Patents Examined by Omar S Ismail
  • Patent number: 10498448
    Abstract: Techniques for transmitting an optical signal through optical fiber with an improved cost effective stimulated Brillouin scattering (SBS) suppression include externally modulating a light beam emitted from a light source with a high frequency signal. The light beam is also modulated externally with an RF information-carrying signal. The high frequency signals are at least twice a highest frequency of the RF signal. The high frequency signals modulating the light source can be gain and phase adjusted by the first set of gain and phase control circuit to achieve a targeted spectrum shape. The adjusted high frequency signals then are split, providing a portion of the split signals to modulate the light source and another portion of the split signals to the second set of phase and gain control circuit for adjusting a phase/gain.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: December 3, 2019
    Assignee: ARRIS Enterprises LLC
    Inventor: Jun Wang
  • Patent number: 10491297
    Abstract: Multiple luminaires are mounted contiguously in a plane, along a straight line or following a one or two dimensional contour, but with a visible periphery between each adjacent pair. A different signal is embedded into the visible illumination emitted by each luminaire, which an image processing module can detect from one or more images captured by a camera. An angle-dependent mask is arranged to cover at least the periphery between adjacent luminaires, such that an appearance of the periphery when viewed from the environment through the mask varies as a function of viewing angle, becoming less visible at greater values of viewing angle (being the angle between a corresponding viewing direction and a normal to the plane, line or contour). The image processing module distinguishes between the different signals based on the periphery being visible when captured from less than a predetermined value of the viewing angle.
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: November 26, 2019
    Assignee: SIGNIFY HOLDING B.V.
    Inventors: Stephanus Joseph Johannes Nijssen, Frederik Jan De Bruijn, Gerardus Cornelis Petrus Lokhoff, Peter Hoekstra, Benjamin Johannes Vos, Onno Martin Janssen
  • Patent number: 10491322
    Abstract: A wavelength division multiplexed (WDM) reconfigurable optical switch. The switch has a set of arrays of optical beam connections, each comprising an array of optical outputs and having an optical input to receive a WDM input optical signal; a first diffractive element to demultiplexed the WDM input optical signal into a plurality of demultiplexed optical input beams, and to disperse said demultiplexed optical input beams spatially along a first axis; first relay optics between the set of arrays of optical beam connections and the first diffractive element; and a reconfigurable holographic array comprising a 2D array of reconfigurable sub-holograms defining sub-hologram rows and columns. The arrays of said set of arrays and the sub-hologram rows and columns are arranged and aligned in particular ways so that wavelength channels of the WDM input signal for each array can be steered within the device towards a selected optical output.
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: November 26, 2019
    Assignee: Roadmap Systems Ltd
    Inventors: Brian Robertson, Daping Chu, Haining Yang, Peter John Wilkinson
  • Patent number: 10469174
    Abstract: Provided is an anti-interference semiconductor device for an optical transceiver. The semiconductor device includes: a back metallization layer, a p++ bearing wafer layer, a P-type epitaxial layer, an isolation layer and a metal layer arranged from bottom to top. The back metallization layer serves as a substrate, on which the p++ bearing wafer layer is formed. The P-type epitaxial layer is formed on the p++ bearing wafer layer. The metal layer is formed on the isolation layer. The semiconductor device includes at least two N-type heavily doped grooves, two P-type heavily doped grooves and a plurality of deep through-silicon vias, which are formed in the P-type epitaxial layer and the isolation layer. The deep through-silicon vias are distributed and divided into at least two rows. The N-type heavily doped grooves and the P-type heavily doped grooves are alternately arranged at two sides of the deep through-silicon vias.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: November 5, 2019
    Assignee: WINGCOMM CO. LTD.
    Inventor: Yun Bai
  • Patent number: 10461850
    Abstract: Frequency synthesis-based optical frequency domain reflectometry method and system are disclosed. The method is to implement optical frequency reflectometry and comprises: performing an electro-optic modulation and an acousto-optic modulation on a local light to obtain an optical pulse; inputting the optical pulse as a detection pulse optical signal to a test optical fiber; and detecting an obtained Rayleigh backscattered optical signal under coherent detection with the local light, and then performing a photoelectric conversion and a demodulation, wherein: the electro-optic modulation is performed by using a single frequency signal; the acousto-optic modulation is performed by using a pulse signal; and the optical pulse is obtained by simultaneously sweeping multiple frequency components of an optical comb signal which is obtained by the electro-optic modulation.
    Type: Grant
    Filed: January 5, 2016
    Date of Patent: October 29, 2019
    Assignees: SHANGHAI JIAOTONG UNIVERSITY, NEUBREX CO., LTD.
    Inventors: Zuyuan He, Qingwen Liu, Xinyu Fan, Dian Chen
  • Patent number: 10461852
    Abstract: A system comprises a trunk submarine cable, an offshore optical and power switching unit connected to the trunk submarine cable, and a plurality of feeder submarine cables connected to the offshore switching unit. The offshore switching unit is configured to dynamically connect data communication channels of a selected feeder submarine cable among the plurality of feeder submarine cables with data communication channels of the trunk submarine cable and to reconfigure power in the case of power faults.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: October 29, 2019
    Assignee: Facebook, Inc.
