Transmitter And Receiver System Patents (Class 398/140)
  • Patent number: 11902720
    Abstract: An optical line terminal (OLT) operating within a multi-rate PON is configured to perform downstream timeslot scheduling among an associated number of ONUs so as to minimize the change in information rate from one scheduled ONU timeslot to the next. In this manner, the clock recovery component at each ONU is best able to follow the change in information rates, remaining locked on the system clock regardless of the specific implementation of the clock and data recovery (CDR) functionality at a given ONU. The OLT may schedule timeslot assignments that span a pair of adjacent parts (referred to as a two-part cycle), with the first part having timeslots assigned from the lowest information rate (e.g., NRZ) to the highest (e.g., PAM4) and the second part's timeslots assigned in the reverse order; that is, from the highest to the lowest information rate.
    Type: Grant
    Filed: March 1, 2022
    Date of Patent: February 13, 2024
    Inventors: Doutje Van Veen, Amitkumar Mahadevan, Vincent Houtsma
  • Patent number: 11901958
    Abstract: Quantum satellite-based global networks are provided. A system as provided herein includes a processor and a memory that stores first executable instructions that, when executed by the processor, facilitate performance of operations, the operations comprising receiving qubits from a quantum sensor device via a quantum communication channel established between the system and the quantum sensor device; providing quantum input data, derived from the qubits, to a quantum machine learning model; and adjusting a property of a communication network based on an output of the quantum machine learning model, produced in response to the providing of the quantum input data, resulting in an increased performance of a mobile application utilizing resources enabled via the communication network.
    Type: Grant
    Filed: May 5, 2022
    Date of Patent: February 13, 2024
    Assignees: AT&T Intellectual Property I, L.P., AT&T Moblity II LLC
    Inventors: Thomas J. Routt, Mark Stockert, Slawomir Stawiarski
  • Patent number: 11870488
    Abstract: Systems and methods include detecting a fast fiber transient on a span based on analyzing power data, wherein the power data is for any of optical wavelengths of traffic channels, optical service channel (OSC) wavelengths, and telemetry from a network element; and responsive to detecting the fast fiber transient, causing an optical time domain reflectometer (OTDR) trace on the span with a specific configuration based on the fast fiber transient.
    Type: Grant
    Filed: February 25, 2022
    Date of Patent: January 9, 2024
    Assignee: Ciena Corporation
    Inventors: Choudhury A. Al Sayeed, Lorenzo Lepore
  • Patent number: 11831569
    Abstract: A system and method for transmitting data ultrasonically through biological tissue employs a network of a plurality of nodes, at least a portion of the nodes implantable within the biological tissue. At least one implanted node includes a transmitter having an orthogonal frequency division multiplex signal generator to encode an ultrasonic signal for transmission through the biological tissue to an ultrasonic receiver at another node.
    Type: Grant
    Filed: January 11, 2022
    Date of Patent: November 28, 2023
    Assignee: Northeastern University
    Inventors: Tommaso Melodia, Giuseppe Enrico Santagati
  • Patent number: 11817900
    Abstract: A mobile system (1,11) comprises a camera (3) and at least one processor (5). The at least one processor is configured to capture an image with the camera, e.g. of a light beacon (15), to determine whether a certain object is recognized in the captured image, e.g. by querying a database (19), and to start detecting and/or decoding data being communicated via visible light in dependence on the certain object being recognized.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: November 14, 2023
    Assignee: SIGNIFY HOLDING B.V.
    Inventors: Dzmitry Viktorovich Aliakseyeu, Bartel Marinus Van De Sluis, Dirk Valentinus René Engelen
  • Patent number: 11799836
    Abstract: Quantum mechanics provides several features useful for datacenter networking. The no cloning theorem, which states that it is impossible to mate a duplicate of an arbitrary, unknown quantum state, can be used to detect eavesdroppers. Entanglement allows two parties to have common knowledge of a shared state. These properties are being used today for quantum key exchange and quantum computing, but they are currently too expensive for general use. Fortunately, we can use classical mechanisms to get a close enough approximation of these quantum properties to solve some important problems in distributed computing. Nothing we describe here is quantum mechanical. Rather, we show that it is possible to use classical mechanisms to emulate some properties of quantum mechanics, which enable us to address interesting problems in distributed computing. The engineering insight, is that we can get closer to achieving these properties than might be expected through conventional thinking.
    Type: Grant
    Filed: October 30, 2021
    Date of Patent: October 24, 2023
    Inventor: Eric Litak
  • Patent number: 11750287
    Abstract: An optical Digital Signal Processor (DSP) circuit includes a digital core configured to implement digital signal processing functionality and configured to operate at a plurality of baud rates including a full baud rate and a half-baud rate; and an analog interface including a Digital-to-Analog Converter (DAC) section and an Analog-to-Digital Converter (ADC) section, wherein the analog interface is connected to the digital core and is configured to operate at the full baud rate when the digital core is configured to operate at any of the plurality of baud rates.
