Multiplex Patents (Class 398/43)
  • Patent number: 11409048
    Abstract: A tunable wavelength filtering device is presented in which the tuning mechanism is based on altering the incident angle to an optical thin film coating stack, or thin film optical filter. Rotating mirrors, such as Micro-Electro-Mechanical Systems (MEMS) tilt-mirrors, are used to alter the incident angle of the optical beam coming from an input fiber, and also to aim or align the exiting beam to an output optical fiber. The optical thin film coating stack can be implemented onto a glass substrate, to form a thin film filter chip. The thin film filter chip can be fixed in place, and the incident angle and exiting angle of the optical beam is varied by adjusting the tilt angle of the two rotating mirrors.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: August 9, 2022
    Assignee: DICON FIBEROPTICS, INC.
    Inventors: Jeffrey Lee, Junying Lu, Robert E. Schleicher, Ho-Shang Lee
  • Patent number: 11398711
    Abstract: A multicore optical fiber amplifier according to an exemplary aspect of the present invention includes a multicore optical fiber amplification medium including, in a clad, a plurality of cores doped with a rare earth element; signal light introduction means for introducing, into each of the plurality of cores, signal light with a wavelength included in a gain band of the multicore optical fiber amplification medium; excitation light introduction means for introducing, into the clad, excitation light for exciting the multicore optical fiber amplification medium; and control light introduction means for introducing control light into each of the plurality of cores, wherein the control light introduction means introduces the control light into a non-signal core into which the signal light is not being introduced, among the plurality of cores, only when the excitation light is being introduced.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: July 26, 2022
    Assignee: NEC CORPORATION
    Inventors: Shigeru Nakamura, Emmanuel Le Taillandier De Gabory, Shigeyuki Yanagimachi
  • Patent number: 11375422
    Abstract: A method by a coordination node is provided for controlling communications between Li-Fi APs and UEs. The method includes receiving peer connectivity reports from Li-Fi APs which identify Li-Fi APs having at least partially overlapping coverage areas, and developing a handover pathway data structure, based on the peer connectivity reports, that identifies Li-Fi APs that can receive communication handover from other identified Li-Fi APs. The method further includes determining an identifier of a first Li-Fi AP providing Li-Fi communication service for a UE, and accessing the handover pathway data structure using the identifier of the first Li-Fi AP to determine an identifier of a second Li-Fi AP to which handover from the first Li-Fi AP can be performed. The method then initiates handover of the Li-Fi communication service for the UE from the first Li-Fi AP to the second Li-Fi AP.
    Type: Grant
    Filed: December 10, 2020
    Date of Patent: June 28, 2022
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Keven Wang, Hongxin Liang, Nicolas Seyvet
  • Patent number: 11362783
    Abstract: Techniques for transmitting reference signals (RSs) having respective signal patterns in the coding chain to improve performance of multiple input, multiple output (MIMO) communication systems are presented. For downlink transmissions, an RS management component (RSMC) of a network node can determine a first resource element (RE) pattern for RSs of a first cell and a second RE pattern for RSs of a second cell in the time, frequency, or code domain. RSMC can utilize an adaptive interleaver in the coding chain to improve performance of MIMO systems. RSMC can facilitate configuring user equipment (UE) about the interleaver at the RE domain or as part of virtual resource block (VRB)-to-physical resource block (PRB) domain. RSMC can thereby reduce interference on RSs from other co-channel RSs, thereby improving channel estimation performance for channel-state-information estimation and data detection by the UE, and achieving significant gains in link and system throughputs.
    Type: Grant
    Filed: July 15, 2020
    Date of Patent: June 14, 2022
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventor: SaiRamesh Nammi
  • Patent number: 11356148
    Abstract: A system for transmitting signals includes Orbital Angular Momentum (OAM) processing circuitry for receiving a plurality of input signals and applying a different orbital angular momentum to each of the plurality of input signals for transmission to a second location. Electromagnetic knot processing circuitry receives a plurality of OAM processed signals from the OAM processing circuitry and applies an electromagnetic knot to each of the received OAM processed signal before transmission to the second location. Multiplexing circuitry multiplexes the plurality of OAM/electromagnetic knot processed signals into a single multiplexed OAM/electromagnetic knot processed signal. A first signal degradation caused by environmental factors of the OAM/electromagnetic knot processed signal is improved over a second signal degradation caused by the environmental factors of a signal not including the electromagnetic knot.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: June 7, 2022
    Assignee: NXGEN PARTNERS IP, LLC
    Inventor: Solyman Ashrafi
  • Patent number: 11327226
    Abstract: A photonics sensing system includes, in part, first and second multipath integrated optical networks, an optical radiator, and an optical receiver. The first multipath integrated optical network includes, in part, N optical delay elements each supplying one of N delayed optical signals of a received optical pulse, N optical modules each supplying a portion of a different one of the N delayed optical signals, and an optical combiner adapted to combine the N delayed portions to generate a modulated optical signal. The smallest of the N delays is smaller than a width of the received optical pulse. The optical radiator is adapted to radiate the modulated optical signal. The optical receiver is adapted to receive a reflection of the transmitted signal. The second multipath integrated optical network is adapted to demodulate the reflected signal received by the optical receiver.