    Inventors: Stephen Gregory Grubb, Timothy Edward Stuch, Andrew James Palmer-Felgate
  • Patent number: 10454582
    Abstract: A transmission system includes: an optical transmission module capable of modulating a first digital radio signal in order to obtain a first optical signal; an optical reception module capable of receiving a second optical signal and demodulating same in order to obtain a demodulated radio signal; and a digitizing module capable of digitizing the demodulated radio signal in order to obtain a second digital radio signal. The transmission module includes: a module for adding a first management signal to the first digital radio signal, the rate of the first management signal being less than that of the first digital radio signal. The optical digitizing module includes an extraction module capable of extracting a second management signal from the demodulated radio signal, the rate of the second management signal being less than that of the second digital radio signal.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: October 22, 2019
    Assignee: ORANGE
    Inventors: Anna Pizzinat, Philippe Chanclou
  • Patent number: 10454591
    Abstract: An embodiment includes a track and hold amplifier device. A device may include an emitter follower transistor coupled to each of an input and an output. The device may also include a charging node coupled between the output and a voltage supply, wherein the charging node is also coupled to the input via the emitter follower transistor. Further, the device may include a cascode switch coupled to each of the input and the output. The cascode switch may be configured to cause the emitter follower transistor to operate in a conductive state and charge the charging node during a track mode. The cascode switch may also be configured to cause the emitter follower transistor to operate in a non-conductive state to isolate the charging node from the input during a hold mode. The cascode switch may include a MOS-HBT transistor combination operating in class AB mode.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: October 22, 2019
    Assignee: FINISAR CORPORATION
    Inventors: Sorin Petre Voinigescu, Konstantinos Vasilakopoulos
  • Patent number: 10454441
    Abstract: In conventional optical receivers the dynamic range is obtained by using variable gain amplifiers (VGA) with a fixed trans-impedance amplifier (TIA) gain. To overcome the SNR problems inherent in conventional receivers an improved optical receiver comprises an automatic gain control loop for generating at least one gain control signal for controlling gain of both the VGA and the TIA. Ideally, both the resistance and the gain of the TIA are controlled by a gain control signal.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: October 22, 2019
    Assignee: Elenion Technologies, LLC
    Inventors: Mostafa Ahmed, Alexander Rylyakov
  • Patent number: 10451905
    Abstract: An embodiment includes an optical transmission module, an optical transceiver, and an optical communication system including the same, the optical transmission module comprising: a light emitting diode; and an optical modulator for modulating first light emitted from the light emitting diode, wherein the light emitting diode and the optical modulator include GaN, and the optical modulator transmits the first light therethrough when a voltage is applied.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: October 22, 2019
    Assignee: Industry-University Cooperation Foundation Hanyang University Erica Campus
    Inventors: Jong In Shim, Dong Soo Shin, Won Jin Choi
  • Patent number: 10454587
    Abstract: Parallel optical transponders with an optical comb source, and methods of using the same, are provided. The optical comb source can provide multiple optical carriers from a single source. The multiple optical carriers can be phase-aligned, which can allow joint processing of a received signal. The multiple optical carriers can also allow for modulating a demultiplexed data signal using multiple modulators rather than modulating the entire data signal using a single modulator.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: October 22, 2019
    Assignee: Google LLC
    Inventors: Rene Schmogrow, Vinayak Dangui
  • Patent number: 10454578
    Abstract: A coded visible light receiver comprises: a sensor, a transform module, and an interference cancelling module. The sensor receives light comprising data modulated into the light according to a coding scheme. The transform module is configured to transform the data into a frequency domain representation, representing a band of a spectrum resulting from the data being modulated into the light according to the coding scheme. The interference cancelling module is configured to cancel interference occurring in the band of the data, by determining one or more components in the band that exceed a threshold signal strength and cancelling those components.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: October 22, 2019
    Assignee: SIGNIFY HOLDING B.V.
    Inventors: Constant Paul Marie Jozef Baggen, Paul Henricus Johannes Maria Van Voorthuisen, Erik Witberg, Hongming Yang
  • Patent number: 10453971
    Abstract: A new technique for sensing optical cavity mode mismatch using a mode converter formed from a cylindrical lens mode converting telescope, radio frequency quadrant photodiodes (RFQPDs), and a heterodyne detection scheme. The telescope allows the conversion of the Laguerre-Gauss basis to the Hermite-Gauss (HG) basis, which can be measured with quadrant photodiodes. Conversion to the HG basis is performed optically, measurement of mode mismatched signals is performed with the RFQPDs, and a feedback error signal is obtained with heterodyne detection.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: October 22, 2019
    Assignee: SYRACUSE UNIVERSITY
    Inventors: Fabian MagaƱa-Sandoval, Stefan Ballmer, Thomas Vo, Daniel Vander-Hyde, Jax Sanders
  • Patent number: 10447422
    Abstract: In some embodiments, an apparatus includes a first optical transceiver. The first optical transceiver includes a set of optical transmitters, an optical multiplexer operatively coupled to the set of optical transmitters, and a variable optical attenuator operatively coupled to the optical multiplexer. The variable optical attenuator is configured to receive a control signal from a controller of the first optical transceiver and modulate a signal representing control information with an output from the optical multiplexer. The control information is associated with the control signal and for a second optical transceiver operatively coupled to the first optical transceiver.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: October 15, 2019
    Assignee: Juniper Networks, Inc.
