Patents Examined by Leslie C Pascal
  • Patent number: 10498460
    Abstract: Described are various configurations for an amplifying optical demultiplexer. Various embodiments can receive an input signal comprising multiple sub-signals, and separate and amplify the signals within the demultiplexer. Some embodiments include a multistage demultiplexer with amplifiers located between a first and second stage. Some embodiments include a multistage demultiplexer with amplifiers located between a second and third stage.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: December 3, 2019
    Assignee: Juniper Networks, Inc.
    Inventors: Naser Dalvand, Erik Johan Norberg, Brian Robert Koch
  • Patent number: 10491323
    Abstract: A data transmission control method, passive optical network (PON) equipment and apparatus, and a PON are presented. The method includes obtaining, by first PON equipment, data transmission information between the first PON equipment and second PON equipment; determining a target line rate between the first PON equipment and the second PON equipment according to the data transmission information; and transmitting data on a line between the first PON equipment and the second PON equipment according to the target line rate. The equipment includes an obtaining unit, a determining unit, and a communications unit. In the embodiments of the present disclosure, energy consumption of an optical network unit (ONU) can be reduced when service traffic of the ONU is light.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: November 26, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Bo Gao
  • Patent number: 10491293
    Abstract: According to embodiments of the present disclosure, apparatus is provided for protecting an optical link arranged to carry upstream optical signals and downstream optical signals. The apparatus comprises a first detector arranged to selectively detect a downstream optical signal received at a second port having a first wavelength and a second detector arranged to selectively detect a downstream optical signal received at the second port having a second wavelength different from the first wavelength. The apparatus further comprises control circuitry arranged to cause a protection switch to selectively couple a third port to the second port instead of to the first port based on the detecting by the first detector and the second detector. Also provided is a second apparatus for protecting the optical link.
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: November 26, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Roberto Magri, Alberto Deho, Fabio Falconi
  • Patent number: 10484093
    Abstract: Feeding a plurality of antenna elements of an array antenna, involves receiving at a photonic substrate at least one transmit modulated optical carrier (TMOC) signal. The TMOC signal is communicated to an array level photonic integrated circuit (ALPIC) disposed on the photonic substrate where one or more optical processing operations are performed involving the TMOC signal to obtain a plurality of element-level optical carrier (ELOC) signals. These ELOC signals are communicated from the ALPIC to a plurality of conversion locations distributed on the photonic substrate. Photodetectors respectively provided at the conversion locations convert each of the ELOC signals to an element-level modulated radio frequency (ELMRF) signal. The ELMRF signal are coupled from each photodetector respectively to one of the plurality of antenna elements.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: November 19, 2019
    Assignee: Precision Optical Transceivers Inc.
    Inventors: David M. Calhoun, Barrett Bartell
  • Patent number: 10473862
    Abstract: A steerable optical transmit and receive terminal includes a MEMS-based N×1 optical switch network. Each optical switch in the optical switch network uses an electrostatic MEMS structure to selectively position a translatable optical grating close to or far from an optical waveguide. In the close (“ON”) position, light couples between the translatable optical grating and the optical waveguide, whereas in the far (“OFF”) position, no appreciable light couples between the translatable optical grating and the optical waveguide. The translatable optical grating is disposed at or near a surface of the optical switch network. Thus, the translatable optical grating emits light into, or receives light from, free space. The steerable optical transmit and receive terminal also includes a lens and can steer a free space optical beam in a direction determined by which port of the N×1 optical switch network is ON.
    Type: Grant
    Filed: December 16, 2017
    Date of Patent: November 12, 2019
    Assignee: The Charles Stark Draper Laboratory, Inc.
