Patents Examined by Leslie C Pascal
  • Patent number: 10938500
    Abstract: A method for dual polarisation optical transmission is disclosed. The method comprises splitting a continuous wave light source into first and second sub-channels, optically modulating each sub-channel with a data signal, and superimposing a first pilot tone onto the first optically modulated sub-channel and a second pilot tone, different from the first pilot tone, onto the second optically modulated sub-channel. The method further comprises polarisation multiplexing the first and second sub-channels to form a polarisation multiplexed signal, in which the first and second sub-channels have orthogonal states of polarisation, and transmitting the polarisation multiplexed signal.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: March 2, 2021
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Fabio Cavaliere, Gianluca Meloni, Francesco Fresi, Vito Sorianello
  • Patent number: 10938486
    Abstract: An optical bus for multi-core processing providing optical data transfer between cores through a single planar waveguide employing a variable-thickness, light-propagation layer having a progressively changing effective refractive index in accordance with lateral position within the light-propagation layer such that light emission from a single light emitter in communication with one core is focused on each of multiple photodetectors in communication with its respective processer core.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: March 2, 2021
    Assignee: YEDA RESEARCH AND DEVELOPMENT CO. LTD.
    Inventor: Ulf Leonhardt
  • Patent number: 10928318
    Abstract: Sticking of core layer is suppressed, and deterioration of sensitivity of a sensor is prevented. An optical waveguide (10) includes a substrate (15), a core layer (11), a support, and a protrusion (18). The core layer (11) can transmit light. The support connects at least a portion of the substrate (15) and a portion of the core layer (11) together. The support supports the core layer (11). The protrusion (18) is arranged at a position different from a position of the support in a space between the substrate (15) and the core layer (11). The protrusion (18) has a maximum height at a position deviated from a central position cp of the core layer (11) in a width direction. The protrusion (18) protrudes toward the core layer (11) from the substrate (15).
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: February 23, 2021
    Assignee: Asahi Kasei Microdevices Corporation
    Inventors: Tatsushi Yagi, Takaaki Furuya, Toshiro Sakamoto
  • Patent number: 10931369
    Abstract: In some embodiments, an apparatus comprises a memory and a processor operatively coupled to the memory. The processor is configured to receive, from a forward error correction (FEC) decoder of an optical transponder, a first plurality of pre-FEC bit error rate (BER) values at a plurality of times to identify a degradation over a first transmission path. The processor is configured to determine, based on the first plurality of pre-FEC BER values, a signal pattern. The processor is configured to adjust, based on the signal pattern, a set of parameters including a first threshold and a second threshold. The processor is configured to send, in response to a second pre-FEC BER value exceeding the second threshold and being below the first threshold, a signal to trigger traffic rerouting to a second transmission path to reduce traffic loss due to the degradation over the first transmission path.
    Type: Grant
    Filed: March 25, 2020
    Date of Patent: February 23, 2021
    Assignee: Juniper Networks, Inc.
    Inventors: Remo Maccaglia, Gert Grammel
  • Patent number: 10908366
    Abstract: Aspects and techniques of the present disclosure relate to an alignment device that includes a groove-type alignment structure with a support region for receiving an optical fiber inserted along a fiber insertion axis. The optical fiber has a first side and a second, opposite side. The groove-type alignment structure engages the first side of the optical fiber. The alignment device includes a stabilization structure that engages the first side of the optical fiber and a first angled transition surface that engages the second, opposite side of the optical fiber. The present disclosure also relates to an alignment system that includes a first housing piece; a second housing piece adapted to mate with the first housing piece; and a flat structure positioned between the first and second housing pieces.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: February 2, 2021
    Assignee: CommScope Technologies LLC
    Inventors: Steven C. Zimmel, Michael James Ott, Danny Willy August Verheyden, Michael Aaron Kadar-Kallen, Gary William Adams, Robert Charles Flaig, Gregory J. Schaible
  • Patent number: 10903937
    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: April 20, 2020
    Date of Patent: January 26, 2021
    Assignee: INPHI CORPORATION
    Inventors: Benjamin P. Smith, Arash Farhoodfar
  • Patent number: 10897314
    Abstract: In order to suppress any reduction in the reception performance of an optical transceiver, the optical transceiver includes a light source, an optical splitter that splits the output of the light source into a first split light and a second split light, an optical modulation unit that modulates the first split light, a coherent receiver that causes the inputted received light to interfere with the second split light, and a first control unit that controls the split ratio of the optical splitter on the basis of the reception characteristic of the received light received by the coherent receiver.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: January 19, 2021
    Assignee: NEC CORPORATION
    Inventor: Yuta Goebuchi
  • Patent number: 10892826
    Abstract: A multi-satellite system includes a first satellite and a second satellite configured to be separated in a predetermined distance between the satellites after being launched into space, and a tether including an optical fiber having first and second ends, wherein the first end is connected to the first satellite and the second end is connected to the second satellite, wherein a length of the tether is greater than the predetermined distance. In this case, the first satellite includes an optical transceiver connected to the first end of the optical fiber to provide a communications link to the second satellite, a spool containing partial winding of the tether, and a free space optical transceiver to provide a first communications link to a first distant satellite.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: January 12, 2021
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Kieran Parsons, Avishai Weiss, Philip Orlik, Stefano Di Cairano
  • Patent number: 10890713
    Abstract: A light emitting group is provided. The light emitting group includes at least two optical cables are adjacent to each other, wherein each optical cable respectively comprises a conductive material and a light guide material, wherein the light guide material covers the conductive material, and a plurality of encapsulated light emitting elements, wherein each optical cable corresponds to at least one encapsulated light emitting element, and the encapsulated light emitting elements are positioned at a terminal of each optical cable, wherein a minimum side of the encapsulated light emitting element is longer than a thickness of the light guide material, and a connecting line is connected with two centers of the two optical cables from a cross-sectional direction, and at least one encapsulated light emitting element overlaps with a perpendicular bisector in the connecting line.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: January 12, 2021
    Assignee: Lumieye Technology Co., Ltd.
