Wavelength Division Or Frequency Division (e.g., Raman, Brillouin, Etc.) Patents (Class 398/79)
  • Patent number: 11967986
    Abstract: Systems and methods include causing perturbations across optical spectrum; probing responses across some or all of the optical spectrum after the perturbations; and determining a nonlinear transfer function based on the responses. The nonlinear transfer function can include a representation of any of end-to-end channel powers, Signal-to-Noise Ratio (SNR), Noise-to-Signal Ratio (NSR), Bit Error Rate (BER), Q, and Mean Squared Error (MSE).
    Type: Grant
    Filed: October 25, 2022
    Date of Patent: April 23, 2024
    Assignee: Ciena Corporation
    Inventors: Alex W. MacKay, Priyanth Mehta, Andrew Kam, David W. Boertjes
  • Patent number: 11966085
    Abstract: An optical transceiver includes an input assembly, an output port, a fiber patch panel, multiple first optical fibers and multiple second optical fibers. The input assembly is arranged on a circuit board and has a first input port and a second input port. The fiber patch panel is arranged between the input assembly and the output port, and has multiple first fiber patch slots and multiple second fiber patch slots. The first optical fibers are connected to the first input port and the output port. The first optical fiber passes through the first fiber patch slot and the second fiber patch slot. The second optical fibers are connected to the second input port and the output port. The second optical fiber passes through the first fiber patch slot and the second fiber patch slot. The second fiber patch slot accommodates the first optical fiber and the second optical fiber.
    Type: Grant
    Filed: May 19, 2021
    Date of Patent: April 23, 2024
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Chen-Mao Lu, Wei-Chan Hsu, Chun-Yen Chen
  • Patent number: 11965966
    Abstract: A method for steering a beam is disclosed. According to the method, a scene is scanned with a surface emitting grating optically coupled to a free propagation region. The free propagation region is optically coupled to waveguides. The waveguides are disposed at different angles to the surface emitting grating. The scanning includes scanning in a first dimension by cycling through a cross connect to illuminate each waveguide of the waveguides. Scanning in a second dimension is performed by tuning a wavelength of light used to illuminate the waveguides.
    Type: Grant
    Filed: September 16, 2022
    Date of Patent: April 23, 2024
    Assignee: Acacia Technology, Inc.
    Inventor: Christopher Doerr
  • Patent number: 11956098
    Abstract: A communication device includes: a MAC unit that processes a main signal including a payload, and determines a communication timing of the main signal; a communication unit that performs, based on the communication timing, at least one of transmission processing for E/O converting the main signal acquired from the MAC unit, and transmitting the main signal to a communication counterpart device, and reception processing for O/E converting the main signal received from the communication counterpart device; a main signal transmission line through which the main signal is transmitted between the MAC unit and the communication unit; and a control information transmission line that is provided separately from the main signal transmission line, and through which communication timing data that is data indicating the communication timing is transmitted from the MAC unit to the communication unit.
    Type: Grant
    Filed: June 8, 2020
    Date of Patent: April 9, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Noriko Iiyama, Masamichi Fujiwara, Hiroo Suzuki, Junichi Kani
  • Patent number: 11949498
    Abstract: An optical modulator comprises, as optical modulator components, first and second transmitter chains and a first optical time division multiplex, OTDM, generator arranged to receive time interleaved optical pulses generated by one of said optical modulator components.
    Type: Grant
    Filed: November 2, 2021
    Date of Patent: April 2, 2024
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Thomas Duthel, Helmut Preisach
  • Patent number: 11949462
    Abstract: A communication system may an optical signal generator and a signal path. The generator may generate one or more optical local oscillator (LO) signals and an optical frequency comb. Optical paths and an optical demultiplexer may distribute the optical LO signal(s) and the frequency comb to photodiodes in one or more access points. The photodiodes may be coupled to antenna radiating elements. The optical paths may illuminate each photodiode using a signal pair that includes one of the optical LO signals and one of the carriers from the frequency comb. The photodiodes may convey wireless signals using the antenna radiating elements at frequencies given by the differences in frequency between the signals in the signal pairs. The radiating elements may concurrently convey the wireless signals with different external devices at different frequencies, with different devices at the same frequency, and/or with the same device at the same frequency.
    Type: Grant
    Filed: August 22, 2022
    Date of Patent: April 2, 2024
    Assignee: Apple Inc.
    Inventors: Bertram R Gunzelmann, Zdravko Boos
  • Patent number: 11942997
    Abstract: Consistent with the present disclosure, a local oscillator is provided in a receiver. The local oscillator laser a first and second mirrors and phase section and heaters are provided adjacent each portion of the laser, such that the temperature and thus the frequency of light output from the local oscillator laser may be tuned. Applying electrical power, such as a current or voltage to the phase section may result in rapid frequency tuning of light output from the local oscillator laser but over a limited frequency range. Temperature changes to the mirror sections, however, may afford frequency tuning over a wider range, but frequency tuning the mirror sections requires more time than that required to tune the phase section. Consistent with the present disclosure, a tuning method and apparatus is provided that optimizes laser tuning by selectively tuning the phase and mirror sections.