    Type: Grant
    Filed: April 22, 2020
    Date of Patent: May 10, 2022
    Assignee: California Institute of Technology
    Inventor: Seyed Ali Hajimiri
  • Patent number: 11165967
    Abstract: A method includes determining a pattern of a change in luminance, by demodulating an identification information to be transmitted with a ceiling light, and transmitting the identification information, by the ceiling light changing in luminance according to the determined pattern of the change in luminance. Additionally, in the determining, a first luminance change pattern, corresponding to a first body, and a second luminance change pattern, corresponding to a first header used for the first body, are determined. Furthermore, in the transmitting, the first header and the first body are transmitted by the ceiling light changing in luminance according to the first luminance change pattern, the second luminance change pattern, and the first luminance change pattern in the stated order.
    Type: Grant
    Filed: November 12, 2020
    Date of Patent: November 2, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Mitsuaki Oshima, Koji Nakanishi, Hideki Aoyama, Ikuo Fuchigami, Hidehiko Shin, Tsutomu Mukai, Yosuke Matsushita, Shigehiro Iida, Kazunori Yamada
  • Patent number: 10892831
    Abstract: A Mach-Zehnder optical modulator creates a first driving signal to be applied to a first section, and a second driving signal to be applied to a second section, and includes a generator, an optical modulator, and a setting unit. The generator generates a first dither signal and a second dither signal. The optical modulator optical modulates an optical signal into a quaternary or more value optical modulation signal by applying the first driving signal superimposed by the first dither signal, and by applying the second driving signal superposed by the second dither signal. The setting unit sets, when a length of the second section is n times as long as the first section, the first dither signal and the second dither signal to have a same phase, and sets such that an amplitude of the first dither signal is n times as large as that of the second dither signal.
    Type: Grant
    Filed: January 9, 2020
    Date of Patent: January 12, 2021
    Assignee: FUJITSU OPTICAL COMPONENTS LIMITED
    Inventor: Manabu Watanabe
  • Patent number: 10887008
    Abstract: The present invention provides a method of optical transmission delay compensation of a system including a main unit and a remote unit, wherein the main unit and the remote unit are connected to each other through an optical transmission line, including: receiving a reference signal, by the remote unit, generated by the main unit through the optical transmission line; analog converting the reference signal and performing analog processing on the reference signal; converting the analog-processed reference signal into an RF signal and radiating the RF signal; and measuring a delay time until the reference signal is generated and radiated as the RF signal. Accordingly, it is possible to obtain an effect of preventing degradation of service quality due to interference by synchronizing remote units and improving the service quality.
    Type: Grant
    Filed: January 27, 2020
    Date of Patent: January 5, 2021
    Assignee: SOLiD. INC.
    Inventor: Ok Jin Kim
  • Patent number: 10873653
    Abstract: The present invention provides a method for transmitting a broadcast signal. The method for transmitting a broadcast signal according to the present invention may comprise the steps of: generating a plurality of items of signaling information for signaling broadcast data; generating a link layer packet using the plurality of items of signaling information; generating a broadcast signal using the link layer packet; and transmitting the broadcast signal.
    Type: Grant
    Filed: April 3, 2015
    Date of Patent: December 22, 2020
    Assignee: LG ELECTRONICS INC.
    Inventors: Woosuk Kwon, Sejin Oh, Kyoungsoo Moon
  • Patent number: 10862593
    Abstract: The objective of the present invention is to reduce the size of a receiving device circuit in an optical space communication system while maintaining communication stability. A data receiving device which decodes one item of data from a plurality of input signals includes: two or more digital signal processing means for subjecting the plurality of input signals to signal processing; a first recording means for temporarily recording the plurality of input signals; a SN ratio estimating means for estimating S/N ratios of each of the plurality of input signals and determining the number of the plurality of input signals to be combined, and the signals to be combined; and a scheduling means for carrying out overall control on the basis of the results from the SN ratio estimating means.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: December 8, 2020
    Assignee: NEC CORPORATION
    Inventors: Kohei Hosokawa, Toshiharu Ito, Seigo Takahashi, Manabu Arikawa, Takashi Ishikawa, Yoshimasa Ono
  • Patent number: 10782191
    Abstract: A system configured to monitor temperature in a plurality of zones of an aircraft includes an optical fiber with first and second ends, first and second connectors, and a first interrogator. The optical fiber includes a plurality of fiber Bragg gratings disposed in the optical fiber. The first connector is disposed on the first end of the optical fiber and the second connector is disposed on the second end of the optical fiber. The first interrogator is connected to the first connector and includes an optical switch. The optical switch is in optical communication with the first connector of the optical fiber and is configured to selectively block transmission of the optical signal to the optical fiber.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: September 22, 2020
    Assignee: Kidde Technologies, Inc.
