Patents Examined by Leslie C Pascal
  • Patent number: 11982849
    Abstract: A method and system for locking the resonance frequency of ring resonators by using laser sources to emit a plurality of different wavelengths, applying a tagging signal to each of the wavelengths, multiplexing the tagged wavelengths using a wavelength division multiplexor, coupling the multiplexed tagged wavelengths onto a bus waveguide, detecting the multiplexed tagged wavelengths with a first photodetector disposed before a first ring resonator and a second photodetector disposed after a last ring resonator of a plurality of ring resonators, sending the signals detected by the first and second photodetector to a processor, which identifies and processes the tagging signals, generating a control signal for each ring resonator, by the processor and applying the control signals to phase shifters on each ring resonator of the plurality of ring resonators to tune and align the resonance wavelengths of the ring resonators with the wavelengths of the corresponding laser sources.
    Type: Grant
    Filed: November 9, 2021
    Date of Patent: May 14, 2024
    Inventors: Tongqing Wang, Xingyu Zhang, Dawei Zheng, Zhoufeng Ying
  • Patent number: 11966083
    Abstract: A communication device includes: a switching unit connected to a transmission unit, a reception unit, a transmission port, and a reception port, the switching unit being set in a first state in which the transmission unit and the transmission port are connected and the reception unit and the reception port are connected or a second state in which the transmission unit and the reception port are connected and the reception unit and the transmission port are connected; a monitoring unit configured to monitor a light level of light input from the reception port or the transmission port; and a control unit configured to set the switching unit in the first state or the second state based on the light level monitored by the monitoring unit.
    Type: Grant
    Filed: January 31, 2022
    Date of Patent: April 23, 2024
    Assignee: KDDI CORPORATION
    Inventors: Hidenori Takahashi, Daiki Soma, Shohei Beppu, Takehiro Tsuritani, Noboru Yoshikane
  • Patent number: 11947162
    Abstract: The present invention relates to a guiding apparatus for an imaging light path and a guiding method thereof. The guiding apparatus comprises at least one light-projection system to project at least one visible light beam and at least one light-guiding device disposed corresponding to the light-projection system. The light-guiding device has a first end, a second end, and a light path disposed between the first end and the second end. The visible light beam projected from the light-projection system is received at the first end and guided to an image-receiving object, including but not limited to the user's eyes, out of the second end through the light path to form a real or virtual image. The effects of high brightness of the visible light beam arriving at the image-receiving object, low consumption of light energy, and improved installation flexibility in a space-limited apparatus can be obtained.
    Type: Grant
    Filed: December 22, 2022
    Date of Patent: April 2, 2024
    Assignee: KDH Advanced Research Pty Ltd
    Inventors: Wei-Young Liang, Chung-Hsien Lu, Ranjith Rajasekharan Unnithan
  • Patent number: 11909513
    Abstract: Embodiments of this application disclose a spectrum processing apparatus, which includes: a port assembly, a lens assembly, a dispersive assembly, a spatial light modulator (SLM), and a reflective element. Each port in the port assembly is configured to transmit an input first light beam to a lens corresponding to the port. Each lens in the lens assembly is configured to adjust a width of the first light beam to obtain a second light beam. The reflective element is configured to reflect the second light beam to the dispersive assembly. The dispersive assembly is configured to decompose the second light beam into a plurality of sub-wavelength light beams. The reflective element is further configured to reflect the plurality of sub-wavelength light beams to the SLM. The SLM is configured to modulate the plurality of sub-wavelength light beams, and reflect at least one modulated sub-wavelength light beam to the reflective element.
    Type: Grant
    Filed: March 15, 2022
    Date of Patent: February 20, 2024
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Bing Zou, Yunfei Yan, Shimao Li
  • Patent number: 11910134
    Abstract: An optical links diagnostic system (LDS) and its operation within an optical circuit switch (OCS) for measurement and diagnosis of fiber-optic network fiber performance and quality is disclosed. The LDS can contain two photodetectors, a laser source, and be coupled to an OCS. Optical circulators can further be linked to the OCS. The LDS can be used both as an optical time domain reflectometer (OTDR) or as an optical return loss (ORL) meter and can automate the diagnosis of the fiber optical network fiber insertion loss and return loss.
    Type: Grant
    Filed: June 30, 2021
    Date of Patent: February 20, 2024
    Assignee: Google LLC
    Inventors: Jill Berger, Kevin Yasumura, Xiang Zhou, Pedram Z. Dashti, Ryohei Urata
  • Patent number: 11901941
    Abstract: A client device, such as a mobile phone or a mobile phone accessory (e.g., phone case), is provided that receives and transmits data (e.g., a social media code) via light wave communication. The light wave communication may comprise structured light (e.g., projected light patterns). The client device may include a lightbox comprised of LEDs located on a back face of the client device.
    Type: Grant
    Filed: July 9, 2021
    Date of Patent: February 13, 2024
    Assignee: Snap Inc.
