Patents Examined by Kenneth N Vanderpuye
  • Patent number: 10374700
    Abstract: An integrating sphere-equipped optical measurement device and optical connector polarity and type identification and loss measurement are provided. The optical measurement device receives one or more optical signals that respectively emanate from one or more optical fibers of a plurality of optical fibers of an optical fiber cable. The optical measurement device determines one or more respective positions where the one or more optical signals impinged on a sensor. The optical measurement device determines based on the one or more positions, one or more receiving positions of the one or more optical signals, respectively. The optical measurement device determines a polarity of the optical fiber cable based on both the one or more receiving positions and one or more or transmitting positions of the one or more optical signals, respectively.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: August 6, 2019
    Assignee: Fluke Corporation
    Inventors: J. David Schell, Seymour Goldstein, Piotr Anatolij Levin
  • Patent number: 10367596
    Abstract: A multiple wavelength selective switch has an optics assembly to receive a first input optical signal from a first ingress port and a second input optical signal from a second ingress port. A switch assembly has a single switching mechanism to direct the first input optical signal to the optics assembly as a first output optical signal and the second input optical signal to the optics assembly as a second output optical signal. The switch assembly directs the first output optical signal to a first egress port selected from the first set of egress ports and directs the second output optical signal to a second egress port selected from the second set egress ports. The first egress port and the second egress port have the same wavelength channel. The multiple wavelength selective switch supports an arbitrary number of wavelength channels that can be switched at the same time. Each switch assembly directs signals from a set of ingress ports to a set of egress ports sharing the same wavelength channel.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: July 30, 2019
    Assignee: II-VI Delaware, Inc.
    Inventors: Oliver Lu, Helen Chen, Gordon Jiang, Simon He, Lawrence Wang, Tom Li, Jim Yuan, Jack Kelly, Fenghua Li
  • Patent number: 10362375
    Abstract: In one example in accordance with the present disclosure, a system is provided. The system includes a first subsystem and a second subsystem, connectable to each other via a passive cable, and each connected to a high-level management tool. Each subsystem includes a signal driver/receiver capable of sending and receiving data and signals over the passive cable and a connection discovery engine to access low-level power up/down controls of the signal driver/receiver. The connection discovery engine is to, via physical layer communication, send a local unique identifier (ID) of the particular signal driver/receiver over the passive cable. The connection discovery engine is further to, via physical layer communication, receive, over the passive cable, a remote unique ID of the signal driver/receiver in the other connected subsystem. The connection discovery engine is further to send the local unique ID and the remote unique ID to the high-level management tool.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: July 23, 2019
    Assignee: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP
    Inventors: Alan L. Goodrum, Montgomery C. McGraw, Kuang-Yi Wu
  • Patent number: 10361779
    Abstract: In the optical transmission system to transmit optical signals using a plurality of adjacent paths, it is difficult to detect a delay difference between a plurality of paths and chromatic dispersion with a high degree of accuracy due to a crosstalk; therefore, a method for detecting optical signal information according to an exemplary aspect of the present invention includes generating a plurality of data signal sequences corresponding to a plurality of paths multiplexed spatially, each of the plurality of data signal sequences obtained by inserting periodically a training signal with a plurality of frequency components in a data signal, in the plurality of data signal sequences, the training signals respectively included in the data signal sequences to be propagated through adjacent paths at least having different frequency components from each other at the same timing, each of a plurality of the training signals included in one of the data signal sequences having the plurality of frequency components whose
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: July 23, 2019
    Assignee: NEC CORPORATION
    Inventors: Manabu Arikawa, Emmanuel Le Taillandier De Gabory, Toshiharu Ito
  • Patent number: 10361781
    Abstract: A system for digital aggregation of upstream traffic in a network includes optical nodes coupled to a customer distribution network. Dedicated optical fiber spans are coupled to the optical nodes, where each optical node is assigned a dedicated optical fiber span. An upstream aggregator is coupled to each of dedicated optical fiber spans. The upstream aggregator receives digital data from each optical node over each dedicated optical fiber spans assigned to the optical nodes, aggregates the digital data received from each optical node, and outputs the aggregated digital data. The system further includes a digital receiver coupled to the upstream aggregator. The digital receiver receives the aggregated digital data from the upstream aggregator, processes the aggregated digital data; and outputs the processed aggregated digital data to the network.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: July 23, 2019
    Assignee: SEALIGHT TECHNOLOGIES, INC.