    Type: Grant
    Filed: July 22, 2021
    Date of Patent: March 26, 2024
    Assignee: Infinera Corporation
    Inventors: Paul N. Freeman, Paul Gavrilovic, Steven Joseph Hand
  • Patent number: 11930463
    Abstract: The present disclosure discloses a time service and positioning network system for an underground chain-shaped large space in a coal mine. The system adopts a base station-level network internal time synchronization method which takes an optical fiber time service as a main part and takes a satellite time service as an auxiliary part to construct a time service and positioning network system with an unified time within the ad-hoc network base stations, based on the ad-hoc network base stations linearly arranged in the underground chain-shaped large space in the coal mine. Through the network construction, the network stabilization and the network application, the system unifies the time reference of the base station-level network and improves the positioning accuracy of the network application by utilization of the base station-level network internal time synchronization method.
    Type: Grant
    Filed: September 30, 2022
    Date of Patent: March 12, 2024
    Assignees: CHINA UNIVERSITY OF MINING AND TECHNOLOGY, XUZHIU KERUI MINING TECHNOLOGY CO., LTD.
    Inventors: Gongbo Zhou, Chuansheng Zhang, Fan Jiang, Lianfeng Han, Shudong Wang, Xin Liu, Duifang Gu, Tao Wang, Chuansong Wang, Libing Wang, Niansheng Liu, Fuxing Shi, Dongrun Liu, Lizheng Li, Zhencai Zhu
  • Patent number: 11927804
    Abstract: A wavelength division multiplexing device includes an alignment substrate configured to provide alignment between optical components of the device. The device includes a plurality of collimating lenses, and the alignment substrate includes a plurality of aligners. Each of the aligners is configured to place a respective one of collimating lenses in a predetermined position and a predetermined orientation with respect to the other collimating lenses. The alignment substrate thereby provides passive alignment of the collimating lenses with a designed optical path. The substrate may also include visual alignment markings that provide an indication of the placement of multi-layer thin film filters so that the filters define an actual optical path in alignment with the designed optical path, and integrated optical waveguides that provide an optical beam to each of the collimating lenses.
    Type: Grant
    Filed: March 4, 2022
    Date of Patent: March 12, 2024
    Assignee: CORNING RESEARCH & DEVELOPMENT CORPORATION
    Inventor: Eric Stephan ten Have
  • Patent number: 11929826
    Abstract: Consistent with the present disclosure, a photonic integrated circuit (PIC) is provided that has 2 N channels (N being an integer). The PIC is optically coupled to N optical fibers, such that each of N polarization multiplexed optical signals are transmitted over a respective one of the N optical fibers. In another example, each of the N optical fibers supply a respective one of N polarization multiplexed optical signals to the PIC for coherent detection and processing. A multiplexer and demultiplexer may be omitted from the PIC, such that the optical signals are not combined on the PIC. As a result, the transmitted and received optical signals incur less loss and amplified spontaneous emission (ASE) noise. In addition, optical taps may be more readily employed on the PIC to measure outputs of the lasers, such as widely tunable lasers (WTLs), without crossing waveguides.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: March 12, 2024
    Assignee: Infinera Corporation
    Inventors: Jeffrey T. Rahn, Fred A. Kish, Jr., Michael Reffle, Peter W. Evans, Vikrant Lal
  • Patent number: 11914200
    Abstract: Optical interconnect topologies may be provided using microLEDs. The topologies may interconnect ICs. The optical interconnect topologies may be used in some instances in place of electrical busses.
    Type: Grant
    Filed: January 8, 2021
    Date of Patent: February 27, 2024
    Assignee: AvicenaTech Corp.
    Inventors: Bardia Pezeshki, Robert Kalman, Alex Tselikov
  • Patent number: 11909515
    Abstract: An optical transmission system includes a transmitting node that transmits wavelength light of an operational path to an optical waveguide, and a receiving node that receives the wavelength light from the optical waveguide. The transmitting node includes a light source that generates spontaneously emitted light and a wavelength selector that generates and outputs dummy wavelength light from the spontaneously emitted light generated by the light source. The receiving node includes an extractor that extracts spectral data of the dummy wavelength light passed in the optical waveguide. The optical transmission system further includes an obtainer that obtains a band state of the operational path from the spectral data of the dummy wavelength light extracted by the extractor.