    Inventors: Roberto Marcoccia, Theodore J. Schmidt, George R. Sosnowski, Christian Malouin
  • Patent number: 10447397
    Abstract: A fiber-optic communication system for an aircraft including: a light source operable to generate light; a transceiver in optical communication with the light source, the transceiver including a control input and a reflector; an optical fiber in optical communication with the transceiver; and a light detector in optical communication with the optical fiber. The transceiver is operable to generate an amplitude modulated light signal by selectively reflecting the light received from the light source into the optical fiber using the reflector according to information received at the control input. The light detector is operable to receive the amplitude modulated light signal from the optical fiber and to detect an amplitude of the amplitude modulated light signal to extract the information.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: October 15, 2019
    Assignee: Airbus Operations Limited
    Inventors: Kayvon Barad, Alessio Cipullo
  • Patent number: 10447389
    Abstract: Methods according to the disclosure include methods for managing data flow in an optical communications system having a plurality of vertical cavity surface emitting lasers (VCSELs). The method generally includes determining whether operation of the system exceeds a thermal threshold for a thermal parameter of the system, and switching from a first data bandwidth to a second data bandwidth when the thermal threshold is exceeded. Operation at the second data bandwidth further includes determining whether further operation of the system demands the first data bandwidth, and resuming operation of the system at the first data bandwidth only when the thermal parameter during operation at the second data bandwidth does not exceed the thermal threshold.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: October 15, 2019
    Assignees: GLOBALFOUNDRIES INC., International Business Machines Corporation
    Inventors: Hayden C. Cranford, Jr., Jonathan E. Proesel, Rashmi R. Bindu
  • Patent number: 10447393
    Abstract: The present disclosure provides a vehicle-mounted visible light emission system and reception system and a communication network. The vehicle-mounted visible light emission system comprises: a vehicle information acquisition unit configured to acquire vehicle information to be transmitted; a processing unit configured to process the vehicle information acquired by the vehicle information acquisition unit; and a visible light emission unit configured to transmit a visible light signal in a manner of switching between dimming and brightening over time based on the processed vehicle information.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: October 15, 2019
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Kairan Liu, Xinguo Li
  • Patent number: 10436990
    Abstract: Methods and systems for two-dimensional mode-matching grating couplers may include in a photonic chip comprising a grating coupler at a surface of the photonic chip, the grating coupler having increased scattering strength in a direction of a light wave traveling through the grating coupler: receiving an optical signal from a first direction within the photonic chip; and scattering the optical signal out of the surface of the photonic chip. A second optical signal may be received in the grating coupler from a second direction within the photonic chip. The second optical signal may be scattered out of the surface of the photonic chip. The increasing scattering strength may be configured by increased width scatterers along a direction perpendicular to the direction of light travel. The increased scattering strength may be configured by a transition of shapes of scatterers in the grating coupler.
    Type: Grant
    Filed: April 19, 2018
    Date of Patent: October 8, 2019
    Assignee: Luxtera, Inc.
    Inventors: Roman Bruck, Attila Mekis
  • Patent number: 10439723
    Abstract: The present disclosure provide for a radio frequency over glass (RFoG) system having an optical node and an RFoG extender residing in a first service area coupled to the optical node. The RFoG functions to transmit an upstream (US) radio frequency (RF) signal to a head end, receive a downstream (DS) RF signal from the head end and extend the DS RF signal to the second service area. The second service area is different from the first service area and the second service area is remote from the first service area.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: October 8, 2019
    Assignee: ARRIS Enterprises LLC
    Inventor: Joaquin Beas Bujanos
  • Patent number: 10432308
    Abstract: A system described herein includes a ground based gateway subsystem configured to transmit an RF feeder uplink beam to a satellite, and a space based subsystem of the satellite configured to receive the RF feeder uplink beam and produce in dependence thereon an optical ISL beam that is transmitted to another satellite. The ground based gateway subsystem can include a ground based beamformer used to produce the RF feeder uplink beam. The optical ISL beam, produced by the space based subsystem and transmitted to the other satellite, can comprise a wavelength division multiplexed optical signal having RF frequencies within a same specified RF frequency range within which the other satellite is configured to transmit a plurality of RF service downlink beams, thereby eliminating any need for the other satellite to perform any frequency conversions when producing the plurality of RF service downlink beams in dependence on the optical ISL beam.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: October 1, 2019
    Assignee: Space Systems/Loral, LLC
    Inventors: Ghislain Turgeon, Vijaya Gallagher