Patents Examined by Hanh Phan
  • Patent number: 11122347
    Abstract: Methods, systems, and apparatus, including an apparatus for generating clusters of building blocks of compute nodes using an optical network. In one aspect, a method includes receiving data specifying requested compute nodes for a computing workload. The data specifies a target arrangement of the nodes. A subset of building blocks of a superpod is selected. A logical arrangement of the subset of compute nodes that matches the target arrangement is determined. A workload cluster of compute nodes that includes the subset of the building blocks is generated. For each dimension of the workload cluster, respective routing data for two or more OCS switches for the dimension is configured. One-to-many switches are configured such that a second compute node of each segment of compute nodes is connected to a same OCS switch as a corresponding first compute node of a corresponding segment to which the second compute node is connected.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: September 14, 2021
    Assignee: Google LLC
    Inventor: Jeremiah Willcock
  • Patent number: 11121778
    Abstract: A known pattern comparison type phase difference detection unit (12) detects a phase difference between a known pattern extracted from a received signal and a true value of the known pattern as a first phase difference. M indicates the number of modulation phases in a phase modulation method of the received signal. An M-th power type phase difference detection unit (13) removes a modulation component by raising the received signal to M-th power, and detects phase variation from a modulation phase point used for mapping on a transmission side, as a second phase difference. A phase compensation unit (11) compensates phase variation of the received signal based on an addition result of the first phase difference and the second phase difference.
    Type: Grant
    Filed: July 22, 2019
    Date of Patent: September 14, 2021
    Assignees: NTT ELECTRONICS CORPORATION, NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tomohiro Takamuku, Mitsuteru Yoshida, Tsutomu Takeya, Katsuichi Oyama, Hiroyuki Nouchi, Atsushi Suenaga
  • Patent number: 11118366
    Abstract: A system used to monitor and control a pool using a visual light communication system is disclosed.
    Type: Grant
    Filed: June 12, 2020
    Date of Patent: September 14, 2021
    Assignee: Elliptic Works, LLC
    Inventors: Sean Walsh, John Bouvier
  • Patent number: 11115126
    Abstract: An injection locked transmitter for an optical communication network includes a master seed laser source input substantially confined to a single longitudinal mode, an input data stream, and a laser injected modulator including at least one slave laser having a resonator frequency that is injection locked to a frequency of the single longitudinal mode of the master seed laser source. The laser injected modulator is configured to receive the master seed laser source input and the input data stream, and output a laser modulated data stream.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: September 7, 2021
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Zhensheng Jia, Luis Alberto Campos, Curtis Dean Knittie, Jing Wang
  • Patent number: 11115127
    Abstract: A solid obstacle is removed with a high-power laser beam to establish a transmission path for a spatial laser communication. When a space in which the laser beam is transmitted is blocked off by the solid obstacle, the spatial laser communication cannot be carried out.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: September 7, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Shingo Nishikata, Hiroshi Arakawa, Yoshikatsu Kuroda, Hiroshi Ikebuchi, Yukito Hata, Yuichi Araki, Koichi Hamamoto, Tomoya Morioka, Atsushi Ochiai
  • Patent number: 11105901
    Abstract: Provided is a surveying instrument comprises a total station, a mounting base which is fixed on an upper surface of the total station at three points, and a two-dimensional laser scanner which is fixed on an upper surface of the mounting base at three points, wherein the total station is configured to perform a three-dimensional measurement of a measuring point by a first distance measuring light, wherein the two-dimensional laser scanner is configured to acquire point cloud data along a scanning line by a second distance measuring light.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: August 31, 2021
    Assignee: TOPCON Corporation
    Inventors: Naoto Takahashi, Yasushi Tanaka
  • Patent number: 11101914
    Abstract: An optical transmission system includes a plurality of transmission paths that transmit a mode multiplexing signal, and one or more mode permutation units provided between the transmission paths. The mode permutation unit performs mode permutation to interchange modes to be used between at least some optical signals among respective optical signals of a plurality of types of modes that are multiplexed to the mode multiplexing signal input from the transmission path on an input side, and outputs the mode multiplexing signal subjected to the mode permutation to the transmission path on an output side.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: August 24, 2021
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Koki Shibahara, Takayuki Mizuno, Yutaka Miyamoto
  • Patent number: 11088761
    Abstract: An injection locked transmitter for an optical communication network includes a master seed laser source input substantially confined to a single longitudinal mode, an input data stream, and a laser injected modulator including at least one slave laser having a resonator frequency that is injection locked to a frequency of the single longitudinal mode of the master seed laser source. The laser injected modulator is configured to receive the master seed laser source input and the input data stream, and output a laser modulated data stream.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: August 10, 2021
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Chuang Zhou, Zhensheng Jia, Luis Alberto Campos, Curtis Dean Knittle, Jing Wang
  • Patent number: 11082134
    Abstract: There is provided a Kramers-Kronig receiver, comprising a reception path; wherein the reception path comprises: a Stokes receiver that is configured to receive a polarization-multiplexed signal and to output a Stokes vector; wherein the polarization-multiplexed signal comprises a first modulated signal, a second modulated signal and a continuous wave signal; wherein the first modulated signal is of a first polarization; wherein the second modulated signal is of a second polarization; wherein the continuous wave signal is of the first modulation or of the second modulation; a set of analog to digital converters that are configured to generate a digital representation of the Stokes vector; and a digital processor that is configured to process the digital representation of the Stokes vector to provide a reconstructed polarization-multiplexed signal, wherein the processing is based on a Kramers-Kronig relationship related to the polarization-multiplexed signal.