    Type: Grant
    Filed: July 18, 2022
    Date of Patent: February 20, 2024
    Assignee: FUJITSU LIMITED
    Inventors: Tomoaki Watanabe, Atsushi Kiyama, Makoto Hasegawa, Yoshito Kachita
  • Patent number: 11881897
    Abstract: A photo-electron fusion switch that can perform optical communications without any trouble, even when nodes of a communication source and a communication partner that are large in transmission capacity are connected, and makes it possible to realize a concentrated arrangement of devices having similar functions and reduce the communication processing time is connected to communication source's information processing devices and communication partner's information processing devices and information processing devices that are each different in transmission speed so as to configure an optical network system.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: January 23, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Hideki Nishizawa, Seiki Kuwabara, Seiji Okamoto, Shuto Yamamoto, Tetsuro Inui, Shunichi Soma, Kenya Suzuki, Osamu Moriwaki, Keita Yamaguchi
  • Patent number: 11881893
    Abstract: An optical communication system according to the present invention cancels waveform distortion due to wavelength dispersion by extracting the spectrum of a transmitted optical signal and passing the optical signal to a fiber having a dispersion value opposite to a dispersion amount corresponding to a transmission distance received by the spectrum component and compensates for a transmission path loss due to the fiber having the opposite dispersion value using optical splitters having different split ratios. With this configuration, the present invention can compensate for waveform distortion due to wavelength dispersion by a simple method in an access network and achieve an increase in the reachable transmission distance of the farthest user or an increase in the number of connectable users.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: January 23, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kazutaka Hara, Yasutaka Kimura, Atsuko Kawakita
  • Patent number: 11881898
    Abstract: 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 processor, the outputs being indicative of outputs from the plurality of filters; a laser that supplies light; and a modulator that receives the light and outputs from the DACs, and supplies a plurality of optical subcarriers based on the outputs, such that one of the optical subcarriers has a frequency bandwidth that is wider than remaining ones of the optical subcarriers, said one of the optical subcarriers carrying information for clock recovery.
    Type: Grant
    Filed: December 30, 2022
    Date of Patent: January 23, 2024
    Assignee: Infinera Corporation
    Inventors: Jeffrey T. Rahn, Kuang-Tsan Wu, Steven Joseph Hand, Han Henry Sun
  • Patent number: 11880070
    Abstract: Plural grating couplers having grating conditions different from each other and plural optical waveguides respectively connected with the plural grating couplers are included. The plural grating couplers have the same arraying directions of gratings. Further, each of the plural grating couplers has a different grating interval as a grating condition. Further, plural reflection units respectively provided to the plural optical waveguides are included.
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: January 23, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Toru Miura, Yoshiho Maeda, Hiroshi Fukuda
  • Patent number: 11876559
    Abstract: An optical transmission system includes a first optical node, a second optical node, and an optical fiber provided between the first optical node and the second optical node. The optical transmission system further includes: a signal generator provided in the first optical node and configured to generate an optical signal including a plurality of wavelength channels and an empty channel; an optical transmission circuit provided in the first optical node and configured to output the optical signal to the optical fiber; an optical channel monitor provided in the second optical node and configured to measure reception power of each channel in the optical signal received through the optical fiber; and a processor configured to determine a type of the optical fiber based on the reception power of the empty channel, the reception power being measured by the optical channel monitor.
    Type: Grant
    Filed: July 29, 2022
    Date of Patent: January 16, 2024
    Assignee: FUJITSU LIMITED
    Inventors: Goji Nakagawa, Takafumi Terahara, Hiroki Oi
  • Patent number: 11870490
    Abstract: This application provides an optical link fault identification method, and relate to the field of communications technologies. The method includes: obtaining performance data of a network device, extracting a feature parameter of the performance data, and identifying a fault mode on an optical link based on the feature parameter. The method resolves problems of a difficulty in fault identification and slow troubleshooting that are caused by a large quantity of devices, many line faults, and a difficulty in obtaining manual troubleshooting cases. In addition, a fault can be quickly identified when the fault occurs, improving troubleshooting efficiency. When an optical link risk does not cause a fault, deterioration of the performance data can be found in advance based on a feature, to perform identification and warning.
    Type: Grant
    Filed: August 22, 2022
    Date of Patent: January 9, 2024
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Xin Xiao, Zhao Zhang, Jian Li, Yunpeng Gao
  • Patent number: 11871164
    Abstract: An optical access network includes an optical hub having at least one processor. The network further includes a plurality of optical distribution centers connected to the optical hub by a plurality of optical fiber segments, respectively, and a plurality of geographic fiber node serving areas. Each fiber node serving area of the plurality of fiber node serving areas includes at least one optical distribution center of the plurality of optical distribution centers. The network further includes a plurality of endpoints. Each endpoint of the plurality of endpoints is in operable communication with at least one optical distribution center. The network further includes a point-to-point network provisioning system configured to (i) evaluate each potential communication path over the plurality of optical fiber segments between a first endpoint and a second endpoint, and (ii) select an optimum fiber path based on predetermined path selection criteria.