    Inventors: Shree K. Nayar, Mikhail Fridberg, Mohit Gupta
  • Patent number: 11874501
    Abstract: A photonic device configured to perform matrix vector multiplication operations at high frequencies is provided. The vector being multiplied by the matrix is defined by vector components at specific wavelengths. The device includes a first waveguide and a second waveguide. A series of tunable microring resonators (MRRs) are coupled to the first waveguide and to a respective series of passive delay rings (PDRs), which are coupled to the second waveguide. Each MRR/PDR pair defines a tunable matrix component (tunable weight) for a respective wavelength component of the vector. A series of controllable delay elements (CDEs) such as all-pass filters are coupled to the first waveguide, upstream from the tunable MRRs. Any tuning dependent group delay caused by the MRR/PDR pairs can be compensated by controlling the CDEs such that each wavelength components has substantially a same delay as the other wavelength components.
    Type: Grant
    Filed: August 19, 2022
    Date of Patent: January 16, 2024
    Assignees: HUAWEI TECHNOLOGIES CANADA CO., LTD., QUEEN'S UNIVERSITY AT KINGSTON, THE UNIVERSITY OF BRITISH COLUMBIA
    Inventors: Mitchell Nichols, Enxiao Luan, Mahsa Salmani, Armaghan Eshaghi, Lutz Hans-Joachim Lampe
  • Patent number: 11843417
    Abstract: A programmable two-dimensional simultaneous multi-beam optically operated phased array receiver chip is manufactured based on silicon-on-insulator (SOI) and indium phosphide (InP) semiconductor manufacturing processes, including the SiN process. The InP-based semiconductor is used for preparing a laser array chip and a semiconductor optical amplifier array chip, the SiN is used for preparing an optical power divider, and the SOI semiconductor is used for preparing a silicon optical modulator, a germanium-silicon detector, an optical wavelength multiplexer, a true delay line, and other passive optical devices. The whole integration of the receiver chip is realized through heterogeneous integration of the InP-based chip and the SOI-based chip. Simultaneous multi-beam scanning can be realized through peripheral circuit programming control.
    Type: Grant
    Filed: May 16, 2023
    Date of Patent: December 12, 2023
    Assignee: ZHEJIANG LAB
    Inventors: Qiang Zhang, Hui Yu
  • Patent number: 11828992
    Abstract: A short-waveband active optical component based on a vertical emitting laser and a multi-mode optical fiber has an emitting end and a receiving end. In the emitting end, multiple VCSELs generate multiple optical signals of different wavelengths, and multiple photodiodes in the receiving end receive the optical signals emitted by the VCSELs. Both ends use a focusing lens array to collimate and focus the optical signals A Z-block-shaped prism performs a light combining function at the emitting end, while another Z-block-shaped prism performs a light splitting function at the receiving end. Both ends use a focusing lens for collimating and focusing the optical signals at ends of a multi-mode optical fiber, which is used for transmitting the optical signals generated by the VCSELs. The short-waveband active optical component has a small size and a high transmission rate.
    Type: Grant
    Filed: August 23, 2022
    Date of Patent: November 28, 2023
    Assignee: II-VI DELAWARE, INC.
    Inventors: Guanglong Yu, Hong Huang, Zihang Wang
  • Patent number: 11789217
    Abstract: An optical connector assembly a first structure and a second structure, the two structures secured together using a retention structure to form a hybrid assembly. The retention structure uses a slot apex located in a slot channel for securing at least one latch pin of a coupling nut to an adapter housing forming the ingress protected connector without the use of a bias spring. The hybrid assembly is designed to resist water or debris ingress, and may eliminate the use of a bias force to further resist separating the hybrid assembly.
    Type: Grant
    Filed: February 11, 2022
    Date of Patent: October 17, 2023
    Assignee: Senko Advanced Components, Inc
    Inventors: Kazuyoshi Takano, Jeffrey Gniadek, Paul Newbury
  • Patent number: 11774785
    Abstract: This disclosure relates to an optical limiter for limiting the radiant flux of an optical source beam, including an optical control port for illumination by an optical control beam originating from the source beam; an optical input port for illumination by an optical transmission beam originating from the source beam; an optical output port for illumination by the transmission beam; and a thermally driven light mill; wherein the light mill is arranged with respect to the input port, the control port and the output port such that: illumination of the control port by the control beam drives the light mill to rotate only when the control beam has a radiant flux equal to or in excess of a predetermined radiant flux threshold; and rotation of the light mill causes an area of the output port illuminated by the transmission beam to change.
    Type: Grant
    Filed: March 10, 2021
    Date of Patent: October 3, 2023
    Assignee: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
    Inventor: Marco Menchetti
  • Patent number: 11764872
    Abstract: An Optical Dispersion Compensator (ODC) is disclosed, the ODC being suitable for managing chromatic dispersion of an optical signal for transmission over an optical fiber. The ODC comprises a first ODC unit (202) arranged on a first optical bus (206), a second ODC unit (204) arranged on a second optical bus (208), parallel to the first optical bus (206), and a switching element (210) interconnecting the first and second optical buses (206, 208) between the first and second ODC units (202, 204). The first and second ODC units (202, 204) are operable to provide a delay to the optical signal that varies with frequency. The switching element (210) is configured, in a first state, to switch an optical signal received on one of the first or second optical buses (206, 208) to the other of the first or second optical buses (208, 206) and, in a second state, to maintain an optical signal received on one of the first or second optical buses (206, 208) on the optical bus on which it was received (206, 208).