    Inventors: Mark Sherwood Miller, Robert J. Norris, Lei Liu
  • Patent number: 10700807
    Abstract: Systems and methods for setting fiber input power for an optical transmission path may include determining an initial modulation format representing a uniform distribution QAM format, the initial modulation format associated with a first fiber input power and a first spectral efficiency, configuring optical transponders to apply probabilistic shaping to the initial modulation format when transmitting traffic over the optical transmission path, the traffic including probabilistically shaped signals with a second spectral efficiency, determining, dependent on the second spectral efficiency, a second fiber input power, and configuring optical amplifiers along the optical transmission path to transmit the traffic comprising the probabilistically shaped signals over the optical transmission path using the second fiber input power.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: June 30, 2020
    Assignee: Fujitsu Limited
    Inventors: Olga I. Vassilieva, Inwoong Kim, Tadashi Ikeuchi
  • Patent number: 10616496
    Abstract: An information communication method obtains information from a subject using a terminal device that includes an image sensor. The method includes setting an exposure time of the image sensor having a plurality of exposure lines so that a bright line corresponding to each of the plurality of exposure lines appears according to a change in luminance of the subject. The method also includes obtaining a bright line image including a plurality of bright lines, by capturing the subject that changes in luminance by the image sensor, and obtaining identification information of the subject. The subject has a rectangular shape, is captured with an around view of the subject. Each of the plurality of bright lines appears within the rectangular shape of the subject in the bright line image, and follows a direction between long sides of the rectangular shape of the subject in the bright line image.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: April 7, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Mitsuaki Oshima, Koji Nakanishi, Hideki Aoyama, Ikuo Fuchigami, Hidehiko Shin, Tsutomu Mukai, Yosuke Matsushita, Shigehiro Iida, Kazunori Yamada
  • Patent number: 10615875
    Abstract: Systems and methods for achieving full duplex bidirectional transmission across coaxial cable in a hybrid fiber-coaxial cable TV network. Some preferred systems and method will attenuate reflections propagated within the coaxial cable. Other preferred systems may echo-cancel reflections propagated within the coaxial cable.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: April 7, 2020
    Assignee: ARRIS Enterprises LLC
    Inventors: Venkatesh G. Mutalik, John Ulm, Marcel F. Schemmann
  • Patent number: 10554320
    Abstract: A method for mapping a packet service onto an optical transport network is disclosed. An embodiment of the method includes: receiving a packet service message from an access side, identifying the message by using a first board number of a first line board in which a first egress is located and a first port number of the first egress; sending the message to the first line board corresponding to the first board number; and encapsulating the message that is sent to the first line board, mapping the encapsulated message onto a first optical channel data unit ODU corresponding to the first port number, and sending the first ODU by using the first egress. Cross-connect scheduling of any bandwidth in any direction is implemented based on a packet service, and packet services on different tributary boards share different ODU timeslots or a same ODU timeslot on a same line board.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: February 4, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Hongjun Gao, Zhiyong Yan, Mingwei Liu
  • Patent number: 10554304
    Abstract: An apparatus comprises a laser emitter configured to transmit laser energy across an air gap to a separate device; a mobile industry processor interface (MIPI); driver circuitry electrically coupled to the laser emitter, wherein the driver circuitry is configured to receive an electrical signal according to an MIPI protocol and drive the laser emitter according to the electrical signal; a tone circuit configured to generate a tone signal of a specified tone frequency; and an MIPI mode detection circuit electrically coupled to the driver circuitry and the MIPI, wherein the MIPI mode detection circuit is configured to detect a change between a MIPI low power (LP) mode and a MIPI high speed (HS) mode at the MIPI interface, and add the tone signal to an electrical signal provided to the driver circuitry from the MIPI according to the detected change.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: February 4, 2020
    Assignee: Intel Corporation
    Inventor: Arvind Sundaram
  • Patent number: 10530474