    Type: Grant
    Filed: May 25, 2021
    Date of Patent: September 5, 2023
    Assignee: Ciena Corporation
    Inventors: Sadok Aouini, Robert G. Gibbins, Yalmez Yazaw, Harvey Mah, Naim Ben-Hamida
  • Patent number: 11741388
    Abstract: The disclosure describes aspects of using multiple species in trapped-ion nodes for quantum networking. In an aspect, a quantum networking node is described that includes multiple memory qubits, each memory qubit being based on a 171Yb+ atomic ion, and one or more communication qubits, each communication qubit being based on a 138Ba+ atomic ion. The memory and communication qubits are part of a lattice in an atomic ion trap. In another aspect, a quantum computing system having a modular optical architecture is described that includes multiple quantum networking nodes, each quantum networking node including multiple memory qubits (e.g., based on a 171Yb+ atomic ion) and one or more communication qubits (e.g., based on a 138Ba+ atomic ion). The memory and communication qubits are part of a lattice in an atomic ion trap. The system further includes a photonic entangler coupled to each of the multiple quantum networking nodes.
    Type: Grant
    Filed: December 23, 2022
    Date of Patent: August 29, 2023
    Assignee: UNIVERSITY OF MARYLAND, COLLEGE PARK
    Inventors: Christopher Monroe, Martin Lichtman, Ismail Volkan Inlek, Clayton Crocker, Ksenia Sosnova
  • Patent number: 11736203
    Abstract: A system and method for radio frequency (RF) signal processing via photonic local oscillator (LO) phase control generates a set of N optical carriers and M sets of control inputs, each control input including an amplitude and/or phase control for the nth carrier. Each nth optical carrier is split into an RF path and M LO paths, the RF path including N electro-optical (EO) modulators for amplitude/phase modulation of each nth carrier per a set of N RF input signals and each mth LO path including a set of N EO modulators for amplitude/phase modulation of each nth carrier per the mth control input. Demodulators generate M in-phase and quadrature (I/Q) balanced optical outputs based on the multiplexed N combined RF optical outputs and each mth set of N combined LO optical outputs. The M I/Q balanced optical outputs are converted to the electrical and then to the digital domain.
    Type: Grant
    Filed: June 27, 2022
    Date of Patent: August 22, 2023
    Assignee: Rockwell Collins, Inc.
    Inventors: Ronald D. Esman, Daniel J. Esman
  • Patent number: 11736205
    Abstract: An asymmetric bidirectional optical wireless communication system based on orbital angular momentum comprises a system end device and a client end device. The system can split light into P-polarization beam and S-polarization beam, and utilize the orbital angular momentum multiplexing technology to increase the system capacity for uplink transmission in the client end device. In addition, the system also uses the combination of a beam homogenizer and a spatial light modulator to design an orbital angular momentum multiplexer with low energy loss, which can increase the number of orbital angular momentum channels by increasing the effective area of the components.
    Type: Grant
    Filed: April 29, 2022
    Date of Patent: August 22, 2023
    Assignee: NATIONAL TAIWAN UNIVERSITY OF SCIENCE AND TECHNOLO
    Inventors: Hsi-Hsir Chou, Kang-Yun Liu
  • Patent number: 11710390
    Abstract: A computer-implemented event statistic generation method for intrusion detection comprises processing a plurality of return signals from a coherent optical time domain reflectometer into time domain signals for each of a plurality of sensor bins, the plurality of return signals corresponding to a plurality of stimulation pulses injected into an optical sensor fiber during a time period.
    Type: Grant
    Filed: June 3, 2022
    Date of Patent: July 25, 2023
    Assignee: AVA RISK GROUP LIMITED
    Inventors: Seedahmed Mahmoud, Alaster Meehan, Brian Bourke
  • Patent number: 11646813
    Abstract: A digital receiver is configured to process a polarization multiplexed carrier from a communication network. The polarization multiplexed carrier includes a first polarization and a second polarization. The receiver includes a first lane for transporting a first input signal of the first polarization, a second lane for transporting a second input signal of the second polarization, a dynamic phase noise estimation unit disposed within the first lane and configured to determine a phase noise estimate of the first input signal, a first carrier phase recovery portion configured to remove carrier phase noise from the first polarization based on a combination of the first input signal and a function of the determined phase noise estimate, and a second carrier phase recovery portion configured to remove carrier phase noise from the second polarization based on a combination of the second input signal and the function of the determined phase noise estimate.