    Inventors: Yao-Cheng Li, Yu-Chieh Chen
  • Patent number: 10871664
    Abstract: An optical modulator includes an optical waveguide formed on a substrate and modulates a light wave propagating through the optical waveguide, in which the optical waveguide has a configuration in which a plurality of branching parts are connected to each other in multiple stages, each of branched waveguides branched from a branch point of a first branching part among the plurality of branching parts has a transition curve of which a curvature changes, in a predetermined section from the branch point, each of the branched waveguides is formed by the transition curve starting from a curvature of 0, and a curvature change and a width change of the optical waveguide are set to be symmetric between the branched waveguides, and second branching parts formed in the respective branched waveguides are disposed at different positions between the branched waveguides in a direction along a propagation axis of the optical waveguide.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: December 22, 2020
    Assignee: Sumitomo Osaka Cement Co., Ltd.
    Inventors: Norikazu Miyazaki, Yuu Kataoka
  • Patent number: 10866365
    Abstract: An optical connector includes: a ferrule; a mechanical splice mechanically connecting an optical fiber to a shorter fiber; an optical fiber holder fixing the optical fiber in position; a joint member connecting the mechanical splice to the optical fiber holder; a housing accommodating the ferrule and the mechanical splice therein; a rear body accommodating at least a part of the optical fiber holder; and a coil spring urging the mechanical splice toward the front. The joint member is arranged in at least one of the housing and the rear body. The rear body has a guide wall to guide the optical fiber into the mechanical splice, and the guide wall is arranged between the mechanical splice and the optical fiber holder and has a tapered inner wall surface expanding from the mechanical splice toward the fiber holder.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: December 15, 2020
    Assignees: JAPAN COMMUNICATION ACCESSORIES MANUFACTURING CO., LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Mitsumasa Seita, Daizo Nishioka
  • Patent number: 10859767
    Abstract: An optical fiber cutter includes: a base member; a movable member that clamps the optical fiber extending from a fiber holder and that moves with respect to the base member between an advanced position and a retracted position in an extending direction of the optical fiber; a biasing member that biases the movable member at the retracted position forward; a locking member that regulates forward movement of the movable member at the retracted position; a cutter supporter that supports a blade that forms an initial cut in the optical fiber, that moves in a direction that intersects with the extending direction of the optical fiber, and that forms the initial cut at an initial cut forming position between the fiber holder and the movable member; and an unlocking member that releases the regulation of forward movement of the movable member before the blade reaches the initial cut forming position.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: December 8, 2020
    Assignee: Fujikura, Ltd.
    Inventors: Takaharu Matsuda, Kunihiko Fujiwara, Ryo Koyama, Mitsuru Kihara
  • Patent number: 10830954
    Abstract: An optical coupling device is described herein. The optical coupling device comprises a first waveguide and a second waveguide that are formed on a common substrate, and a resonator that is positioned out of plane with the two waveguides. The resonator and waveguides are positioned such that light traveling in each of the waveguides evanescently couples to the resonator but not to the other of the waveguides. The optical coupling device can be used in connection with improving linewidth of a laser source for a lidar sensor. In another example, the optical coupling device can be used in connection with wavelength division multiplexing.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: November 10, 2020
    Assignee: GM Cruise Holdings LLC
    Inventors: Jacob Levy, Vala Fathipour, Lutfollah Maleki, Vladimir S. Ilchenko
  • Patent number: 10819423
    Abstract: A method in a network node for determining information associated with an optical fiber in a communications network. The optical fiber is connected to an optical transceiver unit. The network node configures the optical transceiver unit to transmit at least one first optical signal via the optical fiber, wherein the at least one first optical signal is an optical pulse train defined by a determined period. The network node then obtains information associated with at least one second optical signal received by the optical transceiver unit via the optical fiber in response to the transmitted at least one first optical signal. Thus, the network node may determine information associated with the optical fiber based on the obtained information. Also, an optical transceiver unit for enabling a determination of information associated with an optical fiber in a communications network and methods therein.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: October 27, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Adriana Rosa Dortschy, Boris Dortschy
  • Patent number: 10816727
    Abstract: Structures for a waveguide bend and methods of fabricating a structure for a waveguide bend. A waveguide core has a first section, a second section, and a waveguide bend connecting the first section with the second section. The waveguide core includes a first side surface and a second side surface, the first side surface extends about an inner radius of the waveguide bend, and the second side surface extends about an outer radius of the waveguide bend. The waveguide bend includes a central region and a side region that is arranged adjacent to the central region at the first side surface or the second side surface. The central region has a first thickness, and the side region has a second thickness that is less than the first thickness.
