coupled to an emitting device for modulating with data and multiplexing a plurality of useful wavelengths into a useful optical signal to be transmitted over the transmission line. The load-controlling device includes elements for generating a filler optical signal composed of at least one filler wavelength that is not modulated by data, to be injected into the optical transmission line. The generating elements generate a source optical signal composed of a plurality of wavelengths corresponding to the plurality of wavelengths of the useful optical signal and selects the wavelength of the filler optical signal among the wavelengths of the source optical signal. A control module controls selection of the wavelength of the filler optical signal depending on information indicative of non-turn-on of a wavelength among the plurality of wavelengths of the useful optical signal.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: October 6, 2020
    Assignee: ORANGE
    Inventors: Erwan Pincemin, Yann Loussouarn
  • Patent number: 10727971
    Abstract: In some embodiments, an apparatus includes a reconfigurable optical add-drop multiplexer (ROADM). The ROADM has a wavelength selective switch (WSS) that does not perform power equalization when the WSS is operative. The ROADM also has a first pre-amplifier, a first channel power equalizer operatively coupled to the first pre-amplifier, a second pre-amplifier operatively coupled to the first channel power equalizer and the WSS, a first post-amplifier operatively coupled to the WSS, a second channel power equalizer operatively coupled to the first post-amplifier, and a second post-amplifier operative coupled to the second channel power equalizer.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: July 28, 2020
    Assignee: Juniper Networks, Inc.
    Inventor: Essam Tony Keddis
  • Patent number: 10686546
    Abstract: A network controller controls optical nodes configured to communicate with each other at multiple line rates using different tuples of [bits/symbol, symbol rate] for each line rate. The network controller determines multiple paths between two optical nodes, selects a desired line rate at which to communicate between the two optical nodes, and accesses a path database that indicates an available optical bandwidth and an available optical signal-to-noise ratio (SNR) along each path. The network controller determines feasible paths among the paths. To do this, the network controller, for each path, searches the different tuples of the desired line rate for a tuple for which a desired optical bandwidth and a desired optical SNR are accommodated by the available optical bandwidth and the available optical SNR of the path, respectively. The network controller programs optical nodes of one of the feasible paths with a tuple found in the searching.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: June 16, 2020
    Assignee: Cisco Technology, Inc.
    Inventors: Alberto Arnaldo Tanzi, Stefano Piciaccia, Maurizio Gazzola, Lorenzo Ghioni
  • Patent number: 10644823
    Abstract: An optical transfer method of an optical transfer system including a transmitter, a first wavelength converter configured to use first excitation light to perform wavelength-conversion of first signal light which is the transmission light into second signal light in a different wavelength band, a second wavelength converter configured to use second excitation light to perform wavelength-conversion of the second signal light into third signal light in a different wavelength band, and a receiver configured to receive the third signal light, the method includes acquiring a wavelength of the transmission light, a wavelength of the first excitation light, and a wavelength of the second excitation light; and deciding local emission light of the receiver based on a wavelength of reception light of the receiver obtained from the wavelength of the transmission light, the wavelength of the first excitation light, and the wavelength of the second excitation light.
    Type: Grant
    Filed: June 10, 2019
    Date of Patent: May 5, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Masahiro Yuki, Tomoaki Takeyama, Kazuo Takatsu
  • Patent number: 10645473
    Abstract: An all-optical network comprises: a first network; a second network; and a PWXC coupling the first network to the second network and comprising passive optical components. A method comprises: receiving a first optical signal from a first tail node of a first network; directing the first optical signal from a first input port of a PWXC to a first output port of the PWXC using first passive optical components; and transmitting the first optical signal to a third head node of a third network. An all-optical network comprising: a light bank; a first network coupled to the light bank; a second network coupled to the light bank; and a first PWXC coupling the first network and the second network.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: May 5, 2020
    Assignee: Futurewei Technologies, Inc.