    Type: Grant
    Filed: August 24, 2021
    Date of Patent: May 9, 2023
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Zhensheng Jia, Junwen Zhang, Mu Xu, Haipeng Zhang, Luis Alberto Campos, Curtis Dean Knittle
  • Patent number: 11621740
    Abstract: Systems and methods for operating a communication device. The methods comprise: receiving a carrier signal modulated with a modulation signal comprising a symbol conveyed in a symbol timing window; determining an energy value for each timeslot in the symbol timing window; combining the energy values to determine a combined energy value for each bit of the symbol in a manner in which the combined energy value is penalized if more than one timeslot of the symbol timing window comprises energy contained in the carrier signal; and generating a soft value for each bit of the sequence of bits by combining the combined energy value with a weight value, where the weight value is selected from a plurality of weight values based on a number of timeslots in the symbol timing window which comprises energy contained in the carrier signal.
    Type: Grant
    Filed: November 11, 2021
    Date of Patent: April 4, 2023
    Assignee: L3HARRIS TECHNOLOGIES, INC.
    Inventors: L. Carl Christensen, Ihab Francis
  • Patent number: 11562279
    Abstract: An apparatus includes a plurality of processing layers coupled in series. Each processing layer in the plurality of processing layers includes a Gaussian unit configured to perform a linear transformation on an input signal including a plurality of optical modes. The Gaussian unit includes a network of interconnected beamsplitters and phase shifters and a plurality of squeezers operatively coupled to the network of interconnected beamsplitters and phase shifters. Each processing layer also includes a plurality of nonlinear gates operatively coupled to the Gaussian unit and configured to perform a nonlinear transformation on the plurality of optical modes. The apparatus also includes a controller operatively coupled to the plurality of processing layers and configured to control a setting of the plurality of processing layers.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: January 24, 2023
    Assignee: Xanadu Quantum Technologies Inc.
    Inventors: Nathan Killoran, Thomas R. Bromley, Juan Miguel Arrazola, Maria Schuld, Nicolas Quesada
  • Patent number: 11493608
    Abstract: A LIDAR device for scanning a scanning angle using at least one beam includes at least one beam source generating the at least one beam, a rotatable deflection unit deflecting the at least one beam, and a detector receiving the at least one beam after reflection on an object, where at least two cylindrical lenses are situated in a beam path of the at least one beam between the beam source and the deflection unit, at least one cylindrical lens is rotatable.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: November 8, 2022
    Assignee: Robert Bosch GmbH
    Inventors: Matthias Baier, Annemarie Holleczek
  • Patent number: 11437368
    Abstract: A multi-level semiconductor device, the device including: a first level including integrated circuits; a second level including a structure designed to conduct electromagnetic waves, where the second level is disposed above the first level, where the first level includes crystalline silicon; and an oxide layer disposed between the first level and the second level, where the second level is bonded to the oxide layer, and where the bonded includes oxide to oxide bonds.
    Type: Grant
    Filed: April 10, 2022
    Date of Patent: September 6, 2022
    Assignee: MONOLITHIC 3D INC.
    Inventors: Zvi Or-Bach, Deepak C. Sekar, Brian Cronquist
  • Patent number: 11387894
    Abstract: A satellite receiver includes: N reception antenna elements; N demultiplexing units; a correlation detection unit configured to perform correlation processing on each of reception signals demultiplexed by the N demultiplexing units with a reception antenna element that receives the highest power being set as a reference element so as to calculate a relative phase difference, and calculate an excitation coefficient for cancelling a phase difference between the N reception antenna elements for each of sub-channels based on the calculated relative phase difference; N phase compensation units configured to multiply the reception signals demultiplexed by the N demultiplexing units, respectively, by the excitation coefficient for each of the sub-channels; and a combiner configured to combine multiplication results from the N phase compensation units for each of the sub-channels to generate output signals.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: July 12, 2022
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hitomi Ono, Akinori Fujimura, Terumi Sunaga, Toshiyasu Tsunoda
  • Patent number: 11373493
    Abstract: A computer-implemented event statistic generation for intrusion detection comprises processing a plurality of return signals from a coherent optical time-domain reflectometer into time-domain signals for each of a plurality of sensor bins, the plurality of return signals corresponding to a plurality of stimulation pulses injected into an optical sensor fiber during a time period. For each sensor bin, transforming the respective time-domain signal into a corresponding frequency-domain signal, calculating, from the respective frequency-domain signal, a first signal power area of a first frequency band expected to contain system noise and a second signal power area of a second frequency band expected to contain any energy related to at least a first event; and generating an event statistic proportional to the ratio of the second signal power area to the first signal power area at least in part by dividing the second signal power area by the first signal power area.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: June 28, 2022
    Assignee: AVA RISK GROUP LIMITED
    Inventors: Seedahmed Mahmoud, Alaster Meehan, Brian Bourke
  • Patent number: 11328216
    Abstract: The disclosure describes aspects of using multiple species in trapped-ion nodes for quantum networking. In an aspect, a quantum networking node is described that includes multiple memory qubits, each memory qubit being based on a 171Yb+ atomic ion, and one or more communication qubits, each communication qubit being based on a 138Ba+ atomic ion. The memory and communication qubits are part of a lattice in an atomic ion trap. In another aspect, a quantum computing system having a modular optical architecture is described that includes multiple quantum networking nodes, each quantum networking node including multiple memory qubits (e.g., based on a 171Yb+ atomic ion) and one or more communication qubits (e.g., based on a 138Ba+ atomic ion). The memory and communication qubits are part of a lattice in an atomic ion trap. The system further includes a photonic entangler coupled to each of the multiple quantum networking nodes.
