Patents Examined by Jai M Lee
  • Patent number: 11962345
    Abstract: Chromatic dispersion compensation is performed in one or more pluggable optical transceiver (POT) devices operating within an intensity-modulated direct-detection (IMDD) optical network. Compensation is performed within each POT using an electrical and/or optical chromatic dispersion module which are controlled by a set of parameters. A network computing device includes a computer processor and a host management interface for communicating with the POT. In the event of a link failure, the computer processor determines a second set of parameters to control the one or more dispersion compensation module(s) of the POT. The second set of parameters are different from a first set of parameters used to control the one or more compensation module(s) in the case of a first optical path. The computer processor causes the POT to use the second set of parameters in place of the first set of parameters.
    Type: Grant
    Filed: January 21, 2022
    Date of Patent: April 16, 2024
    Assignee: PRECISION OPTICAL TECHNOLOGIES, INC.
    Inventors: David M. Calhoun, Christopher Page
  • Patent number: 11953193
    Abstract: A device comprises an enclosure having a rear opening adapted to receive a light beam from a light source, a front opening adapted to emit a modified light beam, and internal walls extending between the rear opening and the front opening. The light beam is modified according to a perimeter of the front opening. A light shaping assembly comprises a two-dimensional array formed of a plurality of such devices, each one of the plurality of devices being adapted to receive a light beam from a corresponding light source.
    Type: Grant
    Filed: September 10, 2021
    Date of Patent: April 9, 2024
    Assignee: SACO TECHNOLOGIES INC.
    Inventors: Bassam Jalbout, Brian Wong
  • Patent number: 11949454
    Abstract: There is provided an optical network device (30) comprising separate downstream and upstream signal paths (33, 34) disposed between a wavelength division multiplexing unit (16) and a signal splitting element (32, 44, 50), an optical to electrical signal converter (18) disposed in the downstream path and an electrical to optical signal converter (22) disposed in the upstream path, wherein the signal splitting element (32, 44, 50) is capable of splitting signals independent of signal frequency and is configured with an isolation of 30 to 50 dB thereby to substantially prevent leakage of downstream signals into upstream path (34). The signal splitting element is capable of splitting signals independent of signal frequency and may be a directional coupler, two-way signal splitter or hybrid coupler comprising at least two different types of coupler element.
    Type: Grant
    Filed: June 1, 2022
    Date of Patent: April 2, 2024
    Assignee: TECHNETIX B.V.
    Inventors: Martien Rijssemus, Matthijs Laro
  • Patent number: 11949453
    Abstract: A test device and method for testing a distributed feedback laser diode (DFB-LD) device for an optical transceiver of a radio over fiber (RoF) system examines the DFB-LD device based on an absolute limiting rating, an operating case environment, and a functional specification, in which the absolute limiting rating is a rating at which there is no fatal damage to the DFB-LD device during a short period of time when each limiting parameter is isolated and all other parameters are in a normal performance parameter, the operating case environment includes an operating temperature, and the functional specification includes parameters to be tested according to an operating condition for the functional specification.
    Type: Grant
    Filed: June 22, 2022
    Date of Patent: April 2, 2024
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Seung-Hyun Cho, Joon Ki Lee
  • Patent number: 11949501
    Abstract: A service mapping processing method for an optical transport network, an apparatus, and a system are provided, where the method includes: generating mapping adaptation indication information according to a mapping granularity of a to-be-carried LO ODU, where the mapping granularity is M×g bytes, M is a quantity of timeslots occupied by the to-be-carried LO ODU in an OPUCn, g is a size of a mapping granularity corresponding to each timeslot of the timeslots occupied by the LO ODU, and g is a positive integer greater than 1; mapping, according to the mapping adaptation indication information, the to-be-carried LO ODU to an ODTUCn.M payload area; encapsulating the mapping adaptation indication information into the ODTUCn.M overhead area; encapsulating the ODTUCn.M into an OTUCn; and sending the OTUCn to a receive end device. The method avoids that OTUCns that use different mapping granularities cannot interwork between a receive end and a transmit end.