    Inventors: Steven J. Spector, Michael G. Moebius, Benjamin F. Lane, Gregg E. Favalora
  • Patent number: 10461859
    Abstract: A method of outputting color code for data communication to a display screen, the method includes determining a plurality of sections having a predetermined order of a display screen, mapping the plurality of sections to different binary numbers each having at least one-bit length, and outputting a predetermined color to consecutive sections including at least a first section among the plurality of sections in a direction of the predetermined order or a reverse direction of the predetermined order. The color output to the consecutive sections represents binary numbers in which ‘0’ or ‘1’ is added to a front or end of designated binary numbers in the direction of the predetermined order or the reverse direction of the predetermined order, the designated binary numbers mapped to a last section among the consecutive sections in the direction of the predetermined order or the reverse direction of the predetermined order.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: October 29, 2019
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Kwang-Seok Hong, Byung Hun Oh
  • Patent number: 10454238
    Abstract: Low phase noise radio frequency (RF) sources generated by voltage controlled oscillators (VCOs) are described. Optical modulators driven by a VCO may be used to generate optical side-bands to cw lasers. The spectral extent of said side-bands can be increased via frequency broadening in highly nonlinear waveguides. Free running mode locked low phase noise comb oscillators can be used as reference oscillators to generate beat signals between those side-bands and individual comb modes at distal spectral regions, thereby creating an error signal used to reduce the phase noise of VCOs and the generation of low phase noise RF signals. VCO phase noise may be reduced by using free-running modelocked comb lasers phase locked to external frequency references, by omitting a reference comb and using a nonlinear interferometer for generating an error signal, or by locking a slave comb to the modulation frequency of an intra-cavity modulator driven by the VCO.
    Type: Grant
    Filed: October 5, 2017
    Date of Patent: October 22, 2019
    Assignee: IMRA America, Inc.
    Inventors: Martin E. Fermann, Naoya Kuse
  • Patent number: 10451805
    Abstract: The present invention provides a wavelength division multiplexing/demultiplexing optical transceiving assembly based on a diffraction grating, which is an uplink optical emitting unit and a downlink optical receiving unit that comprise a laser chip array, a light receiving detector array, a first fast axis collimating lens, a second fast axis collimating lens, a first slow axis collimating lens, a diffraction grating, a slow axis focusing lens, a second slow axis collimating lens, an optical isolator, a coupling output lens, a coupling input lens, a coupling outputting optical fiber and a coupling inputting optical fiber.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: October 22, 2019
    Assignee: WUHAN TELECOMMUNICATION DEVICES CO., LTD
    Inventors: Xuesheng Tang, Di Zhang, Shenglei Hu, Yongan Fu, Yanfeng Fu, Chenggang Liu, Shiyu Li, Liping Sun, Weidong Ma
  • Patent number: 10452120
    Abstract: [Object] To provide a communication device, an information processing device, and a communication method. [Solution] A communication device including: a detector configured to detect an optical signal and convert the optical signal to an electric signal; a data processing unit configured to process the electric signal converted by the detector to acquire data; and a controller configured to control an operating state including a standby state in which the data processing unit is deactivated to reduce power consumption and an active state in which the data processing unit is capable of executing acquisition of the data on a basis of the optical signal detected by the detector, in which the detector detects the optical signal in the standby state.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: October 22, 2019
    Assignee: SONY CORPORATION
    Inventors: Ryohei Takahashi, Kazuaki Toba, Toshihisa Hyakudai, Hiroshi Morita
  • Patent number: 10455302
    Abstract: The disclosure provides a method and apparatus for adjusting wavelength for an Optical Line Terminal/Optical Network Unit (OLT/ONU). The method for adjusting wavelength for an OLT includes that: a source OLT sends an adjustment notification message to a target OLT, wherein the adjustment notification message is used for indicating that an ONU is to be adjusted into a Time-Wavelength Division Multiplexing Channel (TWDM CH) of the target OLT; and the source OLT receives an adjustment acknowledgement message provided by the target OLT, wherein the adjustment acknowledgement message is used for indicating that an adjustment process of the ONU has been completed. By means of the technical solution provided in the disclosure, an ONU of a source OLT can still work normally after being switched to a channel of a target OLT, thereby achieving the effect that the continuity of a service between the OLT and the ONU may be maintained.