    Type: Grant
    Filed: January 8, 2021
    Date of Patent: May 10, 2022
    Assignee: University of Maryland, College Park
    Inventors: Christopher Monroe, Martin Lichtman, Ismail Volkan Inlek, Clayton Crocker, Ksenia Sosnova
  • Patent number: 11281597
    Abstract: Embodiments of the present disclosure are directed toward a universal serial bus (USB) device and a USB host controller. The USB device and USB host controller may be configured to couple to one another via a USB link that may include a high-speed data line and a low-speed data line. The USB device may then transmit, via the high-speed data line, an indication of a digital image to the USB host controller. Other embodiments may be described and/or claimed.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: March 22, 2022
    Assignee: Intel Corporation
    Inventors: Huimin Chen, Karthi R. Vadivelu, Abdul R. Ismail, Raul Gutierrez
  • Patent number: 11159241
    Abstract: Devices, methods for analog-to-digital converters (ADCs) that perform high-dynamic range measurements based on optical techniques are disclosed. In one example aspect, an optical encoder includes a polarization rotator configured to receive a train of optical pulses, and an electro-optic (EO) modulator coupled to an output of the polarization rotator. The EO modulator is configured to receive a radio frequency (RF) signal and to produce a phase modulated signal in accordance with the RF signal. The optical encoder also includes a polarizing beam splitter coupled to the output of the EO modulator; and an optical hybrid configured to receive two optical signals from the polarizing beam splitter and to produce four optical outputs that are each phase shifted with respect to one another.
    Type: Grant
    Filed: May 11, 2020
    Date of Patent: October 26, 2021
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Peter Thomas Setsuda DeVore, Apurva Shantharaj Gowda, David Simon Perlmutter, Alexander Thomas Wargo, Jason Thomas Chou
  • Patent number: 11153016
    Abstract: A device including an optoelectric circuit that is configured to provide galvanic isolation between a first circuit and a second circuit is disclosed. The optoelectric circuit includes at least one non-inverting buffer and a metal semiconductor diode. The at least one non-inverting buffer is positioned between a collector of a phototransistor and an anode of a light emitting diode. The metal semiconductor diode is positioned between the collector of the phototransistor and the at least one non-inverting buffer.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: October 19, 2021
    Assignee: INTERDIGITAL CE PATENT HOLDINGS, SAS
    Inventors: Philippe Marchand, Claude Fouque, Frederique Salou
  • Patent number: 11128379
    Abstract: [Problem] To accommodate single-band signal processing devices in a high-density manner. [Solution] Provided is a system including: a first signal cable; a second signal cable; a third signal cable; a fourth signal cable; a first multi-band signal processing device that processes a first signal input from the first signal cable and outputs a resultant second signal to the second signal cable; a second multi-band signal processing device that processes a third signal input from the third signal cable and outputs a resultant fourth signal to the fourth signal cable; a first joint box that accommodates the first signal cable, the first multi-band signal processing device, the second signal cable, and the fourth signal cable; and a second joint box that accommodates the second signal cable, the third signal cable, the second multi-band signal processing device, and the fourth signal cable.
    Type: Grant
    Filed: February 20, 2017
    Date of Patent: September 21, 2021
    Assignee: NEC CORPORATION
    Inventor: Koji Inada
  • Patent number: 11125773
    Abstract: A method includes sending a probe beam into a beam path that induces a lateral displacement to the probe beam. The probe beam includes a plurality of orthogonal spatial modes that are entangled with each other. The method also includes measuring a phase of each spatial mode from the plurality of orthogonal spatial modes in the probe beam at a detector disposed within a near field propagation regime of the probe beam. The method also includes estimating the lateral displacement of the probe beam based on a phase of each spatial mode from the plurality of spatial modes in the probe beam after the beam path.
    Type: Grant
    Filed: July 7, 2020
    Date of Patent: September 21, 2021
    Assignee: Xanadu Quantum Technologies Inc.