    Abstract: An optical transmission device includes an optical amplifier that optically amplifies a wavelength multiplexing signal which is input, a wavelength selective switch that splits, inserts, or transmits an optical signal of any wavelength of the wavelength multiplexing signal, an optical channel power monitor that detects power of each channel of the wavelength multiplexing signal which is input and the wavelength multiplexing signal which is output, and a controller that calculates an amount of change in the optical signal of each channel in which a gain of each channel between an input and an output to and from the device is steady, and adjusts an amount of attenuation of the wavelength selective switch, based on the power of each channel of the wavelength multiplexing signal that is detected by the optical channel power monitor.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: January 7, 2020
    Assignee: FUJITSU LIMITED
    Inventor: Masahiro Yuki
  • Patent number: 10523332
    Abstract: An optical transmitter includes: an amplitude control circuit, an E/O (Electrical-to-Optical) circuit, a detector and an optical power control circuit. The amplitude control circuit controls an amplitude of an input electric signal to generate a constant amplitude electric signal. The E/O circuit generates a modulated optical signal from the constant amplitude electric signal by a direct modulation. The detector detects an amplitude modulation component of the input electric signal. The optical power control circuit controls a power of the modulated optical signal based on the amplitude modulation component detected by the detector.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: December 31, 2019
    Assignee: FUJITSU LIMITED
    Inventor: Alexander Nikolaevich Lozhkin
  • Patent number: 10419148
    Abstract: An optical node (100) is disclosed. The optical node (100) comprises first and second line ports (104, 106) for Wavelength Division Multiplexing (WDM) signals and first and second pluralities of local add/drop ports (108, 110) for optical signals. The optical node further comprises a wavelength selective switch (112), coupled between the first and second line ports (104, 106) and configured to drop optical signals from a WDM signal traversing the optical node between the first and second line ports (104, 106), and a node optical combiner (114) coupled between the first and second line ports (104, 106) and configured to add optical signals to a WDM signal traversing the optical node between the first and second line ports (104, 106).
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: September 17, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Giulio Bottari, Fabio Cavaliere, Francesco Testa
  • 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: 10397133
    Abstract: An upstream allocation circuit (14) and a downstream allocation circuit (15) are provided in an OLT (1). For example, a superimposed frame obtained by bundling upstream frames (upstream control frames+upstream data frames) from all ONUS is input to the upstream allocation circuit (14) via a frame reproduction circuit (12-1). The superimposed frame may be generated at the stage of optical signals or generated after converting optical signals into electrical signals. The upstream allocation circuit (14) allocates each of the upstream control frames bundled into the superimposed frame to a predetermined PON control circuit (13) based on information (PON port number or LLID) added to the frames. The downstream allocation circuit (15) allocates, to a preset frame reproduction circuit (12), each downstream control frames output from the PON control circuits (13).
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: August 27, 2019
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Saki Hatta, Tomoaki Kawamura, Kenji Kawai, Nobuyuki Tanaka, Satoshi Shigematsu, Namiko Ikeda, Shoko Ohteru, Junichi Kato
  • Patent number: 10382139
    Abstract: A method for optimizing reception of a polarized single-carrier transmission, including transmitting a polarized single-carrier transmission to a receiver, receiving feedback from the receiver of a figure of merit of the polarized single-carrier transmission, and electronically changing polarization of the polarized single-carrier transmission based on the feedback. A single-carrier communication transmitter including a source for a polarized single-carrier transmission signal, a circuit for receiving feedback from a receiver describing a figure of merit of a received polarized single-carrier transmission, and a circuit for changing polarization of the polarized single-carrier transmission signal, based on the feedback. Related apparatus, systems and methods are also described.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: August 13, 2019
    Assignee: Ceragon Networks Ltd.
    Inventors: Isaac Rosenhouse, Oz Harel, Haggai Mizrahi, David Heller, Gur Ballas
  • Patent number: 10341039
    Abstract: In some embodiments, an apparatus includes a reconfigurable optical add-drop multiplexer (ROADM). The ROADM has a wavelength selective switch (WSS) that does not perform power equalization when the WSS is operative. The ROADM also has a first pre-amplifier, a first channel power equalizer operatively coupled to the first pre-amplifier, a second pre-amplifier operatively coupled to the first channel power equalizer and the WSS, a first post-amplifier operatively coupled to the WSS, a second channel power equalizer operatively coupled to the first post-amplifier, and a second post-amplifier operative coupled to the second channel power equalizer.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: July 2, 2019
    Assignee: Juniper Networks, Inc.