    Inventor: Moshe Frozenfar
  • Patent number: 10355786
    Abstract: In order to provide an optical modulator capable of controlling a bias voltage to correspond to transmission characteristics of a modulation means even when a multi-level modulation scheme is applied, an optical modulator 10 is provided with: an amplitude information control means 20that generates amplitude information for controlling the amplitude of an information signal to correspond to transmission characteristics of a modulation means 50, adds a dither signal to the amplitude information, and outputs the amplitude information; a bias value control means 30 that generates and outputs a bias value for controlling the center of the amplitude of the information signal to correspond to the transmission characteristics of the modulation means 50; a data output means 40 that corrects the amplitude of information data on the basis of the amplitude information, and outputs the information data as the information signal; the modulation means 50 that corrects the center of the amplitude of the information signal on
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: July 16, 2019
    Assignee: NEC CORPORATION
    Inventor: Tadashi Koga
  • Patent number: 10348441
    Abstract: A method and apparatus for communications in a passive optical network (PON) system are provided. An optical line terminal (OLT) generates a PON downstream Physical Layer (PHY) frame comprising a downstream physical synchronization block (PSBd) that comprises a wavelength identification (ID) of at least one downstream wavelength of the plurality of downstream wavelengths. The OLT sends the PON PHY frame comprising the wavelength ID in the PSBd to ONU for confirming the at least one downstream wavelength.
    Type: Grant
    Filed: July 2, 2018
    Date of Patent: July 9, 2019
    Assignee: Futurewei Technologies, Inc.
    Inventors: Yuanqiu Luo, Frank J. Effenberger
  • Patent number: 10341015
    Abstract: Described herein are various technologies pertaining to detecting tampering of a seal based upon quantum optical communication via a communications channel comprising the seal. A plurality of pulses of light encoded with random data are transmitted on the communications channel, whereupon they are received and their data values measured. The measured data values of the pulses are then compared to the known transmitted data to determine a correlation statistic between the transmitted and received data values. Tampering with the seal can be detected based upon identifying that the correlation statistic has dropped below a threshold non-tampered level of correlation between transmitted and received values.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: July 2, 2019
    Assignee: National Technology & Engineering Solutions of Sandia, LLC
    Inventors: Mohan Sarovar, David Farley, Daniel B. S. Soh, Ryan Camacho, Constantin Brif
  • Patent number: 10341028
    Abstract: A method for transmitting and receiving a radio frequency (RF) signal over an optical channel is described, where a nonlinear optical harmonic generation device is used to increase the system performance. The RF signal is phase modulated onto an optical carrier. The received optical carrier propagates through a nonlinear optical harmonic generation device, which increases a phase modulation depth at the harmonic wavelength. This larger modulation depth can be used to achieve larger gain. By photo-detecting both the fundamental and the harmonic optical wavelengths, then properly scaling and subtracting the two photo-detected signals, the enhanced modulation depth at the harmonic optical wavelength can be used to cancel out unwanted nonlinear distortions thereby linearizing the measured RF signal.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: July 2, 2019
    Assignee: Nucript LLC
    Inventor: Gregory S. Kanter
  • Patent number: 10333629
    Abstract: An apparatus is described which uses directly modulated InGaN Light-Emitting Diodes (LEDs) or InGaN lasers as the transmitters for an underwater data-communication device. The receiver uses automatic gain control to facilitate performance of the apparatus over a wide-range of distances and water turbidities.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: June 25, 2019
    Assignee: Magseis FF LLC
    Inventor: Philip Lacovara
  • Patent number: 10326561
    Abstract: An optical rotary joint communication apparatus for communicating between a rotor and a stator. Optical sources and detectors are arranged on both the rotor and the stator to provide bi-directional communication. As the rotor rotates, downlink detectors on the rotor sequentially communicate via line-of-sight optical channels with corresponding downlink receivers on the stator. Each downlink receiver is provided a curved mirror reflecting the downlink beam onto the downlink receiver when the rotation angle of the rotor is within a corresponding angle interval. When the rotation angle moves past the angle interval, the downlink beams transition to another mirror and another downlink receiver. The downlink beams are directed predominantly tangential to the rotor circumference.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: June 18, 2019
    Assignee: Toshiba Medical Systems Corporation
    Inventors: Marek Dudek, Ognian Ivanov
  • Patent number: 10326531
    Abstract: An out-of-band (OOB) signal detector is disclosed. The OOB signal detector may include a first node configured to receive an alternating current (AC) portion and a direct current (DC) portion of an electrical signal. The AC portion may include modulated OOB data carried by the electrical signal. The OOB signal detector may also include a current to voltage processing circuit configured to extract the AC portion of the electrical signal. The OOB signal detector may additionally include a limiting amplifier circuit configured to receive the extracted AC portion and to generate an amplified signal based on the extracted AC portion. The OOB signal detector may further include an analog-to-digital convertor circuit configured to sample the amplified signal and to generate a digital sample that represents the modulated OOB data.