    Inventors: Saikat Guha, Haoyu Qi
  • Patent number: 11121776
    Abstract: A faceplate pluggable remote laser source and system incorporating such a laser source. The system may include an enclosure having a faceplate; a first optical connector, in the faceplate; a laser module; and a loopback fiber cable, connected between the laser module and the first optical connector. The faceplate may form an exterior boundary of the enclosure. The laser module may have a first end including an electrical interface, and a second end including an optical interface. The first end of the laser module may be engaged in a receptacle in the faceplate, and the second end of the laser module may extend outside the faceplate. The laser module may be configured to receive electrical power through the electrical interface, and to produce unmodulated light at the optical interface. The loopback fiber cable and the first optical connector may be configured to route the unmodulated light back into the enclosure.
    Type: Grant
    Filed: August 7, 2020
    Date of Patent: September 14, 2021
    Assignee: Rockley Photonics Limited
    Inventors: Steve Akwaa Aboagye, David Arlo Nelson, Cyriel Johan Agnes Minkenberg, Rajagopal Krishnaswamy
  • Patent number: 11112481
    Abstract: An apparatus for calibrating a differential circuit that includes a differential integrator having an input, a gain, and an output connected to a comparator. The differential integrator output is chargeable to a threshold prior to an integration period. The differential integrator integrates the input during the integration period such that the differential integrator output goes toward zero from the threshold. The comparator detects the output of the differential integrator reaching zero. The apparatus includes a closed-loop gain trim circuit to perform a coarse calibration to adjust and set the gain of the differential integrator and a reference generator that generates the threshold to which the differential integrator output is pre-charged. The reference generator is trimmable during a fine calibration to adjust and set the threshold to correct for residual gain error in the differential circuit remaining after the coarse calibration is performed.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: September 7, 2021
    Assignee: Cirrus Logic, Inc.
    Inventors: Sarang Vadnerkar, Vinod Jayakumar
  • Patent number: 11108490
    Abstract: A digital receiver is configured to process a polarization multiplexed carrier from a communication network. The polarization multiplexed carrier includes a first polarization and a second polarization. The receiver includes a first lane for transporting a first input signal of the first polarization, a second lane for transporting a second input signal of the second polarization, a dynamic phase noise estimation unit disposed within the first lane and configured to determine a phase noise estimate of the first input signal, a first carrier phase recovery portion configured to remove carrier phase noise from the first polarization based on a combination of the first input signal and a function of the determined phase noise estimate, and a second carrier phase recovery portion configured to remove carrier phase noise from the second polarization based on a combination of the second input signal and the function of the determined phase noise estimate.
    Type: Grant
    Filed: January 9, 2020
    Date of Patent: August 31, 2021
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Zhensheng Jia, Junwen Zhang, Mu Xu, Haipeng Zhang, Luis Alberto Campos, Curtis Dean Knittle
  • Patent number: 11101883
    Abstract: In an optical communications network, the supervisory control signal is duplicating at the OSI layer 2 or layer 3 level to generate a primary supervisory control signal and a secondary supervisory control signal. Access to the primary supervisory control signal is enabled at a network interface of a network device. In response to detecting a failure of the optical communications network or the device, access to the primary supervisory control signal is disabled and access to the secondary supervisory control signal is enabled.
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: August 24, 2021
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Yawei Yin, Jamie Gaudette, Lihua Yuan
  • Patent number: 11093215
    Abstract: Photonic processors are described. The photonic processors described herein are configured to perform matrix-matrix (e.g., matrix-vector) multiplication. Some embodiments relate to photonic processors arranged according to a dual-rail architecture, in which numeric values are encoded in the difference between a pair optical signals (e.g., in the difference between the powers of the optical signals). Relative to other architectures, these photonic processors exhibit increased immunity to noise. Some embodiments relate to photonic processors including modulatable detector-based multipliers. Modulatable detectors are detectors designed so that the photocurrent can be modulated according to an electrical control signal. Photonic processors designed using modulatable detector-based multipliers are significantly more compact than other types of photonic processors.
    Type: Grant
    Filed: November 20, 2020
    Date of Patent: August 17, 2021
    Assignee: Lightmatter, Inc.
    Inventors: Nicholas C. Harris, Darius Bunandar, Michael Gould, Carl Ramey, Shashank Gupta, Carlos Dorta-Quinones
  • Patent number: 11075694
    Abstract: A network or system in which a hub or primary node may communicate with a plurality of leaf or secondary nodes. The hub node may operate or have a capacity greater than that of the leaf nodes. Accordingly, relatively inexpensive leaf nodes may be deployed to receive data carrying optical signals from, and supply data carrying optical signals to, the hub node. One or more connections may couple each leaf node to the hub node, whereby each connection may include one or more spans or segments of optical fibers, optical amplifiers, optical splitters/combiners, and optical add/drop multiplexer, for example. Optical subcarriers may be transmitted over such connections, each carrying a data stream. The subcarriers may be generated by a combination of a laser and a modulator, such that multiple lasers and modulators are not required, and costs may be reduced.