    Type: Grant
    Filed: July 23, 2014
    Date of Patent: October 22, 2019
    Assignee: XI'AN ZHONGXING NEW SOFTWARE CO., LTD.
    Inventors: Dezhi Zhang, Liquan Yuan, Weiliang Zhang, Dan Geng
  • Patent number: 10454581
    Abstract: The techniques described herein may be used to deploy a digital kiosk, within a fiber optic network, in a manner that is efficient and that minimizes the risk of damaging the kiosk during the installation process. This may include manufacturing the kiosk with a Fiber Distributed Panel (FDP) that functions as an interface between a fiber optic stub (that connects the kiosk to a fiber optic network backbone) and individual, internal components of the kiosk. A technician therefore may install the kiosk without having to physically open the kiosk and/or configure the fiber cabling and internal components inside the kiosk.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: October 22, 2019
    Assignee: Verizon Patent and Licensing Inc.
    Inventors: Jesse C. Saenz, Dennis Macy
  • Patent number: 10447421
    Abstract: The present disclosure provides a fronthaul control device which can adjust a center wavelength of an optical signal to changeably control allocation of an optical wavelength band; an operating method of the fronthaul control device; a program for controlling allocation of an optical wavelength band; and a computer-readable recording medium in which the program is recorded.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: October 15, 2019
    Assignee: SK TELECOM CO., LTD.
    Inventors: Chang Soon Choi, Min Soo Na
  • Patent number: 10425345
    Abstract: In some embodiments, an apparatus comprises an optical transponder which includes a processor, an electrical interface and an optical interface. The processor is operatively coupled to the electrical interface and the optical interface. The optical interface is configured to be operatively coupled to a plurality of optical links and the electrical interface is configured to be operatively coupled to a router such that the optical transponder is configured to be operatively coupled between the plurality of optical links and the router. The processor is configured to perform pre-forward error correction (FEC) bit error rate (BER) detection to identify a degradation of an optical link from the plurality of optical links. The processor is configured to make modifications to packets designated to be transmitted via the optical link in response to the degradation being identified such that the router is notified of the degradation of the optical link.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: September 24, 2019
    Assignee: Juniper Networks, Inc.
    Inventors: Ajay Kachrani, Manish Talwar, Elmer Tolentino, Rathi Kartheek, Hao Wang
  • Patent number: 10411807
    Abstract: An optical data transmitter in which surface-coupled reflective electro-absorption modulators are placed into different interferometer arms and operated in a manner that enables the optical data transmitter to transmit an optical output signal modulated using PAM, QPSK, or QAM modulation. In some embodiments, the optical data transmitter is configured to generate a PDM optical output signal by using two such interferometers and a quarter-wavelength plate configured to cause the output polarizations of the two interferometers to be mutually orthogonal. The electro-absorption modulators are surface-coupled in the sense that, in operation, each of these devices receives input light and outputs modulated light along a direction that is substantially orthogonal to the main plane of the device.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: September 10, 2019
    Assignee: NOKIA SOLUTIONS AND NETWORKS OY
    Inventors: Mark P. Earnshaw, Stefano Grillanda
  • Patent number: 10411809
    Abstract: Disclosed systems, methods, and computer program products enable high symbol-rate optical Nyquist signal generation with roll-off factors approaching zero by combining digital and all-optical methods. The combined digital and all-optical methods utilize all-optical sine-shaped pulse generation and orthogonal time-division multiplexing with quadrature amplitude modulation using digital Nyquist signals. Disclosed embodiments exhibit inter-channel-interference penalties that are less than 0.5-dB for both 75-GBaud and 125-GBaud optical Nyquist signals, in contrast to conventional signals generated using rectangular waveform driving signals that exhibit penalties greater than 2.5-dB and 1.5-dB for 75-GBaud and 125-GBaud signals, respectively. The disclosed embodiments, therefore, enable significant improvement over conventional systems by reducing inter-channel-interference penalties caused by excess modulation induced bandwidth.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: September 10, 2019
    Assignee: ZTE (USA) Inc.