    Inventor: Essam Tony Keddis
  • Patent number: 10274687
    Abstract: A highly integrated multi-channel optical transceiver module based on silicon photonic chip technology includes an integrated silicon photonic chip, an integrated circuit chip, and a printed circuit board assembly. The integrated silicon photonic chip and the integrated circuit chip are both integrated on silicon substrates and are furthered bonded on printed circuit board assembly. The integrated silicon photonic chip includes a silicon photonic transmitter chip and a silicon photonic receiver chip that both connected to optical fiber connectors through the optical fiber patch cord jumpers. The integrated circuit chip includes an integrated circuit transmitter chip that connected to the silicon photonic transmitter chip through a wire bonding, and an integrated circuit receiver chip that connected to the silicon photonic receiver chip through a wire bonding.
    Type: Grant
    Filed: January 17, 2018
    Date of Patent: April 30, 2019
    Assignees: Jiangsu Hengtong Optical Network Technology Co., Ltd., Jiangsu Hengtong Optic-Electric Co., Ltd.
    Inventors: Weiming Shi, Xiaohan Shen, Hu Xu, Quan Sun, Yinzhou Cai, Xiaojia Yang
  • Patent number: 10222547
    Abstract: A flame retardant optical fiber is provided. The flame retardant optical fiber includes a glass core, a cladding surrounding the glass core and a primary coating adhered to the cladding. The flame retardant optical fiber also includes a secondary coating surrounding the primary coating, wherein the secondary coating is formed from a coating composition that is substantially free of an oligomeric component and that comprises a flame retardant composition including a flame retardant material.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: March 5, 2019
    Assignee: CORNING INCORPORATED
    Inventors: Yangbin Chen, Emanuela Gallo, Manuela Ocampo
  • Patent number: 10211944
    Abstract: A station-side device performs transmission and reception of an optical signal to and from a subscriber-side device, and includes a communication control unit configured to perform optical signal communication using a plurality of wavelengths by wavelength division multiplexing and time division multiplexing; and a registration unit configured to set an acceptance period in at least one wavelength among the plurality of wavelengths, to perform a new registration of a subscriber-side device in response to a registration request of the subscriber-side device received within the acceptance period, and not to set the acceptance period in at least one other wavelength among the plurality of wavelengths.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: February 19, 2019
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tomoaki Yoshida, Shigeru Kuwano
  • Patent number: 10164711
    Abstract: A scheme for generating asymmetric single sideband photonic vector signal at millimeter wave spectral region is described. At a transmitter, information bits to be transmitted are modulated using a vector modulation technique to generate a baseband signal. The baseband signal is converted into its single sideband (SSB) version using a complex frequency source having a first frequency. The real part of the upconverted signal is added to the real part of a second frequency source and is input as I component to an I/Q modulator. The imaginary part of the upconverted signal is added to the imaginary part of the second frequency source and is used as the Q component. The I/Q modulator is driven by a laser source at frequency fc. The resulting signal is transmitter over an optical transmission medium and upconverted by a single-ended photodiode to a desired radio-frequency (RF) carrier frequency.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: December 25, 2018
    Assignee: ZTE Corporation
    Inventors: Jianjun Yu, Xinying Li, Hung-Chang Chien
  • Patent number: 10129016
    Abstract: A serializer circuit may include a recovery circuit, an adjusting circuit, and a multiplexer circuit. The recovery circuit may be configured to receive a first data signal at a first frequency, to generate a first clock signal at the first frequency using the first data signal, and to retime the first data signal based on the first clock signal to generate a retimed first data signal. The adjusting circuit may be configured to receive a second data signal and retime the second data signal based on the first clock signal to generate a retimed second data signal. The multiplexer circuit may be configured to multiplex the retimed first data signal and the retimed second data signal.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: November 13, 2018
    Assignee: FINISAR CORPORATION
    Inventors: The'Linh Nguyen, Daniel K. Case
  • Patent number: 10069276
    Abstract: A method to tune an emission wavelength of a wavelength tunable laser apparatus is disclosed. The laser apparatus implements, in addition to a wavelength tunable laser diode (t-LD) integrating with a semiconductor optical amplifier (SOA), a wavelength monitor including an etalon filter. The current emission wavelength is determined by a ratio of the magnitude of a filtered beam passing the etalon filter to a raw beam not passing the etalon filter. The method first sets the SOA in an absorbing mode to sense stray component disturbing the wavelength monitor, then correct the ratio of the beams by subtracting the contribution from the stray component.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: September 4, 2018
    Assignee: Sumitomo Electric Device Innovations, Inc.
    Inventors: Hirokazu Tanaka, Tetsufumi Odagawa, Hiromitsu Kawamura, Masao Shibata
  • Patent number: 10033521
    Abstract: The present disclosure discloses a method for training time slot synchronization of nodes in an Optical Burst Transport Network (OBTN), a node device and a network. The method includes that: a node trains a reference time delay between receiving of a control frame and receiving of a data frame, wherein the data frame and the control frame are within one period; and the node trains a sending time slot between sending of adjacent data packets in the data frame.