    Type: Grant
    Filed: September 22, 2019
    Date of Patent: July 27, 2021
    Assignee: Infinera Corporation
    Inventors: Jeffrey T. Rahn, Kuang-Tsan Wu, Steven J. Hand, David F. Welch
  • Patent number: 11057117
    Abstract: An apparatus is described which uses directly modulated InGaN Light-Emitting Diodes (LEDs) or InGaN lasers as the transmitters for an underwater data-communication device. The receiver uses automatic gain control to facilitate performance of the apparatus over a wide-range of distances and water turbidities.
    Type: Grant
    Filed: August 13, 2020
    Date of Patent: July 6, 2021
    Assignee: Magseis FF LLC
    Inventor: Philip Lacovara
  • Patent number: 11028688
    Abstract: To optimize the efficiency and reliability of downhole data transmissions, an optical splash communication system may be utilized. A downhole tool may include an optical splash communication system that comprises multiple electrical elements where the electrical elements communicate with each other by transmitting and receiving via free space an optical splash signal through an inner space of the downhole tool. The electrical elements may comprise or be coupled to a light source and a detector. Multiple optical splash communication systems may be deployed in multiple downhole tools such that each downhole tool may communicate with another downhole tool via an opening, for example, a transparent sealed window, between the downhole tools. The opening is sufficient to permit transmissions to occur even when the downhole tools are rotated independently of each other.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: June 8, 2021
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Casey Giron, Wolfgang Hartmut Nitsche, John Laureto Maida
  • Patent number: 10992384
    Abstract: A method of processing a visible light communication (VLC) signal using a single-photon avalanche diode (SPAD) includes detecting photons of a VLC signal at a SPAD detector, counting the photons detected by the SPAD detector to generate a combined VLC signal comprising a data signal and an ambient signal, extracting the ambient signal from the combined VLC signal, subtracting the ambient signal from the combined VLC signal to generate the data signal, and outputting the data signal as a bitstream.
    Type: Grant
    Filed: December 30, 2019
    Date of Patent: April 27, 2021
    Assignee: STMICROELECTRONICS (RESEARCH & DEVELOPMENT) LIMITED
    Inventors: Ellen Couper, Neale Dutton, Alexios Alexandropoulos
  • Patent number: 10992391
    Abstract: Modulated entangled photon pairs are used to transmit data between a sender and receiver subsystem. The sender subsystem comprises at least one data input, a modulator to modulate the photons, a photon combiner and a transmitter coupler to direct the modulated entangled photon pairs towards a receiver. The receiver subsystem comprises a receiver coupler, a photon de-combiner to direct the photons to polarization analyzers to transmit photons of a specified polarization to detectors, and a processor to record the information transmitted by the detectors. The sender subsystem transmits information to the receiver subsystem through the modulation of the entangled photon state. The present system and method is quantum which provides advantages over classical and optical communications. These advantages include using less power to transmit information, and allowing transmission through and around obstructions and adverse environments.
    Type: Grant
    Filed: March 25, 2020
    Date of Patent: April 27, 2021
    Assignee: The United States of Americas as represented by the Secretary of the Army
    Inventors: Ronald E. Meyers, Keith S. Deacon
  • Patent number: 10958411
    Abstract: Techniques to operate circuitry in an integrated circuit are provided. The circuitry may include rate detection circuitry, receiver circuitry, and configuration circuitry. The receiver circuitry may receive a data stream with an arbitrary data rate. The rate detection circuitry may receive a reference clock signal that is associated with the received data stream. The rate detection circuitry determines the frequency of the reference clock signal such that an appropriate clock signal may be generated for the receiver circuitry. The receiver clock signal may be generated by clock generation circuitry that is coupled to the rate detection circuitry. The configuration circuitry may accordingly configure the receiver circuitry based at least on the determined frequency of the reference clock signal so that the receiver circuitry may operate at the arbitrary data rate.
    Type: Grant
    Filed: April 6, 2020
    Date of Patent: March 23, 2021
    Assignee: Altera Corporation
    Inventors: Boon Hong Oh, Chee Seng Tan, Chau Perng Chin
  • Patent number: 10958342
    Abstract: A method and system for identifying and mitigating interference caused by a rogue transmission source in an Optical Camera Communication (OCC) network is disclosed. The method includes receiving information from a plurality of transmission sources. Each of the plurality of transmission sources is within a capture area of a camera. Each of the plurality of transmission sources comprises a set of light sources configured to display one of a plurality of color codes. The method further includes detecting, through the camera, an interference between a serving transmission source associated with the camera and a non-serving transmission source. The serving transmission source belongs to the plurality of transmission sources. The method further includes establishing the non-serving transmission source as the rogue transmission source, when the non-serving transmission source is not registered with a master coordinator within the OCC network.