    Type: Grant
    Filed: September 23, 2022
    Date of Patent: April 2, 2024
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Wei Su, Maarten Petrus Joseph Vissers, Qiuyou Wu
  • Patent number: 11936423
    Abstract: A fault detection apparatus includes: a transmitter that transmits a first optical signal through an optical transmission line; a receiver that receives, in response to the transmission of the first optical signal, a second optical signal from the line, and measures the reception level of the second optical signal; and a control unit that specifies a section where the second optical signal corresponding to the first optical signal was generated, calculates an optical level corresponding to a loss in said section on the basis of the reception level, determines that a first fault has occurred in the section when the optical level in the section has changed from a first reference level by a first threshold or more, sets a second reference level and a second threshold after occurrence of the first fault, and determines occurrence of a second fault.
    Type: Grant
    Filed: February 5, 2021
    Date of Patent: March 19, 2024
    Assignee: NEC CORPORATION
    Inventor: Akira Masuda
  • Patent number: 11936426
    Abstract: In an example embodiment, an optical communication system includes an implantable optical transmitter and an external optical receiver. The transmitter includes a housing having one or more drivers, plural light emitting sources, and an optical element arranged therein. Each driver converts a digital data signal into modulation signals to drive the sources. Each source generates a light beam in response to a corresponding modulation signal, each light beam contributing to form a single optical signal. The optical element directs the light beams to exit the housing such that a peak position of light intensity of each light beam is separated from a corresponding peak position of light intensity of an adjacent light beam by at least a first distance and less than a second distance. The optical receiver includes at least one photodiode that detects light generated by the sources and generates a reconstructed data signal.
    Type: Grant
    Filed: February 3, 2023
    Date of Patent: March 19, 2024
    Assignee: Wyss Center for Bio and Neuro Engineering
    Inventors: Florent Burdin, Tiago Bertolote, Olivier Coquoz
  • Patent number: 11936431
    Abstract: An optical transmission apparatus (1_1) according to the present invention includes a first transmission unit (11_1) that transmits a first optical transmission signal (21_1), a second transmission unit (11_2) that transmits a second optical transmission signal (21_2), and an output unit that outputs, when the first optical transmission signal (21_1) and the second optical transmission signal (21_2) share a set of information, both the first optical transmission signal (21_1) and the second optical transmission signal (21_2) to a first path (26_1) and outputs, when the first optical transmission signal (21_1) and the second optical transmission signal (21_2) do not share the set of information, one of the first optical transmission signal (21_1) and the second optical transmission signal (21_2) to a second path (26_2).
    Type: Grant
    Filed: March 2, 2023
    Date of Patent: March 19, 2024
    Assignee: NEC CORPORATION
    Inventor: Yoshiaki Aono
  • Patent number: 11930309
    Abstract: A photonics-electronics convergence switch with which, even if an optical network system is built by combining a plurality of packet switches, the amount of processing in the packet switches does not increase, the optical network system operates with low electric power consumption, and this enables wide-range optical communication between the nodes of a communication origin and of a communication partner, includes a network processor that is an electronic circuit configured to control the functions of the packet switch, a plurality of optical transmitter-receivers having photoelectric conversion functions, and a plurality of optical switches.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: March 12, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Keita Yamaguchi, Osamu Moriwaki, Shunichi Soma, Kenya Suzuki, Seiki Kuwabara, Tetsuro Inui, Shuto Yamamoto, Seiji Okamoto, Hideki Nishizawa
  • Patent number: 11921365
    Abstract: An isolator includes a first core, a second core, a nonreciprocal member, and a magnetic body. The first core and the second core extend in a first direction and are positioned side by side with a cladding therebetween in a second direction that intersects the first direction. The nonreciprocal member is in contact with at least a part of the second core while being positioned side by side with the second core in the second direction. In a magnetic field generated by the magnetic body in a portion where the nonreciprocal member is positioned, a component in a third direction perpendicular to the first direction and the second direction is greater than any component other than the component in the third direction.
