Patents Examined by Ken N Vanderpuye
  • Patent number: 10210750
    Abstract: A system, remote control device and method are provided herein for communicating with and controlling various devices using visible light communication (VLC). According to one embodiment, a method is provided for extending a communication range of a visible light communication system comprising a remote control device and a plurality of controlled devices. Such a method may include, for example, transmitting a communication message from a remote control device to a first controlled device located within range of the remote control device, wherein the communication message is transmitted through free space using visible light, and extending the communication range of the visible light communication system to a second controlled device, which is located outside of the range of the remote control device, by using the first controlled device to retransmit the communication message through free space using visible light to the second controlled device.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: February 19, 2019
    Assignee: Lutron Electronics Co., Inc.
    Inventors: David J. Knapp, Horace C. Ho
  • Patent number: 10171200
    Abstract: An optical transmitter multiplexes multiple optical channels for transmission over an optical communication medium. The spectrum of modulated signal in each optical channel is lowpass filtered in the electrical (digital) domain at half the channel baud rate such that super Nyquist signal multiplexing can be achieved in the optical domain without having to perform optical filtering. An optical coupler may be used to multiplex the multiple optical channels.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: January 1, 2019
    Assignee: ZTE Corporation
    Inventors: Jianjun Yu, Junwen Zhang
  • Patent number: 10171171
    Abstract: Methods and systems for selectable parallel optical fiber and WDM operation may include an optoelectronic transceiver integrated in a silicon photonics die. The optoelectronic transceiver may, in a first communication mode, communicate continuous wave (CW) optical signals from an optical source module to a first subset of optical couplers on the die for processing signals in optical modulators in accordance with a first communications protocol, and in a second communication mode, communicate the CW optical signals to a second subset of optical couplers for processing signals in the optical modulators in accordance with a second communications protocol. Processed signals may be transmitted out of the die utilizing a third subset of the optical couplers. First or second protocol optical signals may be received from the fiber interface coupled to a fourth subset or a fifth subset, respectively, of the optical couplers.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: January 1, 2019
    Assignee: Luxtera, Inc.
    Inventors: Greg Young, Peter DeDobbelaere
  • Patent number: 10165341
    Abstract: The invention discloses a method, in an OLT in a passive optical network, of identifying a long-shining rogue ONU, the method comprising the steps of: A. allocating a specific radio frequency signal at a different frequency to each of ONUs in the passive optical network; and B. when the long-shining rogue ONU is detected in the passive optical network: b1. broadcasting a control message to each of the ONUs; b2. receiving uplink signals in the uplink; b3. recovering the specific radio frequency signals transmitted by the normal ONUs from the uplink signals; and b4. identifying an absent specific radio frequency signal according to the recovered specific radio frequency signals, wherein the ONU corresponding to the absent specific radio frequency signal is the long-shining rogue ONU. The invention further discloses an OLT device performing the method and a method, in an ONU, of assisting the OLT in identifying a long-shining rogue ONU.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: December 25, 2018
    Assignee: Alcatel Lucent
    Inventor: Qingjiang Chang
  • Patent number: 10165390
    Abstract: According to one system, the system includes a chassis defining an enclosure and containing one or more slots. The system further includes a radio frequency identification (RFID) reader module comprising at least one processor and one or more RFID readers located within the enclosure, wherein the one or more RFID readers are configured to read data stored in RFID tags associated with one or more unpowered network taps. The RFID reader module is configured to receive, from a first RFID reader associated with a first slot of the chassis, information regarding a first unpowered network tap in the first slot, to determine, using a known location of the first RFID reader, a slot identifier associated with the first unpowered network tap, wherein the slot identifier indicates that the first unpowered network tap is in the first slot, and to provide the information and the slot identifier to a management system.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: December 25, 2018
    Assignee: KEYSIGHT TECHNOLOGIES SINGAPORE (HOLDLNGS) PTE. LTD.