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: July 24, 2018
    Assignee: ZTE CORPORATION
    Inventors: Wei Lu, Yingchun Shang, Huilong Xia, Sheping Shi, Lei Wang
  • Patent number: 10009672
    Abstract: An optical transmission system and transmission method, an optical switching apparatus, and a control method are provided. Any data transmission apparatus included in an optical transmission system is configured to: transmit an optical label signal and a continuous data signal including an idle sequence and a data packet, and transmit the transmitted optical label signal to an optical switching apparatus, so that the optical switching apparatus builds, according to the optical label signal, a switching and transmission path for transmitting the continuous data signal transmitted by the any data transmission apparatus. This ensures that a data transmission apparatus transmits a continuous data signal, and also ensures that each optical receiving system can receive the continuous data signal. Therefore, no preamble needs to be added before a data packet carried in a to-be-processed data signal, thereby avoiding a resource waste and saving bandwidth resources.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: June 26, 2018
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Huixiao Ma, Xiaoling Yang, Shuaibing Li
  • Patent number: 9998213
    Abstract: A network tap with battery assisted and programmable failover is disclosed. The network tap includes a processing element, at least one optical-electrical transceiver, and at least one multiplexer/demultiplexer module. A backup battery provides power to the optical-electrical transceiver(s) and the multiplexer/demultiplexer module(s) but not the processing element when operating in a failover mode. The network tap is programmable to operate in a fail open mode in which traffic received from the network passes through the network tap during failover or a fail closed mode in which traffic receive from the network is blocked during failover.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: June 12, 2018
    Assignee: KEYSIGHT TECHNOLOGIES SINGAPORE (HOLDINGS) PTE. LTD.
    Inventors: Randy Fung, Marcel Felix Desdier, Ky Hong Le
  • Patent number: 9960856
    Abstract: A receiver is provided, including a signal acquiring unit, a signal diversity unit that is connected to the signal acquiring unit, a signal combination unit that is connected to the signal diversity unit, and a digital-signal acquiring unit that is connected to the signal combination unit. The receiver can receive a dual-polarization signal and can eliminate SSBI from the dual-polarization signal.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: May 1, 2018
    Assignee: Huawei Technologies Co., Ltd
    Inventors: Zhaohui Li, Xuebing Zhang, Huixiao Ma
  • Patent number: 9954645
    Abstract: A method and apparatus for providing a secure transmission based on a polar code are provided. A device generates an output bit sequence by applying a polar code generator matrix to an input bit sequence and transmits the output bit sequence to a target receiver. The input bit sequence includes first information bits, second information bits and third information bits. The first information bits correspond to gray bit channels for the target receiver and bad bit channels for an eavesdropper. The third information bits correspond to good bit channels for the target receiver and gray bit channels for the eavesdropper.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: April 24, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Joonkui Ahn, Ilmin Kim, Byounghoon Kim
  • Patent number: 9906357
    Abstract: An optical receiver includes a detector and frame synchronizer. The detector receives an optical OFDM bit stream having a plurality of frames. Each frame has an in-phase and quadrature phase component. Each component has an OFDM symbol-bearing data payload and a synchronization header. The synchronization header includes a single synchronization pulse. The frame synchronizer detects the synchronization header on each phase component. The frame synchronizer includes first and second pairs of digital comparators for each of the in-phase and quadrature phase components. The first and second pairs of digital comparators associated with each phase component establishes different and adjustable threshold windows that is symmetric about a zero amplitude of the synchronization pulse of the respective phase component.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: February 27, 2018
    Assignee: THE ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA
    Inventors: Stanley Johnson, Milorad Cvijetic
  • Patent number: 9838128
    Abstract: A system and method are presented for coupling OAM optical beams to optical fibers. The system may include, for instance, an OAM beam generator, for receiving one or more of a plurality of input signals, and generating a different OAM mode signal for each input signal. The OAM beam generator may further be operative to adjust a location and/or an exit angle of the one or more OAM mode signals before sending the one or more OAM mode signals to a beam combiner that combines the one or more OAM mode signals into a combined mode OAM transmission. The system may further include a controller in communication with at least one crosstalk estimate sensor and the at least one OAM beam generator, the controller operative to optimize the crosstalk estimate by receiving the crosstalk estimate for one of the OAM mode signals, and sending control instructions instructing the OAM beam generator to adjust a location and/or an exit angle of the one or more OAM mode signals to reduce the crosstalk estimate.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: December 5, 2017
    Assignee: Huawei Technologies Canada Co., Ltd.