    Type: Grant
    Filed: September 21, 2020
    Date of Patent: August 3, 2021
    Assignee: RAMOT AT TEL-AVIV UNIVERSITY LTD.
    Inventors: Mark Shtaif, Antonio Mecozzi, Cristian Antonelli
  • Patent number: 11082146
    Abstract: A method for efficient utilization of a transport capacity provided by an optical transport network includes mapping client signals comprising lower order optical data units into optical data tributary units, each requiring a number of tributary slots of an aggregate payload area having a size corresponding to the available aggregated OPU payload areas of Nx independent higher order optical data units to be transported. The method further includes multiplexing the optical data tributary units into the aggregate payload area. The method further includes mapping the tributary slots of the aggregate payload area into tributary slots provided by the OPU payload areas of the Nx independent higher order Optical data units according to a predefined mapping rule. The method further includes multiplexing the Nx independent optical data units containing the payload areas or transmitting them as optical transport units.
    Type: Grant
    Filed: February 5, 2020
    Date of Patent: August 3, 2021
    Assignee: ADVA OPTICAL NETWORKING SE
    Inventor: Oliver Bleck
  • Patent number: 11075698
    Abstract: The disclosure relates to technology for signal transmission in an optical communication system. An optical transmitter comprises a directly modulated laser (DML) configured to generate a modulated optical signal in response to a modulation signal. The modulated optical signal comprises a first frequency corresponding to a logical one value in the modulation signal and a second frequency corresponding to a logical zero value in the modulation signal. The modulated optical signal has a modulation symbol rate of “R”. The transmitter comprises a controller configured to control the DML to establish a target frequency gap between the first frequency and the second frequency. The transmitter also comprises an optical band pass filter (OBPF) coupled to the DML to receive the modulated optical signal and output a filtered optical signal. The OBPF has a 3-dB bandwidth of less than R.
    Type: Grant
    Filed: August 3, 2020
    Date of Patent: July 27, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Xiang Liu, Ning Cheng, Frank Effenberger
  • Patent number: 11064636
    Abstract: Exemplary embodiments are disclosed of EMI shields including electrically-conductive foam (broadly, electrically-conductive resiliently compressible porous material). An exemplary embodiment includes an electromagnetic interference (EMI) shield for an optical transceiver including transmitter and receiver optical sub-assemblies. The EMI shield includes a portion having openings configured for receiving the transmitter and receiver optical sub-assemblies therethrough to thereby allow the EMI shield to be fit over the transmitter and receiver optical sub-assemblies for installation along a portion of the optical transceiver. The EMI shield also includes sidewalls depending from the portion that includes the openings. Electrically-conductive resiliently compressible porous material (e.g., electrically-conductive foam, etc.) is along at least a portion of an outer perimeter defined by the sidewalls.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: July 13, 2021
    Assignee: Laird Technologies, Inc.
    Inventors: Yongxue He, Waleed Alam
  • Patent number: 11063671
    Abstract: Methods and systems for redundant light sources by utilizing two inputs of an integrated modulator are disclosed and may include: an optoelectronic transmitter with first and second laser sources for providing optical signals to the transmitter, the transmitter comprising an optical modulator with a first input waveguide coupled to the first laser source and second input waveguide coupled to the second laser source, the optoelectronic receiver being operable to: configure the first laser source to provide an optical signal to the first input of the optical modulator; and if the first laser source does not provide an optical signal, configure the second laser source to provide an optical signal to the second input of the optical modulator. The first laser source may be optically coupled to the first input waveguide and the second laser source optically coupled to the second input waveguide using grating couplers.