    Type: Grant
    Filed: September 16, 2022
    Date of Patent: January 9, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Luis Alberto Campos, Zhensheng Jia, Carmela Stuart
  • Patent number: 11860413
    Abstract: Described herein are photonic communication platforms that can overcome the memory bottleneck problem, thereby enabling scaling of memory capacity and bandwidth well beyond what is possible with conventional computing systems. Some embodiments provide photonic communication platforms that involve use of photonic modules. Each photonic module includes programmable photonic circuits for placing the module in optical communication with other modules based on the needs of a particular application. The architecture developed by the inventors relies on the use of common photomask sets (or at least one common photomask) to fabricate multiple photonic modules in a single wafer. Photonic modules in multiple wafers can be linked together into a communication platform using optical or electronic means.
    Type: Grant
    Filed: November 29, 2022
    Date of Patent: January 2, 2024
    Assignee: Lightmatter, Inc.
    Inventors: Nicholas C. Harris, Carl Ramey, Michael Gould, Thomas Graham, Darius Bunandar, Ryan Braid, Mykhailo Tymchenko
  • Patent number: 11855851
    Abstract: A lazy graph construction with compression includes receiving a query related to a network; one of generating a site graph for the network and accessing the site graph already in memory; performing a search on the site graph based on the query; accessing data in a database and generating, in the memory, a plurality of sub-graphs using the data, for the query; and providing a solution to the query based on the search and a search of the plurality of sub-graphs. The site graph can be at a site level and includes network elements and associated connections in the network, and the plurality of sub-graphs can be at an intra-site level including any of component-to-component connections and intra-component connections.
    Type: Grant
    Filed: March 9, 2022
    Date of Patent: December 26, 2023
    Assignee: Ciena Corporation
    Inventors: Andrew D. Shiner, Frederic Poulin, Alex W. MacKay
  • Patent number: 11855670
    Abstract: A system that incorporates aspects of the subject disclosure may perform operations including, for example, obtaining uplink information associated with a downlink path, wherein the uplink information includes operational parameters used by a plurality of communication devices for transmitting wireless signals on a plurality of uplink paths; performing, based on the uplink information, a plurality of measurements of the plurality of uplink paths; identifying a measurement from the plurality of measurements that is below a threshold, thereby indicating an affected uplink path of the plurality of uplink paths; initiating a first filtering of the affected uplink path, wherein the initiating is based on the identifying and wherein the first filtering is based upon one or more first filtering parameters; and receiving instructions comprising one or more updated filtering parameters, wherein the instructions are received by the system at a port of the system. Other embodiments are disclosed.
    Type: Grant
    Filed: February 2, 2023
    Date of Patent: December 26, 2023
    Assignee: ISCO International, LLC
    Inventors: Igor Goodman, Amr Abdelmonem
  • Patent number: 11848704
    Abstract: A battery system includes: a plurality of battery modules including a plurality of battery cells, wherein each battery module comprises a battery module monitor configured to monitor a state of the battery cells; a battery system monitor; and an optical communication system configured to connect the battery module monitors with the battery system monitor over at least two communication paths, wherein the optical communication system is configured to use at least two different wavelengths of light to differentiate between the communication paths.
    Type: Grant
    Filed: April 12, 2021
    Date of Patent: December 19, 2023
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Maximilian Hofer, Roland Klobasa, Gernot Kraberger
  • Patent number: 11843391
    Abstract: This application discloses a temperature feedback control apparatus, method. The method includes two electric switches, a feedback control unit and an optical component. A first electric switch is configured to control that only a first channel of at least two channels that correspond to the first electric switch is conducted at a moment, to feed back an optical signal of a target optical component connected to the first channel to the feedback control unit. The feedback control unit is configured to calculate temperature of the corresponding optical component based on an electrical signal converted from the optical signal, to obtain a control signal. The second electric switch is configured to control, when the first channel is conducted, that only the second channel is conducted, to transmit the control signal to the target optical component to adjust its temperature. The optical component connects to both the first and second channels.