    Inventors: Jianjun Yu, Junwen Zhang
  • Patent number: 10404403
    Abstract: Free-space communication systems and methods are provided. The systems include a transmitter that combines multiple sets of radio-frequency-modulated optical carrier frequencies for transmission across free space using multiple transmission apertures. Different sets of signals are filtered to form single sideband signals. The different sets of single sideband signals are then combined to form dense wavelength division multiplexed signals. In addition, combined sets of signals of different polarizations can be combined. A receiver can include a single receive aperture.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: September 3, 2019
    Assignee: Ball Aerospace & Technologies Corp.
    Inventors: John R. Troeltzsch, Colin H. Wilson, Robert M. Pierce, Holden Chase, Brian Primeau, Robert Kaliski, Bevan D. Staple, Robert Marshalek
  • Patent number: 10390115
    Abstract: There is provided an optical switch. The optical switch comprises a first optical waveguide, a second optical waveguide, a first optical ring resonator and a second optical ring resonator. The first optical ring resonator is arranged between the first optical waveguide and the second optical waveguide, wherein the first optical ring resonator is capable of coupling an optical signal travelling along the first optical waveguide in a first direction to the second optical waveguide such that the optical signal travels in a second direction along the second optical waveguide. The second optical ring resonator is arranged between the first optical waveguide and the second optical waveguide; wherein the second optical ring resonator is capable of coupling an optical signal travelling along the first optical waveguide in the first direction to the second optical waveguide such that the optical signal travels in a third direction along the second optical waveguide opposite to the second direction.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: August 20, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Francesco Testa, Alberto Bianchi, Marco Romagnoli, Vito Sorianello, Philippe Velha
  • Patent number: 10389441
    Abstract: There is provided an optical signal monitoring device and an optical signal monitoring system of a wavelength division multiplexing based network including: an input unit configured to receive each of downlink signals and uplink signals; a wavelength division multiplexing filter configured to separate the downlink signals and the uplink signals by wavelength; an optical power measurement module configured to measure optical power of each signal separated by wavelength; and a controller configured to determine whether an optical signal is abnormal based on optical power information measured by the optical power measurement module.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: August 20, 2019
    Assignee: SOLiD, INC.
    Inventor: Chiyoung Park
  • Patent number: 10382158
    Abstract: An optical transmission system comprises at least one first connection point and one second connection point arranged to transmit and receive at least one channel signal transmitted via at least one optical means connecting the first connection point and the second connection, wherein each of the at least one channel signal is reversibly configurable to be transmitted in either a first direction or a second direction between the first connection point and the second connection point. A method of transmitting at least one channel signal between a first connection point and a second connection point via at least one optical media in an optical transmission system, wherein each of the at least one channel signal is reversibly configurable to be transmitted in either a first direction or a second direction between the first and the second connection points.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: August 13, 2019
    Assignees: The Hong Kong Polytechnic University, Versitech Limited
    Inventors: Chun-yin Li, Ping-Kong Alexander Wai, Victor On-Kwok Li
  • Patent number: 10374750
    Abstract: An optical module processes first FEC (Forward Error Correction) encoded data produced by a first FEC encoder. The optical module has a second FEC encoder for further coding a subset of the first FEC encoded data to produce second FEC encoded data. The optical module also has an optical modulator for modulating, based on a combination of the second FEC encoded data and a remaining portion of the first FEC encoded data that is not further coded, an optical signal for transmission over an optical channel. The second FEC encoder is an encoder for an FEC code that has a bit-level trellis representation with a number of states in any section of the bit-level trellis representation being less than or equal to 64 states. In this manner, the second FEC encoder has relatively low complexity (e.g. relatively low transistor count) that can reduce power consumption for the optical module.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: August 6, 2019
    Assignee: INPHI CORPORATION
    Inventors: Benjamin P. Smith, Arash Farhoodfar