    Type: Grant
    Filed: July 20, 2020
    Date of Patent: March 5, 2024
    Assignee: KYOCERA Corporation
    Inventors: Hiromichi Yoshikawa, Naoki Matsui, Tomoya Sugita
  • Patent number: 11923901
    Abstract: An electronic device may include an antenna that conveys wireless signals at frequencies greater than 100 GHz. The antenna may include a radiating element coupled to a uni-travelling-carrier photodiode (UTC PD). An optical path may illuminate the UTC PD using a first optical local oscillator (LO) signal and a second optical LO signal. An optical phase shift may be applied to the first optical LO signal. A Mach-Zehnder modulator (MZM) may be interposed on the optical path. During signal transmission, the MZM may modulate wireless data onto the second optical LO signal while control circuitry applies a first bias voltage to the UTC PD. During signal reception, the control circuitry may apply a second bias voltage to the UTC PD that configures the UTC PD to convert received wireless signals into intermediate frequency signals and/or optical signals.
    Type: Grant
    Filed: June 7, 2022
    Date of Patent: March 5, 2024
    Assignee: Appli Inc.
    Inventors: Zdravko Boos, Bertram R Gunzelmann
  • Patent number: 11916593
    Abstract: A free space optical (FSO) communication node communicates via an FSO link with a remote FSO communication node that moves relative to the FSO node. The FSO node may be highly directional, and transmit (Tx) and receive (Rx) beams of the FSO node may share optical paths (at least in part). Instead of directing a Tx beam along a point ahead angle relative to a Rx beam (which may result in undesirable Rx coupling losses), the Tx beam is directed based on the point ahead angle and a point ahead offset angle. The point ahead offset angle modifies the point ahead angle to reduce Rx coupling losses while keeping Tx pointing losses at least low enough to maintain the FSO link. In some cases, due to the point ahead offset angle, the Tx direction minimizes a sum of the Rx coupling losses and the Tx pointing losses.
    Type: Grant
    Filed: September 14, 2022
    Date of Patent: February 27, 2024
    Assignee: SA PHOTONICS, INC.
    Inventor: Mohammad Noshad Iranzad
  • Patent number: 11909512
    Abstract: A coherent optical injection locking (COIL) apparatus generates multiple optical source outputs from a single optical source generated by a parent laser. The COIL apparatus includes a plurality of optical source generators each having a child laser, of lesser performance than the parent laser, that is injection locked to the single optical source. The optical source generators may have one or both of a shared configuration and a cascaded configuration that replicates the single optical source, or a single wavelength of the single optical source when it is a comb source.
    Type: Grant
    Filed: March 9, 2022
    Date of Patent: February 20, 2024
    Assignee: CABLE TELEVISION LABORATORIES, INC.
    Inventors: Zhensheng Jia, David Daniel Smith, Junwen Zhang, Luis Alberto Campos, Curtis D. Knittle
  • Patent number: 11901950
    Abstract: An example system includes a first network device having first circuitry. The first network device is configured to perform operations including receiving data to be transmitted to a second network device over an optical communications network, and transmitting first information and second information to the second device. The first information is indicative of the data, and is transmitted using a first communications link of the optical communications network and using a first subset of optical subcarriers. The second information is indicative of the data, and is transmitted using a second communications link of the optical communications network and using a second subset of optical subcarriers. The first subset of optical subcarriers is different from the second subset of optical subcarriers.
    Type: Grant
    Filed: October 21, 2020
    Date of Patent: February 13, 2024
    Assignee: Infinera Corporation
    Inventor: Steven Joseph Hand
  • Patent number: 11901955
    Abstract: A switching network for effecting point-to-point communication between nodes has a time-varying switching configuration, which causes successive activation and deactivation of multiple channels of the switching network, a first of the channels connecting, when activated, a transmitter node and a first receiver node, and a second of the channels connecting, when activated, the transmitter node and a second receiver node.
    Type: Grant
    Filed: September 16, 2020
    Date of Patent: February 13, 2024
    Assignee: Microsoft Technology Licensing, LLC.