    Type: Grant
    Filed: September 20, 2021
    Date of Patent: December 12, 2023
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Xu Sun, Jiao Wang, Yuchen Liu, Rui Li, Nguyen Binh Le
  • Patent number: 11835768
    Abstract: Provided is an optical waveguide circuit in which the space between waveguides, a waveguide groove, or the space between fibers is filled with a resin where a wavelength shifts to positive (shifts backward) instead of a conventional resin where a wavelength shifts to negative (shifts forward), to return a refractive index having decreased by an instantaneous change to the original refractive index. In the filling resin with which the space between the waveguides, the waveguide groove, the space between the fibers, or the space between the fiber and the waveguide is filled, upon input of light, a refractive index of a portion through which the light passes instantaneously decreases, and then the refractive index gradually increases to compensate the initial decrease in the refractive index.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: December 5, 2023
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Katsuhiko Hirabayashi, Nobutatsu Koshobu, Ryoichi Kasahara
  • Patent number: 11836281
    Abstract: A transceiver lock insert may include a housing, a first connector housed at least partially within the housing and configured to communicatively and mechanically couple to a transceiver module, a second connector housed at least partially within the housing and configured to communicatively and mechanically couple to a cable, transmission media communicatively coupled between the first connector and the second connector and configured to communicatively couple the transceiver module to the cable, and a lock housed within the housing and configured to, when the transceiver lock insert is inserted into the transceiver module, secure the transceiver lock insert to the transceiver module to prevent access by a person to a release mechanism of the transceiver module.
    Type: Grant
    Filed: January 12, 2021
    Date of Patent: December 5, 2023
    Assignee: Dell Products L.P.
    Inventors: Victor B. Teeter, Shree Rathinasamy
  • Patent number: 11832364
    Abstract: Disclosed herein is an integrated photonics device including a frequency stabilization subsystem for monitoring and/or adjusting the wavelength of light emitted by one or more light sources. The device can include one or more selectors that can combine, select, and/or filter light along one or more light paths, which can include light emitted by a plurality of light sources. Example selectors may include, but are not limited to, an arrayed waveguide grating (AWG), a ring resonator, a plurality of distributed Bragg reflectors (DBRs), a plurality of filters, and the like. Output light paths from the selector(s) can be input into one or more detector(s). The detector(s) can receive the light along the light paths and can generate one or more signals as output signal(s) from the frequency stabilization subsystem.
    Type: Grant
    Filed: July 12, 2021
    Date of Patent: November 28, 2023
    Inventors: Alfredo Bismuto, Yi-Kuei Ryan Wu, Thomas Schrans, Andrea Trita, Aaron Zilkie
  • Patent number: 11822118
    Abstract: An integrated photonic device for wavelength division multiplexing comprises: a wavelength-splitting/combining component configured to be re-used for both splitting a single signal to be split, wherein the signal to be split comprises plural wavelengths, to plural split signals, wherein each of the plural split signals is related to a unique wavelength band, and combining plural signals to be combined, wherein each of the plural signals to be combined is related to a unique wavelength band, to a single combined signal, wherein the wavelength-splitting/combining component comprises at least one output channel for providing an output signal and at least one response channel for receiving a response input signal from a light interaction induced by the output signal, wherein the output channel and the response channel are connected to different ports of the wavelength-splitting/combining component.
    Type: Grant
    Filed: June 28, 2022
    Date of Patent: November 21, 2023
    Assignees: IMEC VZW, UNIVERSITEIT GENT
    Inventors: Wim Bogaerts, Wouter Jan Westerveld, Roelof Jansen
  • Patent number: 11824628
    Abstract: 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 over such connections, each carrying a data stream. The subcarriers may be generated by a combination of a laser and a modulator. As the capacity requirements of the leaf nodes change, the number of subcarriers associated with, and thus the amount of data provided to, each node, may be changed accordingly.
    Type: Grant
    Filed: December 24, 2021
    Date of Patent: November 21, 2023
    Assignee: Infinera Corporation
    Inventors: Jeffrey T. Rahn, Kuang-Tsan Wu, Steven J. Hand, David F. Welch
  • Patent number: 11817905
    Abstract: An object is to provide an optical transceiver in which two single-core bidirectional optical communication devices are mounted on a single substrate. A first substrate includes an electric connector connected to an optical transmission apparatus, and a signal processing circuit processing electric signals that are input to and output from first and second optical transceiver modules. Components outputting a control signal to the signal processing circuit is mountd on a second substrate. A flexible printed circuit connects the first substrate to the first and second optical transceiver modules.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: November 14, 2023
    Assignee: NEC CORPORATION
    Inventor: Akira Masuda
  • Patent number: 11792556
    Abstract: Implementations described and claimed herein provide systems and methods for a configurable optical peering fabric to dynamically create a connection between participant sites without any physical site limitations or necessity of specialized client and network provider equipment being located within such a facility. Client sites to a network may connect to a configurable switching element to be interconnected to other client sites in response to a request to connect the first client site with a second site, also connected to network, via the switching element. A request may trigger verification of the requested and, upon validation, transmission of an instruction to the switching element to enable the cross connect within the switching element. The first site and the second site may thus be interconnected via the switching element in response to the request, without the need to co-locate equipment or to manually install a jumper between client equipment.