    Inventors: Marcel Felix Desdier, Larry Allan Campbell, Siuman Hui
  • Patent number: 10153861
    Abstract: A device may receive optical network information associated with a first optical node and a second optical node. The first optical node may be associated with a first group of optical devices. The second optical node may be associated with a second group of optical devices. The device may identify a first mapping in which a first group of optical channels is associated with the first group of optical devices and a second mapping in which a second group of optical channels is associated with the second group of optical devices. The first group of optical channels may correspond to the first group of payloads, and the second group of optical channels may correspond to the second group of payloads. The device may provide information depicting the first mapping and information depicting the second mapping.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: December 11, 2018
    Assignee: Infinera Corporation
    Inventors: Karthikeyan Mathruboodham Nagarajan, Ravindarreddy Ankireddy, Kasi Viswanadham Pydi, Yashpal Kumar, Musab Qamri
  • Patent number: 10154322
    Abstract: An optical system is provided that converts optical signals received over an optical trunk from a first optical switch to client optical signals intended for a second optical switch. The first and second optical switches operate in accordance with a Fiber Channel (FC) protocol. An interruption of the optical signals on the optical trunk is detected. Responsive to the interruption, a Not Operational State (NOS) message sent to the second optical switch is delayed so as to delay triggering of an FC link initialization in the second optical switch. While the NOS message is delayed, idle messages are sent to the second optical switch.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: December 11, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Giovanni Tandi, Gilberto Loprieno
  • Patent number: 10153860
    Abstract: A method of loading a fiber optic transport system includes adding one or more control channels to an optical fiber having one or more channels, wherein each of the control channels comprises a pair of signals that are cross-polarized and each of the pair of signals is at a different frequency from one another; measuring optical power on the optical fiber; and adjusting optical power of the one or more control channels based on the measured optical power.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: December 11, 2018
    Assignee: Ciena Corporation
    Inventors: David Boertjes, Loren Berg
  • Patent number: 10148352
    Abstract: An apparatus for measuring a distance between a first and second terminal includes a frame counter for determining a number of data frames traversing a distance between the first terminal 105 and the second terminal, a frame bit counter for determining a number of data clock bits offset between a transmitted data frame and a concurrently received data frame, a data clock phase detector for determining a phase difference between an RF data clock for the transmitted data frame and an RF data clock for the concurrently received data frame, and an optical carrier phase detector for determining a phase difference between an optical carrier used to transmit the transmitted data frame and an optical carrier for the concurrently received data frame. The distance between the first and second terminal is determined from a round trip transit time T between the first and second terminals.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: December 4, 2018
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Guangning Yang, Jeffrey R. Chen
  • Patent number: 10142048
    Abstract: It is intended to suppress the deterioration of the transmission quality of an optical signal propagating through an optical fiber due to the intensity variation of a control signal. An exemplary aspect of the present invention includes outputting main signal light; generating a first optical signal by intensity-modulating an optical signal depending on a control signal; generating a second optical signal by intensity-modulating an optical signal depending on a differential component between a prescribed signal having a constant intensity and the control signal; outputting a wavelength-multiplexed optical signal by multiplexing the first optical signal being generated and the second optical signal being generated; and transmitting a transmitting signal by multiplexing the output main signal light being output and the wavelength-multiplexed optical signal being output.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: November 27, 2018
    Assignee: NEC Corporation
    Inventor: Takanori Inoue
  • Patent number: 10142029
    Abstract: Device for modulating the intensity of an optical signal on four levels, this device comprising: a first resonant ring modulator comprising an output port capable of delivering a first modulated optical signal, a second resonant ring modulator comprising an output port capable of delivering a second modulated optical signal, an optical assembler comprising: a first input optically coupled to the output port of the second resonant ring modulator, a second input optically coupled to the output port of the first resonant ring modulator, and an output capable of delivering the optical signal of which the intensity is modulated on four different levels constructed by combining the optical signals received on its first and second inputs.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: November 27, 2018
    Assignee: Commissariat A L'Energie Atomique et aux Energies Alternatives
    Inventors: Olivier Dubray, Benjamin Blampey, Sylvie Menezo
  • Patent number: 10135545
    Abstract: An optical receiver module includes a light receiving element that has a first electrode and a second electrode for receiving a bias and converts an optical signal inputted into an electrical signal to output the electrical signal via the first electrode. A signal line extends from the first electrode through the light receiving element-side signal pad and the second wire to the amplifier-side signal pad. A bias line extends from the second electrode through the light receiving element-side bias pad, the first wire, and the third wire to the first and second amplifier-side bias pads. The signal line three-dimensionally intersects with the bias line at an interval in a direction of the loop height of the first wire and that of the second wire.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: November 20, 2018
    Assignee: Oclaro Japan, Inc.
    Inventors: Takuma Ban, Kazuhiro Komatsu
  • Patent number: 10136199
    Abstract: The present application discloses example optical transmission apparatuses, where one example apparatus includes a filter, a router, and an optical multiplexer. The filter is connected to the router, and the router is connected to the optical multiplexer. The filter performs parity optical demultiplexing on 2N input optical signal groups by using 2N comb filters to obtain 2N odd optical signal groups and 2N even optical signal groups, and sends the 2N odd optical signal groups and the 2N even optical signal groups to the router. The router separately routes the 2N odd optical signal groups and the 2N even optical signal groups to the optical multiplexer by using at least four AWGRs. The optical multiplexer performs, by using 2N optical multiplexers, optical multiplexing on 4N optical signal groups output by the router to obtain 2N output optical signal groups.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: November 20, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Chendi Jiang
  • Patent number: 10129616
    Abstract: A radio frequency over glass (RFoG) system may be modified to extend a downstream band. A transimpedance amplifier with a downstream path may be used in the RFoG system in combination with an upstream path having greater than 200 MHz radio frequency (RF) bandwidth to provide the greater than 1.2 GHz downstream bandwidth overlapping with the greater than 200 MHz upstream bandwidth. The RFoG system may include a gateway facilitating an optical network unit and modem connection, the gateway having an express upstream port and an express downstream radio frequency (RF) port. The gateway may be configured for processing legacy RFoG signals in an upstream and a downstream direction and for at least one of generating or processing, via the express ports on the modem, RFoG signals in an extended spectrum beyond 42 MHz in the upstream direction and beyond 1000 MHz in the downstream direction.