    Inventors: Qianfan Xu, Feng Zhang, Xiao Andy Shen
  • Patent number: 10637584
    Abstract: A photonic integrated circuit for an optical transceiver includes an optical Rx circuit, an optical Tx circuit, and an integrated optical loopback circuit configured to switchably direct a loopback optical signal from an output of the optical Tx circuit to an input of the optical Rx circuit. The integrated optical loopback circuit enables in-field testing of the optical transceiver. The integrated optical loopback circuit may include an optical mixer for mixing polarization channels in dual-polarization embodiments of the optical transceiver. A phase tuner may be provided for tuning the optical phase of local oscillator light for mixing I and Q channels of the loopback optical signals in embodiments operating with quadrature modulated signals.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: April 28, 2020
    Assignee: Elenion Technologies, LLC
    Inventors: Robert Palmer, Torsten Wuth-Brüning, Ruizhi Shi
  • Patent number: 10594401
    Abstract: The present disclosure relates to an optical repeater system for 5th generation (5G) mobile communication. The optical repeater system does not require an additional optical wavelength for a plurality of remote units and can increase the transmission capacity by adding a remote unit without incurring an unnecessary cost, thereby facilitating high-speed and large-capacity data transmission. In addition, the optical repeater system can transmit/receive both a high-speed and large-capacity service signal, as an analog optical signal, and a management control signal, as a digital optical signal, between a master unit and a plurality of remote units. Also, the optical repeater system can selectively and differently compensate for propagation delay times of multiple paths between a terminal and a base station in a mobile communication system, especially, in the 5G mobile communication system.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: March 17, 2020
    Assignee: FRTEK CO., LTD.
    Inventors: Byoung-Chul Lim, Young-Jun Won, Youn-Son Hong, Ki-Chul Lee, Jun-Hyun Lee
  • Patent number: 10567856
    Abstract: An optical device includes a plurality of optical input ports, a plurality of optical output ports, a wavelength dispersion arrangement and at least one optical beam steering arrangement. The plurality of optical input ports is configured to receive optical beams each having a plurality of wavelength components. The wavelength dispersion arrangement receives the optical beams and spatially separates each of the optical beams into a plurality of wavelengths components. The optical beam steering arrangement has a first region onto which the spatially separated wavelength components are directed and a second region onto which any subset of the plurality of wavelength components of each of the optical beams is selectively directed after the wavelength components in each of the subsets are spatially recombined with one another. The optical beam steering arrangement selectively directs each of subset of the plurality of wavelength components to a different one of the optical output ports.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: February 18, 2020
    Assignee: Molex, LLC
    Inventor: Jefferson L. Wagener
  • Patent number: 10554302
    Abstract: An optical communication apparatus receives a signal in which optical signals each including multiplexed subcarriers are frequency multiplexed, and includes: transceivers to perform reception process on a processing target band in which any one of the optical signals is included and to calculate a frequency offset amount between local light and a reception target optical signal that is included in the processing target band and calculate a carrier frequency interval between the local light and an optical signal adjacent to the reception target optical signal; and a frequency control unit to calculate an adjustment amount when an optical communication apparatus that is a source of the optical signals adjusts the frequencies of the optical signals based on the frequency offset amount and the carrier frequency interval calculated by the transceivers and to transmit the calculated adjustment amount to the optical communication apparatus that is a source of the optical signals.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: February 4, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Masashi Binkai, Keisuke Matsuda
  • Patent number: 10536237
    Abstract: An optical transceiver includes: a wavelength-tunable transmitter transmitting an optical transmission signal; a wavelength-tunable receiver receiving an optical reception signal; a wavelength table storing a plurality of wavelengths; an input terminal inputs a wavelength selection signal; and a control unit that identifies one of the optical transmission signal and the optical reception signal as a target based on the wavelength selection signal, selects the wavelength from the wavelength table based on the wavelength selection signal, performs transmission wavelength control in which the selected wavelength is set in the wavelength-tunable transmitter as a wavelength of the optical transmission signal in the case that the optical transmission signal is identified as the target, and performs reception wavelength control in which the selected wavelength is set in the wavelength-tunable receiver as a wavelength of the optical reception signal in the case that the optical reception signal is identified as the t
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: January 14, 2020
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Katsuhisa Taguchi, Kota Asaka
  • Patent number: 10530518
    Abstract: A network architecture for an optical communication network, an optical communication network configured according to the network architecture and a method for interconnecting via a MD-WSS are provided. The network comprises at least a first ODN, an MD-WSS having a plurality of ports, and at least a first node. The first ODN is connected to one of the ports of the MD-WSS and the first node is connected to another one of the ports of the MD-WSS, wherein the ports of the MD-WSS 100 are paired such that the port connected to the first ODN is paired with the port connected to the first node such that signals originating from the first ODN are in a default case routed to the first node, and signals originating from the first node are in the default case routed to the first ODN.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: January 7, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Björn Skubic, Ahmad Rostami
  • Patent number: 10523356
    Abstract: A coherent passive optical network extender apparatus includes an extender transceiver for communication with an associated optical headend. The extender transceiver includes at least one receiving portion, at least one transmitting portion, and an extension processor. The apparatus further includes a signal adaptation unit configured to convert a downstream electrical transmission lane into a plurality of individual wavelengths. Each of the converted individual wavelengths are for transmission to one of an optical node and an end user. The apparatus further includes a plurality of transceivers, disposed within the signal adaptation unit, and configured to process and transmit the converted individual wavelengths as a bundle for retransmission to the respective end users.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: December 31, 2019
    Assignee: Cable Television Laborties, Inc.