    Type: Grant
    Filed: November 18, 2022
    Date of Patent: October 17, 2023
    Assignee: Level 3 Communications, LLC
    Inventors: Laurel Clark, Clyde David Cooper, III, Andrew Dugan
  • Patent number: 11791893
    Abstract: 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 segments of optical fibers, optical amplifiers, optical splitters/combiners, and optical add/drop multiplexer, for example. Optical subcarriers may be transmitted over such connections, each carrying a data stream. The subcarriers may be generated by a combination of a laser and a modulator, such that multiple lasers and modulators are not required, and costs may be reduced.
    Type: Grant
    Filed: December 24, 2021
    Date of Patent: October 17, 2023
    Assignee: Infinera Corporation
    Inventors: Jeffrey T. Rahn, Kuang-Tsan Wu, Steven J. Hand, David F. Welch
  • Patent number: 11777608
    Abstract: This application provides a data transmission method and apparatus. The method includes: processing, by a network device, a to-be-sent optical data unit ODU to obtain another ODU, where a bit rate of the another ODU is lower than a bit rate of the ODU; and sending, by the network device, the another ODU. In embodiments of this application, the ODU is processed to obtain the another ODU with a lower bit rate, and this helps reduce a rate increase when service data is transmitted in an OTN, so as to reduce an OTN interface rate and OTN costs.
    Type: Grant
    Filed: August 5, 2022
    Date of Patent: October 3, 2023
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Wei Su, Qiuyou Wu, Huaping Qing
  • Patent number: 11777633
    Abstract: A TORminator module is disposed with a switch linecard of a rack. The TORminator module receives downlink electrical data signals from a rack switch. The TORminator module translates the downlink electrical data signals into downlink optical data signals. The TORminator module transmits multiple subsets of the downlink optical data signals through optical fibers to respective SmartDistributor modules disposed in respective racks. Each SmartDistributor module receives multiple downlink optical data signals through a single optical fiber from the TORminator module. The SmartDistributor module demultiplexes the multiple downlink optical data signals and distributes them to respective servers. The SmartDistributor module receives multiple uplink optical data signals from multiple servers and multiplexes them onto a single optical fiber for transmission to the TORminator module.
    Type: Grant
    Filed: January 24, 2022
    Date of Patent: October 3, 2023
    Assignee: Ayar Labs, Inc.
    Inventors: Vladimir Stojanovic, Alexandra Wright, Chen Sun, Mark Wade, Roy Edward Meade
  • Patent number: 11770186
    Abstract: 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 enable a service, each path requiring a quantity of exclusive licenses. The network service system receives a path failure notice indicating a working path failure, calculates the quantity of licenses required by the restored path, releases the quantity of licenses required by the working path and applies at least a portion of the quantity of licenses to the quantity of licenses required by the restored path.
    Type: Grant
    Filed: March 21, 2022
    Date of Patent: September 26, 2023
    Assignee: Infinera Corporation
    Inventors: Rajan Rao, Wayne Wauford, Vinesh Raghavan, Prasanjeet Khuntia
  • Patent number: 11764870
    Abstract: An optical signal monitor, including: a storage that holds a threshold value set for each of determination areas having a bandwidth set in accordance with an average grid of dummy light; a measurement section that sequentially measures an optical intensity of an inputted wavelength-multiplexed optical signal with respect to each of measurement areas obtained by dividing the determination area into areas with a bandwidth sufficiently smaller than a grid width of a monitoring-target optical signal composing the wavelength-multiplexed optical signal, and output measured values; and a section that determines that dummy light corresponding to the determination area needs introducing if each of measured values in the determination area is smaller than a threshold value, and, determines that dummy light corresponding to the determination area does not need introducing if at least one of the measured values in the determination area is equal to or larger than the threshold value.
    Type: Grant
    Filed: November 15, 2021
    Date of Patent: September 19, 2023
    Assignee: NEC CORPORATION
    Inventor: Yoshirou Satou
  • Patent number: 11754861
    Abstract: Embodiments include apparatuses, methods, and systems including a dynamic polarization controller (DPC) to receive a first light beam and a second light beam, to adjust a rotation of a state of polarization (SOP) of the first light beam and the second light beam to generate a third light beam and a fourth light beam, under the control of a first control signal, a second control signal, and a third control signal. The first control signal may be related to a phase difference between the third light beam and the fourth light beam, the second control signal may be related to an intensity difference between the third light beam and the fourth light beam, and the third control signal may be related to a rotation of a SOP of the third light beam and the fourth light beam. Other embodiments may also be described and claimed.
    Type: Grant
    Filed: June 28, 2021
    Date of Patent: September 12, 2023
    Assignee: INTEL CORPORATION
    Inventors: Taehwan Kim, Ganesh Balamurugan, Hao Li, Hasitha Jayatilleka
  • Patent number: 11722223
    Abstract: An objective of the present invention is to provide an optical communication system and an optical communication method that can reduce even a delay generated in processing of obtaining a transfer function for correcting distortion in digital coherent transmission. In the optical communication system according to the present invention, pilot data for estimating a transfer function for a transmission channel is transmitted through a transmission channel with a short transmission delay time, a transfer function of the transmission channel is estimated before receiving transmission data, and the transfer function is applied to other transmission channels.