    Inventors: Kai Shi, Paolo Costa, Hitesh Ballani, Istvan Haller, Daniel Jonathan Finchley Cletheroe, Sophie Gloria Lange, Raphael Eric Alfred Behrendt, Foteini Karinou, Krzysztof Jozwik
  • Patent number: 11888580
    Abstract: The present invention relates to a communication system for receiving electromagnetic radiation (EMR) signals from a plurality of sources or directions. A communication system comprises a transmission section surrounding an antenna section. The transmission section can be made of concentric layers of lens elements, mirror elements, or refraction medium. The layers allow incoming EMR to be directed to the antenna section through reflection or refraction. The antenna section can be made of a plurality of antenna elements such that each antenna element detects incoming EMR signals from different angles of origin even when the signals are received simultaneously.
    Type: Grant
    Filed: March 28, 2022
    Date of Patent: January 30, 2024
    Assignee: United States of America as represented by the Secretary of the Navy
    Inventor: Ryan A Bell
  • Patent number: 11888583
    Abstract: Aspects of the present disclosure describe systems, methods. and structures directed to an integrated 3-way branching unit switch module suitable for undersea application.
    Type: Grant
    Filed: December 6, 2021
    Date of Patent: January 30, 2024
    Assignee: NEC Corporation
    Inventors: Fatih Yaman, Shinsuke Fujisawa, Hussam Batshon, Takigawa Yoshinari, Ryuji Aida, Takanori Inoue, Eduardo Rodriguez, Yoshihisa Inada
  • Patent number: 11888534
    Abstract: Power sourcing equipment of a power-over-fiber system includes a first laser, a second laser, and a light input/output part. The first laser oscillates with electric power to output feed light. The second laser oscillates with electric power to output feed light. The light input/output part inputs first feed light output by the first laser and second feed light output by the second laser to a single channel of an optical fiber. A light intensity distribution of the first feed light at an output end face of the channel differs from a light intensity distribution of the second feed light at the output end face of the channel. The first feed light and the second feed light are simultaneously input to the channel to reduce non-uniformity of a light intensity distribution at the output end face. Further, incident angles ?1 and ?2 are different from each other to reduce the non-uniformity of the light intensity distribution at the output end face.
    Type: Grant
    Filed: December 22, 2020
    Date of Patent: January 30, 2024
    Assignee: KYOCERA CORPORATION
    Inventor: Tomonori Sugime
  • Patent number: 11888525
    Abstract: A full duplex communication network includes an optical transmitter end having a first coherent optics transceiver, an optical receiver end having a second coherent optics transceiver, and an optical transport medium operably coupling the first coherent optics transceiver to the second coherent optics transceiver. The first coherent optics transceiver is configured to simultaneously transmit a downstream optical signal and receive an upstream optical signal. The second coherent optics transceiver is configured to simultaneously receive the downstream optical signal from the first coherent optics transceiver and transmit the upstream optical signal first coherent optics transceiver. At least one of the downstream optical signal and the upstream optical signal includes at least one coherent optical carrier and at least one non-coherent optical carrier.
    Type: Grant
    Filed: February 8, 2021
    Date of Patent: January 30, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Zhensheng Jia, Luis Alberto Campos, Jing Wang, Mu Xu, Haipeng Zhang, Curtis Dean Knittle
  • Patent number: 11881899
    Abstract: A receiver is provided for processing an input signal from a communication network. The receiver includes a processor and a memory configured to store computer executable instructions, which, when executed by the processor, cause the processor to (i) receive an input data signal including digital bit information, (ii) code the input data signal into a plurality of multi-level symbols, (iii) map the plurality of multi-level symbols into a plurality of constellation points in the phase domain, (iv) execute a first phase recovery subprocess on the plurality of constellation points to recover a first carrier phase of the input signal, (v) implement a Gaussian mixture model (GMM) on the recovered first carrier phase to generate an enhanced recovered carrier phase, and (vi) process the enhanced recovered carrier phase with a second phase recovery subprocess to reduce distortion from the input signal.
    Type: Grant
    Filed: May 27, 2022
    Date of Patent: January 23, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Haipeng Zhang, Mu Xu, Zhensheng Jia, Luis Alberto Campos