    Inventors: Zhensheng Jia, Curtis Dean Knittle, Luis Alberto Campos
  • Patent number: 10498450
    Abstract: A data center network, comprises a first group of optical ports for connection to respective servers of a first group of servers; a second group of optical ports for connection to respective servers of a second group of servers; a first lower passive optical routing element arranged to route optical communication signals between the first group of optical ports and a first lower optical communication path; a second lower passive optical routing element arranged to route optical communication signals between the second group of optical ports and a second lower optical communication path; an upper passive optical routing element arranged to: (i) route optical communication signals between the first lower optical communication path and an upper optical communication path, and (ii) route optical communication signals between the second lower optical communication path and the upper optical communication path.
    Type: Grant
    Filed: November 26, 2015
    Date of Patent: December 3, 2019
    Assignee: UNIVERSITY OF LEEDS
    Inventors: Jaafar Elmirghani, Taisir El-Gorashi, Ali Hammadi
  • Patent number: 10484125
    Abstract: A communication system includes first and second devices. The first device includes a first transmitter and a first receiver. The first transmitter transmits one data of a first type using one or more first channels over a first communication link to the second device. The first receiver receives one data of a second type, from the second device, using one or more second channels over the first communication link. The second device includes a second transmitter and a second receiver. The second receiver receives the one data of the first type using the one or more first channels over the first communication link, and to generate the one data of the second type based on the one data of the first type. The second transmitter transmits the one data of the second type using one or more second channels over the first communication link to the first device.
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: November 19, 2019
    Assignee: International Business Machines Corporation
    Inventors: Alan F. Benner, Douglas M. Freimuth, Benjamin G. Lee, Fabrizio Petrini, Laurent Schares, Clint L. Schow, Mehmet Soyuer
  • Patent number: 10476791
    Abstract: Embodiments of the present invention provide a communications method and a communications device, so that multiple service signals can be borne in a same bearing area of a same Ethernet PCS lane. Therefore, it is implemented that multiple types of service signals share an Ethernet channel, so that the multiple types of service signals can share a link resource and an interface module resource. This provides a basis for convergence and integration of devices in a multi-technology system, and can improve utilization of link resources and reduce a quantity, a footprint, power consumption, maintenance costs, and the like of devices in a metropolitan area network.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: November 12, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Qiwen Zhong
  • Patent number: 10462697
    Abstract: The present invention provides a method of receiving a timing advance command by a user equipment in a wireless communication system. A terminal receives information on a time advance group from a base station, and also receives the tuning advance command corresponding to the time advance group from the base station.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: October 29, 2019
    Assignee: LG Electronics Inc.
    Inventors: Sung Jun Park, Sung Duck Chun, Sung Hoon Jung, Seung June Yi, Young Dae Lee
  • Patent number: 10454608
    Abstract: An apparatus includes a memory and a processor operatively coupled to the memory. The processor is configured to partition a set of ports of an optical multiplexer into a set of port groups including a first port group having a first set of ports and a second port group having a second set of ports mutually exclusive from the first set of ports. The processor is configured to associate the first port group with a first router and associate the second port group with a second router. When the optical multiplexer is operatively coupled to the first router and the second router, the first router is operatively coupled to the optical multiplexer via the first set of ports and not the second set of ports, and the second router is operatively coupled to the optical multiplexer via the second set of ports and not the first set of ports.
    Type: Grant
    Filed: January 4, 2019
    Date of Patent: October 22, 2019
    Assignee: Juniper Networks, Inc.