    Type: Grant
    Filed: March 31, 2020
    Date of Patent: March 23, 2021
    Assignee: Wipro Limited
    Inventors: Subhas Chandra Mondal, Shailesh Prabhu
  • Patent number: 10938485
    Abstract: Disclosed in some examples are methods, systems, optical devices, and machine readable mediums for utilizing uncertainty ranges along with ECC in power level modulation schemes. Photon counts within the uncertainty ranges are not demultiplexed and the data is recovered later by the ECC algorithm without retransmissions. This improves performance by reducing error rate by changing demultiplexing behavior to take advantage of characteristics in the ECC algorithms.
    Type: Grant
    Filed: April 18, 2019
    Date of Patent: March 2, 2021
    Assignee: Microsoft Technology Licensing, LLC
    Inventor: Amer Aref Hassan
  • Patent number: 10902338
    Abstract: The disclosure describes aspects of using multiple species in trapped-ion nodes for quantum networking. In an aspect, a quantum networking node is described that includes multiple memory qubits, each memory qubit being based on a 171Yb+ atomic ion, and one or more communication qubits, each communication qubit being based on a 138Ba+ atomic ion. The memory and communication qubits are part of a lattice in an atomic ion trap. In another aspect, a quantum computing system having a modular optical architecture is described that includes multiple quantum networking nodes, each quantum networking node including multiple memory qubits (e.g., based on a 171Yb+ atomic ion) and one or more communication qubits (e.g., based on a 138Ba+ atomic ion). The memory and communication qubits are part of a lattice in an atomic ion trap. The system further includes a photonic entangler coupled to each of the multiple quantum networking nodes.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: January 26, 2021
    Assignee: UNIVERSITY OF MARYLAND
    Inventors: Christopher Monroe, Martin Lichtman, Ismail Volkan Inlek, Clayton Crocker, Ksenia Sosnova
  • 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: 10841005
    Abstract: The present invention is directed to communication systems and methods. According to an embodiment, a receiving optical transceiver determines signal quality for signals received from a transmitting optical transceiver. Information related to the signal quality is embedded into back-channel data and sent to the transmitting optical transceiver. The transmitting optical transceiver detects the presence of the back-channel data and adjusts one or more of its operating parameters based on the back-channel data. There are other embodiments as well.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: November 17, 2020
    Assignee: INPHI CORPORATION
    Inventors: Todd Rope, Radhakrishnan L. Nagarajan
  • Patent number: 10651627
    Abstract: Methods, systems, and apparatus, including an optical receiver including an optical source, including a substrate; a laser provided on the substrate, the laser having first and second sides and outputting first light from the first side and second light from the second side, the first light output from the first side of the laser has a first power and the second light output from the second side has a second power; and a first modulator that receives the first light and a second modulator that receives the second light, such that the power of the first light at an input of the first modulator is substantially equal to the power of the second light at an input of the second modulator.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: May 12, 2020
    Assignee: Infinera Corporaton
    Inventors: Peter W. Evans, Jeffrey T. Rahn, Vikrant Lal, Miguel Iglesias Olmedo, Amir Hosseini, Parmijit Samra, Scott Corzine, Ryan W. Going
  • Patent number: 10396903
    Abstract: An improved scheme for sending classical digital data over a quantum channel is presented using path entanglement. The protocol is can detect digital data by the measurement or non-measurement of one entangled channel to signal to the remote station. The remote station is able to resolve the distant measurement by use of an interferometer. No measurement and the entangled state imply an interference effect at the remote station, whereas measurement results in a mixed state and no interference. A disproof of the “No-communication Theorem” is presented. The method applies to both matter and light waves.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: August 27, 2019
    Inventor: Remi Oseri Cornwall
  • Patent number: 10382125
    Abstract: The present invention is directed to communication systems and methods. According to an embodiment, a receiving optical transceiver determines signal quality for signals received from a transmitting optical transceiver. Information related to the signal quality is embedded into back-channel data and sent to the transmitting optical transceiver. The transmitting optical transceiver detects the presence of the back-channel data and adjusts one or more of its operating parameters based on the back-channel data. There are other embodiments as well.