    Type: Grant
    Filed: April 2, 2015
    Date of Patent: November 13, 2018
    Assignee: ARRIS Enterprises LLC
    Inventors: Zoran Maricevic, Marcel F. Schemmann, John Ulm
  • Patent number: 10128945
    Abstract: A receiving device for a multi-input multi-output (MIMO) visible light communication system includes a collimation unit, a metal thin film, a transparent substrate and a receiving unit. The receiving device performs receiving by using optical components, and uses the metal thin film as a main receiving component, which plays a role of filtering and enhanced transmission, and equals to implementing a function of filtering and signal amplification by using electronic components, but overcomes the nonlinear effect of the electronic components, thereby solving the problem of waveform distortion in receiving.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: November 13, 2018
    Assignee: ZTE CORPORATION
    Inventors: Zhou Zhi, Chao Xu, Tao Yang, Zhong Yu, Wei Wei
  • Patent number: 10128940
    Abstract: An optical transmission method wavelength-multiplexing and transmitting multiple channels including data. The data are composed of data areas independent between the channels and data areas non-independent between the channels. Data patterns of the data areas non-independent between the channels are variable. The data patterns of the data areas non-independent between the channels are set so that in time periods of the non-independent data areas on an optical transmission section, a time period during which polarization states of the multiple channels are correlated in the optical transmission section has a length such that an error rate is less than or equal to a threshold value, the error rate being determined from a temporal distribution of bit errors obtained from a result of error decision after demodulation in an optical receiver.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: November 13, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroki Goto, Tsuyoshi Yoshida, Kiyoshi Onohara, Takashi Sugihara, Kazuo Kubo, Tatsuya Kobayashi, Keisuke Matsuda, Masashi Binkai
  • Patent number: 10123100
    Abstract: An optical network transmits a wavelength division multiplexing optical signal from a transmission to a reception node via a reconfigurable optical add/drop multiplexer and/or path cross-connect apparatuses. When optical or optical super channels made of successive optical subcarriers input from input optical fibers are routed or switched to an output optical fiber in the multiplexer and/or apparatus passed through by a wavelength division multiplexing optical signal transmitted from the predetermined transmission node to the predetermined reception node, the adjacent channels output to the same output fiber in each input fiber is collectively demultiplexed without being demultiplexed for the channels and is routed or switched to the output fiber. Channel routing paths and frequency arrangements are controlled such that the number of filtering times by a wavelength division filtering mechanism on one or both sides on the frequency axis of the channel becomes equal to or less than a predetermined value.
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: November 6, 2018
    Assignee: JAPAN SCIENCE AND TECHNOLOGY AGENCY
    Inventors: Ken-ichi Sato, Hiroshi Hasegawa, Yojiro Mori, Yuki Terada
  • Patent number: 10122470
    Abstract: A receiver for an optical communications system which corrects distortion of a received signal. A clock recovery system utilizing a feedback and feedforward system are provided. The feedback loop comprises a phase detector and a clock source, while the feedforward loop comprises the phase detector and a delay element for delaying the output of distortion correction system. The feedback loop has a significantly lower bandwidth than the feedforward path. There are also provided methods of optimizing tap weights and of acquiring initial tap weights.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: November 6, 2018
    Assignee: Cisco Technology, Inc.
    Inventor: Christopher Fludger
  • Patent number: 10122447
    Abstract: It is impossible to prevent the deterioration of the coupling efficiency between received light and a single mode fiber, and difficult to achieve a higher transmission rate, with respect to a free space optical communication receiver; therefore, a free space optical receiver according to an exemplary aspect of the present invention includes light collecting means for collecting laser light having propagated through a free space transmission path; mode controlling means for separating the laser light collected by the light collecting means into a plurality of propagation mode beams depending on a wave-front fluctuation of the laser light and outputting the propagation mode beams; a plurality of single mode transmission media for guiding the plurality of propagation mode beams, respectively; and a plurality of light receiving means for receiving the plurality of propagation mode beams respectively through the plurality of single mode transmission media.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: November 6, 2018
    Assignee: NEC CORPORATION
    Inventors: Seigo Takahashi, Toshiharu Ito, Kohei Hosokawa
  • Patent number: 10120142
    Abstract: Provided is an optical transceiver module having a dual band pass WDM coupler embedded therein, wherein the dual band pass WDM coupler provides pass bands for selectively passing a transmission signal output from an optical transmitting unit, and an optical signal having a specific wavelength received by an optical receiving unit among optical signals input through a common port. According to the present invention, a size and cross-talk of the optical transceiver module may be reduced, and the optical transceiver module may be used as a video transceiver in an optical subscriber network according to an ITU-RG.983.3 standard.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: November 6, 2018
    Assignee: LIGHTRON FIBER-OPTIC DEVICES INC
    Inventors: Dong-Hyun Lee, Jin-Soo Choi, Yoon-Koo Kwon