    Type: Grant
    Filed: February 13, 2020
    Date of Patent: July 13, 2021
    Assignee: Luxtera LLC
    Inventors: Greg Young, Peter DeDobbelaere
  • Patent number: 11057691
    Abstract: A system for routing signals in a Distributed Antenna System (DAS) includes one or more local Digital Access Units (DAUs) located at a local location and one or more remote DAUs located at one or more remote locations. Each of the one or more local DAUs includes an optical port coupled to an upstream unit. The upstream unit includes at least one of a repeater, a baseband unit, a Base Transceiver Station (BTS), or a DAU. The one or more remote DAUs are coupled to the one or more local DAUs via one or more optical cables. A distance between the local location and each of the one or more remote locations is greater than two kilometers.
    Type: Grant
    Filed: July 15, 2020
    Date of Patent: July 6, 2021
    Assignee: DALI WIRELESS, INC.
    Inventors: Shawn Patrick Stapleton, Sasa Trajkovic
  • Patent number: 11044035
    Abstract: An apparatus includes a reconfigurable optical add/drop multiplexer (ROADM) having an input port to receive a first optical signal from a second device. The ROADM also includes a first wavelength selective switch (WSS), in optical communication with the input port, to convert the first optical signal into a second optical signal, a loopback, in optical communication with the first WSS, to transmit the second optical signal, and a second WSS, in optical communication with the loopback, to convert the second optical signal to a third optical signal and direct the third optical signal back to the second device via the input port.
    Type: Grant
    Filed: March 31, 2020
    Date of Patent: June 22, 2021
    Assignee: Juniper Networks, Inc.
    Inventors: Gert Grammel, Ajay Kachrani, Patrick Michael McEachern
  • Patent number: 11038590
    Abstract: An optical transmission device includes: a controlled oscillator for outputting a calibration signal having an output frequency that corresponds to an input oscillation control signal; an electrical-to-optical conversion circuit for generating an optical transmission signal by superimposing a transmission signal in a radio frequency band and the calibration signal on an optical wave; an optical input and output unit for sending the optical transmission signal to an optical transmission path and receiving a reflection signal that is a part of the optical transmission signal from an optical reception device; an optical-to-electrical converter for converting the reflection signal into a radio frequency signal; a phase locked loop for generating the oscillation control signal so that radio frequency output of the optical-to-electrical converter is phase-locked with a reference signal input from a reference signal source; and a signal generation circuit for generating, as the transmission signal, the radio frequen
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: June 15, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Junya Nishioka, Eisuke Haraguchi, Akihiro Fujie, Toshiyuki Ando
  • Patent number: 11032009
    Abstract: Disclosed herein is a method of transmitting a signal of a user equipment (UE) in a wireless communication system. The method includes generating an optical signal related to data transmission, combining an electrical signal for the data with the optical signal, and transmitting a combined signal.
    Type: Grant
    Filed: July 23, 2020
    Date of Patent: June 8, 2021
    Assignees: LG ELECTRONICS INC., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Hojae Lee, Sangrim Lee, Kyungmin Woo, Hoon Kim
  • Patent number: 11032628
    Abstract: Device, methods and systems for the electronic demodulation of optically phase demodulated signals are described. An example optical local oscillator generator configured to generate a radio frequency (RF) tone at a desired RF frequency includes a first input configured to receive a broadband optical pulse train, a second input coupled to a delay line interferometer to receive a first control voltage for controlling a delay value of the interferometer and to produce an output optical pulse train, a dispersive element, coupled to the delay line interferometer, to map the output optical pulse train to a time-domain modulated optical pulse train, an optical-to-electrical converter, coupled to the dispersive element, to convert the time-domain modulated optical pulse train to an analog electrical signal, and an RF filter, coupled to the optical-to-electrical converter, to filter the analog electrical signal to generate the RF tone at the desired RF frequency.
    Type: Grant
    Filed: May 7, 2020
    Date of Patent: June 8, 2021
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: David Simon Perlmutter, Peter Thomas Setsuda DeVore, Apurva Shantharaj Gowda, Jason Thomas Chou
  • Patent number: 11032007
    Abstract: Techniques are described for relaying of high-band radiofrequency communications through a window that would otherwise partially or completely block the communications. For example, embodiments include a pair of high-band-to-optical (HB2O) relays mounted on either side of a window. One of the relays receives a high-band radiofrequency (HB-RF) communication signal that is unable to pass through the window and converts the HB-RF communication signal to an optical communication signal. As the window is substantially transparent to visible-spectrum light, the optical communication signal can pass through the window. The optical communication signal is transmitted through the window to the other HB2O relay, and the other HB2O relay converts back to a HB-RF communication signal. Thus, HB-RF networks on either side of the window can be communicatively coupled via the optical communications provided by the pair of relays.
    Type: Grant
    Filed: May 12, 2020
    Date of Patent: June 8, 2021
    Assignee: DISH Wireless L.L.C.
    Inventor: Scott Parker
  • 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