    Type: Grant
    Filed: August 19, 2019
    Date of Patent: August 8, 2023
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yuto Sagae, Takashi Matsui, Taiji Sakamoto, Kazuhide Nakajima
  • Patent number: 11703676
    Abstract: An optical receiving module may include: a light transmitting body configured to transmit light; a light incidence part through which light is incident into the light transmitting body; and a plurality of reflectors configured to reflect the light incident from the light incidence part a plurality of times, such that the light is incident toward a light receiver unit.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: July 18, 2023
    Assignee: Hyundai Mobis Co., Ltd.
    Inventors: Young Shin Kim, Sung Eun Jo, Kyung Rin Kim, Won Gyum Kim
  • Patent number: 11693186
    Abstract: Disclosed are apparatus and methods for optical coupling. In one example, a described apparatus includes: a planar layer; a grating region comprising an array of scattering elements arranged in the planar layer to form a two-dimensional grating; a first taper structure formed in the planar layer connecting a first side of the grating region to a first waveguide, wherein a shape of the first taper structure is a first triangle that is asymmetric about any line perpendicular to the first side of the grating region in the planar layer; and a second taper structure formed in the planar layer connecting a second side of the grating region to a second waveguide, wherein a shape of the second taper structure is a second triangle that is asymmetric about any line perpendicular to the second side of the grating region in the planar layer, wherein the first side and the second side are substantially perpendicular to each other.
    Type: Grant
    Filed: April 1, 2021
    Date of Patent: July 4, 2023
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Chih-Tsung Shih, Chewn-Pu Jou, Stefan Rusu, Felix Ying-Kit Tsui, Lan-Chou Cho
  • Patent number: 11689282
    Abstract: An example system includes a transceiver and a microcontroller. The microcontroller is configured to receive, from first and second network interfaces of the transceiver, a plurality of messages from a hub node and the leaf nodes. Each of the messages corresponds to a respective one of the ingress or egress data flows. The microcontroller is also configured generate a resource assignment map based on the messages. The resource assignment map includes pairings between a respective one of the ingress data flows and a respective one of the egress data flows, and, for each of the pairings, an indication of a respective network resource assigned to exchange the egress data flow of that pairing with a respective one of the leaf nodes. The microcontroller is also configured to generate a command to cause the transceiver to transmit the egress data flows in accordance with the resource assignment map.
    Type: Grant
    Filed: July 6, 2021
    Date of Patent: June 27, 2023
    Assignee: Infinera Corporation
    Inventors: Rajan Rao, Steven J. Hand, Vasudha Bhaskara
  • Patent number: 11682879
    Abstract: A laser light generator is configured to generate one or more wavelengths of continuous wave laser light. The laser light generator is configured to collectively and simultaneously transmit each of the wavelengths of continuous wave laser light through an optical output of the laser light generator as a laser light supply. An optical fiber is connected to receive the laser light supply from the optical output of the laser light generator. An optical distribution network has an optical input connected to receive the laser light supply from the optical fiber. The optical distribution network is configured to transmit the laser light supply to each of one or more optical transceivers and/or optical sensors. The laser light generator is physically separate from each of the one or more optical transceivers and/or optical sensors.
    Type: Grant
    Filed: January 24, 2022
    Date of Patent: June 20, 2023
    Assignee: Ayar Labs, Inc.
    Inventors: Milos Popovic, Rajeev Ram, Vladimir Stojanovic, Chen Sun, Mark Taylor Wade, Alexandra Carroll Wright
  • Patent number: 11664945
    Abstract: The present invention discloses a method and an apparatus for indicating a channel in a wireless local area network WLAN. A sending station generates and sends a physical protocol data unit PPDU, the PPDU includes a preamble field and a data field, a high efficiency signal field HE-SIG-A of the preamble field includes a bandwidth identifier and a channel bonding identifier, and the channel bonding identifier is used to indicate whether a data transmission channel is continuous in a frequency domain. In the foregoing manner, a discontinuous channel in a frequency domain in a wireless local area network is indicated, an available channel for data transmission is improved, and a system throughput is increased.
    Type: Grant
    Filed: October 25, 2021
    Date of Patent: May 30, 2023
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yunbo Li, Yanchun Li, Le Liu, Jiayin Zhang, Ming Gan
  • Patent number: 11664920
    Abstract: An optical transmission apparatus includes a multiplexing unit multiplexing signal light of a main signal, and dummy lights of odd channel and an even channel emitted using first and second dummy light sources, respectively, a detection unit detecting abnormality of the first and second dummy light sources, and a control unit performing addition control. The addition control includes control in such a way that dummy light of an even channel emitted using the first dummy light source is additionally multiplexed with the signal light, when no abnormality is found in the first dummy light source and an abnormality of the second dummy light source is detected, and that dummy light of an odd channel emitted using the second dummy light source is additionally multiplexed with the signal light, when no abnormality is found in the second dummy light source and an abnormality of the first dummy light source is detected.