    Inventors: Puneet Jain, Amit Shukla
  • Patent number: 10454583
    Abstract: A method for assigning a network path after receiving a connection request to connect a first node with a second node of a network. The method including evaluating a network utilization parameter of the network, such as a network load or blocking probability, at that point in time. If the network utilization parameter is below a minimum threshold level, the method includes carrying out the steps of identifying a set of n network paths through the network that connect the first node with the second node and are absent non-linear links, performing network path selection by selecting p network paths from the set of n network paths that have the best linear OSNR, and, selecting a network path from the set of p network paths that balances the wavelength utilization between the first node and the second node of a network.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: October 22, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD
    Inventors: Hamid Mehrvar, Mohammad Mehdi Mansouri Rad
  • Patent number: 10419263
    Abstract: A transmission system includes a first transponder including a first I/Q modulator, and a second transponder including a second I/Q modulator, and configured to communicate with the first transponder using a frequency modulation scheme, wherein the first transponder is configured to set a first phase rotation mode in a first state for first light signal output from the first I/Q modulator, and transmit, to the second transponder, a first command to specify a second phase rotation mode for second light signal output from the second I/Q modulator, and the second transponder is configured to set, in response to the first command, the second phase rotation mode in a state specified by the first command.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: September 17, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Yi Ge, Takeshi Hoshida, Hisao Nakashima, Yuichi Akiyama
  • Patent number: 10374745
    Abstract: A network controller controls optical nodes configured to communicate with each other at multiple line rates using different tuples of [bits/symbol, symbol rate] for each line rate. The network controller determines multiple paths between two optical nodes, selects a desired line rate at which to communicate between the two optical nodes, and accesses a path database that indicates an available optical bandwidth and an available optical signal-to-noise ratio (SNR) along each path. The network controller determines feasible paths among the paths. To do this, the network controller, for each path, searches the different tuples of the desired line rate for a tuple for which a desired optical bandwidth and a desired optical SNR are accommodated by the available optical bandwidth and the available optical SNR of the path, respectively. The network controller programs optical nodes of one of the feasible paths with a tuple found in the searching.
    Type: Grant
    Filed: June 8, 2018
    Date of Patent: August 6, 2019
    Assignee: Cisco Technology, Inc.
    Inventors: Alberto Arnaldo Tanzi, Stefano Piciaccia, Maurizio Gazzola, Lorenzo Ghioni
  • Patent number: 10348439
    Abstract: A control system for spectral slot assignment in flexible grid optical networks determines, for a given optical path, a physical source node, a physical destination node, and physical intermediate nodes, determines the number of contiguous spectral slots to allocate for traffic on the path, identifies candidate combinations of spectral slots available for the traffic, and creates an auxiliary graph for the path. The auxiliary graph includes auxiliary links representing candidate combinations of spectral slots, virtual nodes representing pairs of neighboring physical nodes, and auxiliary links between each pair of virtual source-side and destination-side intermediate nodes representing either pass-through traffic or wavelength shifted traffic.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: July 9, 2019
    Assignee: Fujitsu Limited
    Inventors: Inwoong Kim, Xi Wang, Paparao Palacharla, Tadashi Ikeuchi
  • Patent number: 10313048
    Abstract: A method for establishing bidirectional communication links includes: supplying, to at least two optical transceiver modules at each side of at least two optical paths, a multiplexed optical CW signal comprising at least two optical CW signals having the same differing wavelengths, and modulating the multiplexed optical CW signal according to modulation signals; creating, at each side of the optical paths, at least two first and second optical transmit signals by optically filtering the modulated optical signals so that only a single wavelength remains, and routing pairs of a first and second optical transmit signal to the optical paths, wherein the optical transmit signals of each pair have differing wavelengths and wherein the optical transmit signals transmitted in the same direction over the same optical paths have differing wavelengths; receiving each optical transmit signals at a dedicated optical transceiver module by mixing it with the multiplexed optical CW signal.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: June 4, 2019
    Assignee: ADVA Optical Networking SE
    Inventors: Cornelius Fürst, Thomas Richter, Sorin Tibuleac
  • Patent number: 10256936
    Abstract: Example embodiments of the present invention relate to a software programmable reconfigurable optical add drop multiplexer (ROADM) comprising of a plurality of wavelength switches and a plurality of waveguide switches, wherein when the plurality of waveguide switches are set to a first switch configuration, the software programmable ROADM provides n degrees of an n-degree optical node, and wherein when the waveguide switches are set to a second switch configuration, the software programmable ROADM provides k degrees of an m-degree optical node.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: April 9, 2019
    Inventors: Mark E. Boduch, Kimon Papakos