    Type: Grant
    Filed: June 14, 2019
    Date of Patent: October 27, 2020
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Yusheng Bian, Ajey Poovannummoottil Jacob
  • Patent number: 10812181
    Abstract: An embodiment includes an optical transmitter. An optical transmitter may include a primary laser for transmitting a primary optical signal and a backup laser for transmitting a backup optical signal. The optical transmitter may further include a photonic integrated circuit (PIC). The PIC may include at least one input port configured to receive the primary optical signal from the primary laser and the backup optical signal from the backup laser. The PIC may also include at least one output port configured to receive each of the primary optical signal and the backup optical signal. The optical transmitter may be configured to activate the backup laser upon determining that the primary laser has failed or is failing.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: October 20, 2020
    Assignee: II-VI Delaware Inc.
    Inventors: Xiaojie Xu, Bernd Huebner, Rafik Ward, Martin Huibert Kwakernaak
  • Patent number: 10782543
    Abstract: Methods and systems for a distributed Mach-Zehnder Interferometer (MZI) with an integrated feed forward equalizer (FFE) may include a photonic chip comprising an optical modulator having diode drivers, local voltage domain splitters, and delay elements, where each is distributed along a length of the optical modulator. Outputs of the delay elements may be coupled to inputs of the local domain splitters, and outputs of the local voltage domain splitters may be coupled to inputs of the diode drivers. A feed forward equalization (FFE) module comprising a configurable delay element with inverted outputs coupled to one of the delay elements along the length of the modulator, may be coupled to a local voltage domain splitter. An input electrical signal may be received and delayed using the delay elements and coupled to the local domain splitters, and input electrical signals for the diode drivers may be generated using the local domain splitters.
    Type: Grant
    Filed: June 11, 2018
    Date of Patent: September 22, 2020
    Assignee: Luxtera LLC
    Inventors: Brian Welch, Scott Denton, Joseph Balardeta, Simon Pang
  • Patent number: 10778327
    Abstract: An optical trunk switch supporting an Optical Time-Domain Reflectometer (OTDR) includes a transmit switch configured to provide an input signal to one or more of a primary fiber path and a standby fiber path; a receive switch configured to provide an output signal from one of the primary fiber path and the standby fiber path; and an OTDR port configured to interface OTDR signals to monitor the standby fiber path.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: September 15, 2020
    Assignee: Ciena Corporation
    Inventors: Paul Chedore, Jean-Luc Archambault
  • Patent number: 10756821
    Abstract: An optical device having a self-repair component capable of curing a defective component(s) is disclosed. To improve reliability as well as manufacturing yield, a photonic integrated circuit (“PIC”) for as a multi-channel optical line terminal (“OLT”) contains spare lasers or standby lasers configured to replace a failed laser(s). In one aspect, PIC includes a set of fixed-wavelength lasers (“FWLs”), a tunable-wavelength auxiliary laser (“TWAL”), a photonic detector, and a tuner. FWLs, for example, generate optical wavelengths representing optical signals. TWAL generates an optical signal with a spectrum of wavelengths based on a setting generated by the tuner. The photonic detector detects a defective wavelength. The tuner adjusts output wavelength of TWAL in response to the defective wavelength. Alternatively, PIC includes a working laser array, standby laser array, and spare laser array capable of providing two-layer laser defective protections.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: August 25, 2020
    Assignee: Calix, Inc.
    Inventors: Gilbert Levesque, Nirmal S. Virdee
  • Patent number: 10742322
    Abstract: A format of an Infrared (IR) transmission from an IR remote is matched to a corresponding IR protocol format for a starting sequence associated with the transmission. Next, a format of a payload that follows the starting sequence in the transmission is matched to a payload format associated with the matched protocol format. Assuming both the starting sequence and the payload formats match, the transmission is relayed and/or replayed over an IR re-transmitter situated in proximity to an IR-enabled device associated with the IR remote, and the IR-enabled device processes a command represented in the payload of the transmission. When either the starting sequence fails to match a supported IR protocol or the payload format fails to match a given supported IR protocol, the transmission is ignored and discarded as unverified.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: August 11, 2020
    Assignee: NCR Corporation
    Inventors: Jeremy Cyle Taylor, Mustafa Abdulelah, Nicholas Caine, John Tatum Dyal, Andrew Klenzak, Brian Patrick Rogers, Sergio Silva, Andrew J. Wurfel