    Inventors: Leslie Rusch, Irfan Muhammad Fazal, Karen Allahverdyan, Reza Mirzaei Nejad, Mohammad Mehdi Mansouri Rad
  • Patent number: 9791544
    Abstract: Disclosed are methods, systems, devices, apparatus, computer-/processor-readable media, and other implementations, including a method, at a processor-based mobile device, that includes determining a first set of candidate positions of the mobile device corresponding to a first time instance based, at least in part, on position data including a first set of identifiers decoded from signals including respective first one or more light-based communications received by the mobile device from a first one or more light devices, with the mobile device being located at a first location at the first time instance. The method further includes selecting at least one candidate position from the first set of candidate positions, in response to a determination that the first set of candidate positions includes more than one candidate position, in order to resolve positional ambiguity, based, at least partly, on further position data from further signals from one or more devices.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: October 17, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Aleksandar Jovicic, Hua Wang, Elizabeth Gene
  • Patent number: 9759660
    Abstract: A sensor assembly, a method, and a measuring system for capturing the distribution of at least one variable of an object are disclosed. The sensor assembly has at least one sensor element comprising at least one first sensor sub-element and at least one second sensor sub-element. The at least one first sensor sub-element is transparent for at least one wavelength region of light, the at least one second sensor sub-element is sensitive to at least one variable. Furthermore a method and measuring system and an illumination system for illuminating the sensor assembly and the object is provided.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: September 12, 2017
    Assignee: PreSens—Precision Sensing GmbH
    Inventor: Achim Stangelmayer
  • Patent number: 9755980
    Abstract: Embodiments of the present disclosure disclose a dynamic bandwidth scheduling method and device, and a computer storage medium. The method is applied to each node in an Optical Burst Transport ring-Network (OBTN) and includes that: when a target node serves as a master node, for each source node in the OBTN, when a timeslot is allocated for a connection from the source node to a certain destination node, a timeslot occupied by a destination node having the smallest hop count to a destination node configured currently is selected preferentially among timeslots in which there exists an Optical Burst (OB) where there has been no drop operation; and when the target node serves as a master node, a timeslot allocation result is converted into a bandwidth map and the bandwidth map is sent to each slave node in the OBTN.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: September 5, 2017
    Assignee: ZTE Corporation
    Inventors: Xue Chen, Shaoliang Luo, Hongxiang Guo, Xintian Hu, Gaofeng An
  • Patent number: 9736557
    Abstract: The present invention discloses a method for assigning and processing a label in an optical network. The method includes: learning that a label switched path is required to be established in an optical network; generating a label, in which the label is used for indicating that a first optical channel data unit is multiplexed to a second optical channel data unit; the label includes a tributary slot type indication field that is used for indicating a tributary slot type of the second optical channel data unit, and the label further includes a tributary slot assignment indication field that is used for indicating a tributary slot occupied in the second optical channel data unit into which the first optical channel data unit is multiplexed; and sending the label to a node on the label switched path by a signaling message of GMPLS.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: August 15, 2017
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yi Lin, Xiaobing Zi
  • Patent number: 9693427
    Abstract: A control system for use in a network. The control system includes an input device coupled to the network to generate an input signal. The control system also includes an RGBW controller having a plurality of input channels and a plurality of output channels, and is coupled to the network. The RGBW receives the input signal at the input channels, determines if the input signal meets a predetermined condition, and generates a series of independent output signals at the plurality of output channels in response to the input signal meeting a predetermined condition. The control system also includes one or more output devices to receive one or more of the independent output signals, and to perform one or more functions in response to receiving one or more of the independent output signals.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: June 27, 2017
    Assignee: FIBAR GROUP S.A.
    Inventors: Maciej Fiedler, Bartlomiej Arcichowski, Adam Pudlowski
  • Patent number: 9647761
    Abstract: Flexible rate communication signalling apparatus and methods are disclosed. A determination is made as to a set of one or more of first frames and second frames which would provide a desired communication rate. The first frames and the second frames have a common frame structure but different associated rates. The determined set of one or more of the first frames and the second frames, including received client signals, is generated.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: May 9, 2017
    Assignee: INPHI CORPORATION
    Inventors: Jean-Michel Caia, Juan-Carlos Calderon, Arun Zarabi
  • Patent number: 9638865
    Abstract: The present invention provides a switch device for an optical signal which has high extendibility and which can suppress an increase of loss in extension. A switch device in one embodiment of the present invention includes, in a housing, four splitter portions, four switch portions, and extension splitter portions. The splitter portions are connected to path-side ports, the switch portions are connected to client-side ports, and the splitter portions and the switch portions are connected to one another via shuffle fiber arrays. One ends of the extension splitter portions are connected to path-side extension ports, and the other ends thereof are connected to client-side extension ports. The number of wavelengths processable by the switch device can be easily changed by changing a connection state of optical fibers to the path-side ports, the client-side ports, the path-side extension ports, and the client-side extension ports.