  • Patent number: 10148385
    Abstract: The present application provides an optical port auto-negotiation method, including: a: selecting a downstream to-be-received wavelength; b: listening to a downstream message on the selected downstream to-be-received wavelength, performing c if a wavelength idle message is received, and returning to a if no wavelength idle message is received within a specified or fixed time, where the wavelength idle message is used to identify that the wavelength is not occupied or not allocated; c: sending a wavelength application message on an upstream wavelength, performing d if a wavelength grant message is received in a downstream direction; otherwise, going back to a or b, where the wavelength application message is used to identify a request for allocation of the wavelength, and the wavelength grant message is used to identify acknowledgment of wavelength allocation; and d: setting an optical port auto-negotiation success flag bit. The present application further provides an optical module.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: December 4, 2018
    Assignee: Huawei Technologies Co., Ltd
    Inventor: Sulin Yang
  • Patent number: 10129615
    Abstract: An optical device includes a plurality of optical input ports, a plurality of optical output ports, a wavelength dispersion arrangement and at least one optical beam steering arrangement. The plurality of optical input ports is configured to receive optical beams each having a plurality of wavelength components. The wavelength dispersion arrangement receives the optical beams and spatially separates each of the optical beams into a plurality of wavelengths components. The optical beam steering arrangement has a first region onto which the spatially separated wavelength components are directed and a second region onto which any subset of the plurality of wavelength components of each of the optical beams is selectively directed after the wavelength components in each of the subsets are spatially recombined with one another. The optical beam steering arrangement selectively directs each of subset of the plurality of wavelength components to a different one of the optical output ports.
    Type: Grant
    Filed: May 8, 2017
    Date of Patent: November 13, 2018
    Assignee: Nistica, Inc.
    Inventor: Jefferson L. Wagener
  • Patent number: 10104456
    Abstract: An optical device includes a plurality of optical input ports, a plurality of optical output ports, a wavelength dispersion arrangement and at least one optical beam steering arrangement. The plurality of optical input ports is configured to receive optical beams each having a plurality of wavelength components. The wavelength dispersion arrangement receives the optical beams and spatially separates each of the optical beams into a plurality of wavelengths components. The optical beam steering arrangement has a first region onto which the spatially separated wavelength components are directed and a second region onto which any subset of the plurality of wavelength components of each of the optical beams is selectively directed after the wavelength components in each of the subsets are spatially recombined with one another. The optical beam steering arrangement selectively directs each of subset of the plurality of wavelength components to a different one of the optical output ports.
    Type: Grant
    Filed: May 8, 2017
    Date of Patent: October 16, 2018
    Assignee: Nistica, Inc.
    Inventor: Jefferson L. Wagener
  • Patent number: 10044441
    Abstract: Energy reduction in a CATV network device, such as an optical node, in a CATV network may be accomplished using a system and method for controlling an amplifier in response to channel loading. The system and method detects a channel loading condition for a CATV RF signal including a plurality of utilized channels across a channel spectrum defining a plurality of potential channels. The channel loading condition may be detected by scanning the CATV RF signal to measure the channel loading or by obtaining channel loading data from a remote PHY device (RPD) located in the optical node. The system and method then obtains an amplifier operating parameter associated with the channel loading condition and applies the amplifier operating parameter to control power consumption of an amplifier in the optical node (e.g., by changing bias current) in response to the channel loading condition.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: August 7, 2018
    Assignee: Applied Optoelectronics, Inc.
    Inventors: Michael Jones, Rafael Celedon
  • Patent number: 9946045
    Abstract: A module includes a plurality of splitters, a plurality of inputs, and a plurality of outputs wherein the outputs are connected to multi-fiber connectors and wherein outputs from a plurality of splitters are connected to one of the multi-fiber connectors. The splitters have outputs in multiples of eight, such as a 1×32 splitter. The multi-fiber connectors include twelve fiber cables.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: April 17, 2018
    Assignees: CommScope Technologies LLC, CommScope Connectivity Belgium BVBA
    Inventors: Craig Bryan Kegerise, Sean Patrick Kelly, Didier Pierre W. Claeys
  • Patent number: 9876865
    Abstract: Systems and methods for efficient prioritized restoration of services implemented in a node in a network utilizing a control plane include, responsive to detecting a fault on a link adjacent to the node, releasing higher priority services affected by the fault immediately via control plane signaling such that the higher priority services mesh restore; maintaining a list of the released higher priority services; tracking mesh restoration of the released higher priority services; and releasing lower priority services based on the tracking, subsequent to the immediate mesh restoration of the higher priority services.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: January 23, 2018
    Assignee: Ciena Corporation
    Inventors: Darek Skalecki, Gerard L. Swinkels