    Type: Grant
    Filed: September 18, 2018
    Date of Patent: June 18, 2019
    Assignee: FINISAR CORPORATION
    Inventors: Andrew Zocher, Theron Jones, Lucy Hosking
  • Patent number: 10326528
    Abstract: There is provided an optical transceiver including a laser light source configured to transmit a first optical signal via an optical transmission member having optical fibers, a photodetector configured to receive a second optical signal via the optical transmission member, a visible light source configured to emit visible light which is incident to the optical transmission member, and a control circuit configured to, when the photodetector detects not to receive the second optical signal, control the laser light source to stop transmitting the first optical signal and the visible light source to start emitting the visible light.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: June 18, 2019
    Assignee: FUJITSU LIMITED
    Inventor: Mariko Kase
  • Patent number: 10320481
    Abstract: Described herein are ground based subsystems, and related methods, for use in transmitting an optical feeder uplink beam to a satellite that is configured to receive the optical feeder uplink beam and in dependence thereon produce and transmit a plurality of RF service downlink beams within a specified RF frequency range to service terminals. Certain embodiments are related to a resource allocator for inclusion in a ground based subsystem, and methods for use therewith. Beneficially, the resource allocator, and methods for use therewith, eliminate any need for a satellite to perform any bandwidth allocation for the plurality of service downlink beams produced and transmitted by the satellite, thereby eliminating any need for the satellite to include an on-board channelizer. Such a recourse allocator can include a plurality of channels each of which can include an encoder and modulator, a channel filter, and a frequency up-converter.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: June 11, 2019
    Assignee: Space Systems/Loral, LLC
    Inventors: Leah Wang, Vijaya Gallagher, Ghislain Turgeon
  • Patent number: 10313010
    Abstract: Systems, methods, and apparatus for laser communications in super-geosynchronous Earth orbit are disclosed. In one or more embodiments, the disclosed method involves transmitting, by at least one laser on at least one first satellite, at least one first transmit signal. The method further involves receiving, by at least one detector on at least one first satellite, at least one first receive signal. In one or more embodiments, at least one first satellite is in super-geosynchronous Earth orbit (S-GEO). In at least one embodiment, at least one first transmit signal and at least one first receive signal are laser signals and have a field of regard covering one hemisphere of the Earth.
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: June 4, 2019
    Assignee: The Boeing Company
    Inventors: Matthew M. Everett, John P. Leuer, David A. Whelan, Stephen G. Lambert
  • Patent number: 10302529
    Abstract: An integrating sphere-equipped optical measurement device and optical connector polarity and type identification and loss measurement are provided. The optical measurement device includes at least two photodetectors that are optically responsive over different ranges of wavelengths. The optical measurement device receives one or more optical signals emanate from optical fibers of an optical fiber cable. The optical measurement device determines an optical intensity or loss of the one or more optical signals based on a measurement made by a corresponding photodetector whose responsivity range includes a wavelength of the one or more optical signals. The optical measurement device determines one or more respective positions where the one or more optical signals impinged on a sensor. The optical measurement device determines a polarity of the optical fiber cable based on both the one or more positions and one or more or transmitting positions of the one or more optical signals, respectively.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: May 28, 2019
    Assignee: Fluke Corporation
    Inventors: J. David Schell, Seymour Goldstein, Piotr Anatolij Levin
  • Patent number: 10299019
    Abstract: A communication method includes combining first and second optical signals into a third optical signal, processing the third optical signal, and separating the third optical signal back into the first and second optical signals. The method includes sending the first optical signal out a first system port, sending the second optical signal out a second system port, receiving a fourth optical signal in the first system port, and receiving a fifth optical signal in the second system port. The method also includes combining the fourth and fifth optical signals into a sixth optical signal, processing the sixth optical signal, and separating the sixth optical signal back into the fourth and fifth optical signals.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: May 21, 2019
    Assignee: X DEVELOPMENT LLC
    Inventors: Chiachi Wang, Romain Clement
  • Patent number: 10291328
    Abstract: An optical modulator combines and inputs a signal light propagating through the optical network and a control light having information concerning the optical network to a nonlinear optical medium. The optical modulator modulates the signal light according to changes in intensity of the control light, in the nonlinear optical medium.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: May 14, 2019
    Assignee: FUJITSU LIMITED
    Inventor: Shigeki Watanabe
  • Patent number: 10289213
    Abstract: The invention is directed at a remote control device for controlling one or more user devices, comprising a directional optical sensor for receiving one or more optical signals from the user devices and for detecting an incoming direction of said received optical signals, and a processor. For identification of at least one of said user devices, the processor is arranged for analyzing at least one of said received optical signals for associating thereof with the at least one of said user devices and for keeping track of the at least one of said optical signals upon changing of said incoming direction. The one or more optical signals comprise high and low signal states, wherein each optical signal consists of one or more signal fragments.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: May 14, 2019
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Hendricus Theodorus Gerardus Maria Penning De Vries, Henk Kok, Johannes Yzebrand Tichelaar
  • Patent number: 10284931
    Abstract: Embodiments of the present invention provide a liquid crystal grating-based optical switching apparatus, including an input collimator, an input polarization beam splitter, an input quarter-wave plate, a liquid crystal grating, an output quarter-wave plate, an output polarization beam splitter, and an output collimator. A transmission path is selected for an optical signal by changing a voltage of a liquid crystal grating so that the optical signal is output to a selected output.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: May 7, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Chongchang Mao, Minchun Li, Sichao Wang