    Type: Grant
    Filed: September 2, 2021
    Date of Patent: May 30, 2023
    Assignee: NEC CORPORATION
    Inventor: Yoshirou Satou
  • Patent number: 11630799
    Abstract: A hybrid electrical and optic system-on-chip (SOC) device configured for both electrical and optic communication includes a substrate, an electrical device configured for electrical communication arranged on the substrate, a photonics device configured for optic communication arranged on the substrate, and a self-test module arranged on the substrate. The self-test module is configured to receive a loop-back signal indicative of an optical signal output from the photonics device and calibrate the photonics device based on the loop-back signal.
    Type: Grant
    Filed: May 23, 2022
    Date of Patent: April 18, 2023
    Assignee: Marvell Asia Pte Ltd.
    Inventors: Radhakrishnan L. Nagarajan, Chao Xu
  • Patent number: 11630261
    Abstract: One embodiment described herein provides a co-packaged optics (CPO) switch assembly. The CPO switch assembly includes a switch integrated circuit (IC) chip and a number of optical modules coupled to the switch IC chip. The switch IC chip and the optical modules are co-packaged within a same physical enclosure. The switch IC chip includes a switch logic and a digital signal processing (DSP) unit, and a respective optical module comprises: a photonic integrated chip (PIC), a first amplifier module, and a second amplifier module.
    Type: Grant
    Filed: April 29, 2021
    Date of Patent: April 18, 2023
    Assignee: ALIBABA SINGAPORE HOLDING PRIVATE LIMITED
    Inventor: Chongjin Xie
  • Patent number: 11626937
    Abstract: A node (10) includes multiplexing unit (11) that multiplexes a plurality of subcarrier signals for performing optical wavelength multiplexing communication into a wavelength group signal; output unit (12) that outputs the multiplexed wavelength group signal to an optical transmission line; pre-multiplexing level correction unit (13) that corrects a level deviation between the subcarrier signals before the multiplexing based on an optical level of the wavelength group signal in the output unit (12); and post-multiplexing level correction unit (14) that corrects a level deviation of the wavelength group signal after the multiplexing including the corrected subcarrier signals based on the optical level of the wavelength group signal in the output unit (12).
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: April 11, 2023
    Assignee: NEC CORPORATION
    Inventors: Takefumi Oguma, Yurie Matsuyama
  • Patent number: 11621795
    Abstract: Provided is an optical communication system comprising a polarization-diversity optical power supply capable of supplying light over a non-polarization-maintaining optical fiber to a polarization-sensitive modulation device. In an example embodiment, the polarization-diversity optical power supply operates to accommodate random polarization fluctuations within the non-polarization-maintaining optical fiber and enables an equal-power split at a passive polarization splitter preceding the polarization-sensitive modulation device.
    Type: Grant
    Filed: June 1, 2020
    Date of Patent: April 4, 2023
    Assignee: Nubis Communications, Inc.
    Inventor: Peter Johannes Winzer
  • Patent number: 11616576
    Abstract: Transmit-side equalization is disclosed for network devices and network communications methods employing onboard/co-packaged optics. An illustrative network device includes a substrate having a host device IC (integrated circuit) and an optical module IC connected by a short-reach link. The optical module IC having a transmit chain includes a CTLE (continuous time linear equalizer) to at least partly compensate for a channel response of the short-reach link, and a driver that amplifies an output of the CTLE for a photoemitter that couples to an optical fiber.
    Type: Grant
    Filed: July 7, 2021
    Date of Patent: March 28, 2023
    Assignee: CREDO TECHNOLOGY GROUP LTD
    Inventors: Junqing Sun, Haoli Qian
  • Patent number: 11611405
    Abstract: An optical communications network comprises optical data links interconnected by add-drop nodes, the optical data links comprising data channels. The data channels are allocated into equal-sized bins. In response to a first data channel request between a given source-destination pair, one of the equal-sized bins is assigned to the data channel request. In response to requests for additional bandwidth for the same source-destination data channel request, unused channels within the assigned equal-sized bin are allocated to the data channel request. In response to subsequent data channel requests between different source-destination pairs, additional unallocated equal-sized bins are assigned to the subsequent data channel requests. In response to subsequent data channel requests when resource sharing for one equal-sized bin, data channels in the last equal-sized bin are assigned using the reverse channel assignment process. Reverse channel assignment can also be used for other bins as an option.
    Type: Grant
    Filed: August 11, 2020
    Date of Patent: March 21, 2023
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Yawei Yin, Karthikeyan Balasubramanian