    Type: Grant
    Filed: January 20, 2017
    Date of Patent: August 13, 2019
    Assignee: INPHI CORPORATION
    Inventors: Todd Rope, Radhakrishnan L. Nagarajan
  • Patent number: 10284292
    Abstract: In one embodiment, a distributed antenna system comprises: at least one master unit; at least one remote antenna unit communicatively coupled via a switch to the master unit by a primary cable and a secondary cable both coupled to the switch, the remote antenna unit comprising a compensating link check module that outputs a control signal to the switch, wherein the switch selects between the primary and secondary cable in response to the control signal; wherein the compensating link check module controls the switch to momentarily select the secondary cable to perform a link check during which the remote unit measures a quality metric of a downlink signal received via the secondary cable; and upon initiation of the link check, the compensating link check module adjusts an attenuation of the downlink signal received on the secondary cable by loading calibration settings for the secondary cable into a compensation attenuator.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: May 7, 2019
    Assignee: Andrew Wireless Systems GmbH
    Inventors: Jaroslav Hoffmann, Peter Starek
  • Patent number: 10272930
    Abstract: An axle-counting method for railbound vehicles includes the following method steps: coupling light into at least one sensor fiber, wherein the sensor fiber includes at least one fiber Bragg grating mounted on a rail, wherein each fiber Bragg grating has a reflection spectrum having a reflection peak which is at a Bragg wavelength and has a full width at half maximum; generating a difference signal from two shear stress signals through detection and filtering the temporal intensity course of the light power reflected by two Fiber Bragg gratings which are arranged at a separation from one another; and generating a wheel signal if the difference signal exceeds a predetermined shear stress difference limiting value.
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: April 30, 2019
    Inventors: Kassen Oldewurtel, Rainer Klemm, Mathias Mueller
  • Patent number: 10244607
    Abstract: A daylight harvesting light fixture has a housing defining a light aperture, a light emitting diode (LED) in the housing for providing illumination through the aperture, a power supply for supplying drive current to the LED; a photosensor for sensing ambient illumination through the housing aperture, and a control circuit programmed and connected for a) turning off current to the LED for a dark interval imperceptible to the human eye; b) deriving an ambient illumination level signal based on the photosensor output while the LED is turned off; c) calculating an LED light output complementary to measured ambient illumination to achieve a target ambient illumination; and d) restoring drive current to the LED at a level adjusted to produce the calculated complementary LED light output. This sequence may be repeated periodically to maintain a target ambient illumination.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: March 26, 2019
    Assignee: DMF Inc.
    Inventor: Oren Kashani
  • Patent number: 10193625
    Abstract: A system with which any abnormality can be easily found is provided. A system includes: a first modulator that generates a control signal and modulates an input signal in accordance with the generated control signal, to control luminance of a first light source that emits light according to the modulated input signal, the first modulator outputting the control signal; a second modulator that acquires the control signal output from the first modulator and modulates an input signal in accordance with the control signal, to control luminance of a second light source that emits light according to the modulated input signal, the second modulator outputting the control signal. The first modulator generates, as a light ID signal, a control signal for transmitting a visible light signal by luminance variations of the first light source, and acquires a light information signal being the control signal output from the second modulator.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: January 29, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Toshiyuki Maeda, Masanori Oshimi, Hiroyuki Oku
  • Patent number: 10185090
    Abstract: Devices and methods are described for selecting a level of entanglement between two nondegenerate photons. The method may include receiving two non degenerate photons through a single input port of a directional photonic coupler; adjusting one of a first-order coupler dispersion M or a power splitting ratio ?(?00) of the directional optical coupler to select a ??; and, emitting the photons from corresponding output ports of the directional optical coupler, wherein the emitted photons have a spectral entanglement corresponding to the selected ??.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: January 22, 2019
    Assignee: THE GOVERNING COUNCIL OF THE UNIVERSITY OF TORONTO
    Inventors: Ryan Phillip Marchildon, Amr Saher Helmy
  • Patent number: 10168417
    Abstract: A system includes a control system. The control system includes a processor configured to receive a first signal from a light source within an industrial facility. The first signal includes a unique identification code configured to indicate at least a partial identity of a human resource within the industrial facility. The processor is configured to determine a proximity of the human resource with respect to the light source based at least in part on a received signal strength indicator (RSSI) of the first signal, and to generate an indication of a location of the human resource within the industrial facility based on the determined proximity of the human resource to the light source.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: January 1, 2019
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Selaka Bandara Bulumulla, Michael James Hartman, S. M. Shajedul Hasan, Steven William Wik
  • Patent number: 10171162
    Abstract: An apparatus and method for measuring frequency response characteristics of an optical transmitter and an optical receiver where the apparatus includes: a generating unit configured to generate a driving signal for driving the modulator of the optical transmitter, which comprises at least two frequencies; and a calculating unit configured to respectively calculate the frequency response characteristics of the optical transmitter and the optical receiver according to output signal components in output signals of the optical receiver corresponding to at least two detection signal components of identical amplitudes and different frequencies in detection signals. The frequency response characteristics of the optical transmitter and the optical receiver may be obtained, the amplitude responses and phase responses in the frequency response characteristics may be respectively obtained, and the measurement results are accurate and reliable.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: January 1, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Cheng Ju, Liang Dou, Zhenning Tao