    Type: Grant
    Filed: April 6, 2016
    Date of Patent: May 2, 2017
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Junichi Hasegawa, Kazutaka Nara
  • Patent number: 9584227
    Abstract: System, methods and apparatus are described that facilitate transmission of data between two devices. A data transfer method includes receiving first data from a first interface, the first data being received in signaling transmitted by a first device according to a first protocol, determining a mode of operation for a communication link to be used for transmitting the first data to a second device, transmitting the first data to the second device over an optical path of the communication link in a first mode of operation, transmitting the first data in accordance with the first protocol to the second device over an electrical path of the communication link in a second mode of operation, and in a third mode of operation, translating the first data to obtain second data, and transmitting the second data in accordance with a second protocol to the second device over the electrical path.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: February 28, 2017
    Assignee: QUALCOMM Incorporated
    Inventor: George Alan Wiley
  • Patent number: 9571196
    Abstract: An optical communication system is disclosed. The optical communication system comprises an optical transmitter and a substantially circular multi-mode optical fiber. The optical transmitter comprises a generator of at least two free space circular vortices and comprises an optical element configured to receive the at least two free space circular vortices and to couple them to an input facet of the optical fiber. The optical fiber is configured to receive at the input facet the at least two free space circular vortices and is configured to generate therefrom at least two corresponding guided circular vortices having respective propagation constants, wherein the values of the propagation constants at a defined frequency are different each other.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: February 14, 2017
    Assignee: Politecnico do Milano
    Inventors: Paolo Martelli, Alberto Gatto, Mario Martinelli
  • Patent number: 9553690
    Abstract: The present disclosure discloses a method, wherein the method comprises generating a passive optical network (PON) protocol message, wherein the PON protocol message comprises an identifier of a PON user terminal and an action indication indicating that the PON user terminal intends to exercise a first power supply mode that is a power-saving mode. The present disclosure further provides a method for controlling the PON power supply and for reporting the power supply state. The present disclosure allows control of the energy usage of the PON user terminal to save power when a service in the PON user terminal is not used or when the user terminal uses a backup power source to supply power.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: January 24, 2017
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Hai Gao, Yinghua Dong
  • Patent number: 9507113
    Abstract: An exemplary optical distribution frame includes a frame structure defining multiple positions into which multiple chassis can be inserted and a frame controller unit attached to the frame structure. The frame structure includes a frame controller and a switch communicatively coupled to the frame controller, wherein the switch includes a multiple ports. The frame structure including multiple cables, each cable being attached to a respective one of the ports of the switch and routed and attached to the optical distribution frame so that each cable can be attached to a chassis inserted into a predetermined one of the positions in the optical distribution frame, wherein the frame controller is configured to communicate port mapping information to a management entity that is communicatively coupled to the frame controller for use by the management entity in associating location information with a chassis inserted into the optical distribution frame.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: November 29, 2016
    Assignee: CommScope Technologies LLC
    Inventors: Jonathan T. Lawson, Joseph C. Coffey, John P. Anderson, Laxman R. Anne
  • Patent number: 9503211
    Abstract: A signal detection circuit includes: a first optical filter configured to filter an optical signal carrying a frequency modulated signal with a first transmission band; a second optical filter configured to filter the optical signal with a second transmission band; a first photo detector configured to convert the output light of the first optical filter into a first electrical signal; a second photo detector configured to convert the output light of the second optical filter into a second electrical signal; a difference circuit configured to output a signal representing a difference between the first electrical signal and the second electrical signal; and a detector configured to detect the frequency modulated signal based on the output signal of the difference circuit.
    Type: Grant
    Filed: January 26, 2016
    Date of Patent: November 22, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Kazuo Hironishi, Shoichiro Oda, Takeshi Hoshida
  • Patent number: 9496957
    Abstract: Embodiments of the present invention provide a method and an apparatus for allocating optical spectrum bandwidth resources. The method includes: first determine bandwidth of an OTUbase according to optical-layer frequency grid bandwidth and carrier spectrum efficiency; then construct an HO OTUflex according to bandwidth of customer service data and the bandwidth of the OTUbase, bandwidth of the HO OTUflex is a first integer multiple of the bandwidth of the OTUbase; map the customer service data into a payload area of the HO OTUflex and encapsulate overhead information; at last, modulate the HO OTUflex that carries the customer service data to a second integer number of optical channel carriers. The embodiments of the present invention apply to a scenario where customer service data is transported.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: November 15, 2016
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Wei Su, Chiwu Ding, Qiuyou Wu, Huaping Qing, Yao Shen, Hongli Jiang, Jianying Wei