    Type: Grant
    Filed: September 21, 2018
    Date of Patent: September 19, 2023
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Fabio Cavaliere, Luca Giorgi, Luca Poti, Gabriele De Angelis
  • Patent number: 11757531
    Abstract: The present disclosure relates to preventing laser access to microphones of smart devices. In one embodiment, a microphone of the smart device may be covered with an opaque material such as a cloth cover. The opaque material may serve as a barrier that is impenetrable to light, thereby preventing laser light to reach the microphone. In a further embodiment, a smart device may prevent the one or more microphones of the smart device from receiving an audio command embedded in a light signal by disrupting the light signal, ignoring the audio command, or both. In another embodiment, the smart device may block the audio command from being received at a microphone of a smart device by determining a frequency of the light signal, instructing a laser jammer to transmit a counter light with the frequency to interfere with the light signal.
    Type: Grant
    Filed: August 26, 2020
    Date of Patent: September 12, 2023
    Assignee: United Services Automobile Association (USAA)
    Inventors: Carlos J P Chavez, Sacha Melquiades De'Angeli, Oscar Guerra, David M. Jones, Jr., Gregory Brian Meyer, Christopher Russell, Arthur Quentin Smith
  • Patent number: 11742938
    Abstract: Methods and apparatuses for restoring lost signal in a network transmission line are disclosed. A first optical signal transmitted from a first optical module is received at an optical switch, the first optical signal having a first optical spectrum with data encoded into the first optical signal. A second optical signal having a second optical spectrum corresponding to the first optical spectrum without data encoded into the second optical signal, is received at the optical switch, the second optical signal the second optical signal transmitted from an amplified spontaneous emission source. Detecting, at a first photo detector, a loss of optical spectrum in the first optical signal, and, in response to detecting the loss of optical spectrum in the first optical signal, switching the optical switch from passing the first optical signal to passing the second optical signal thereby supplying at least one idler carrier without data imposed.
    Type: Grant
    Filed: December 18, 2020
    Date of Patent: August 29, 2023
    Assignee: Infinera Corporation
    Inventors: Ramakrishna Pratapa, Emilio Bravi
  • Patent number: 11729535
    Abstract: An optical switch is proposed, for routing an optical transmission signal according to an optical control signal, including one or more optical control ports; three or more optical transmission ports; a light director; and a thermally driven light mill; where the light mill and the light director are arranged with respect to each other, to the one or more control ports and to the three or more transmission ports such that: illumination of a respective one of the one or more control ports by a control beam carrying the control signal drives the light mill to rotate towards a respective position in which the light director is arranged so as to direct a transmission beam carrying the transmission signal, entering the switch via a respective one of the transmission ports, to exit the switch via a respective other of the transmission ports.
    Type: Grant
    Filed: March 10, 2021
    Date of Patent: August 15, 2023
    Assignee: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
    Inventor: Marco Menchetti
  • Patent number: 11714238
    Abstract: A wavelength division multiplexing filter comprises: a first multi-order Mach-Zehnder interferometer comprising a plurality of first-order Mach-Zehnder interferometers, and a second multi-order Mach-Zehnder interferometer comprising a plurality of first-order Mach-Zehnder interferometers; wherein the first multi-order Mach-Zehnder interferometer and the second multi-order Mach-Zehnder interferometer are included in a group of multiple multi-order Mach-Zehnder interferometers arranged within a binary tree arrangement, the binary tree arrangement comprising: a first set of a plurality of multi-order Mach-Zehnder interferometers, the first set including the first multi-order Mach-Zehnder interferometer, and having an associated spectral response with a first spacing between adjacent passbands, and a second set of at least twice as many multi-order Mach-Zehnder interferometers as in the first set, the second set including the second multi-order Mach-Zehnder interferometer, and having an associated spectral respon
    Type: Grant
    Filed: January 6, 2022
    Date of Patent: August 1, 2023
    Assignee: Analog Photonics LLC
    Inventors: Zhan Su, Erman Timurdogan
  • Patent number: 11681103
    Abstract: Embodiments of the present disclosure provide etch-variation tolerant optical coupling components and processes for making the same. An etch-variation tolerant geometry is determined for at least one waveguide of an optical coupling component (e.g., a directional coupler). The geometry is optimized such that each fabricated instance of an optical component design with the etch-variation tolerant geometry has substantially the same coupling ratio at any etch depth between a shallow etch depth and a deep etch depth.
    Type: Grant
    Filed: May 26, 2020
    Date of Patent: June 20, 2023
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Peng Sun, Mir Ashkan Seyedi, Thomas Van Vaerenbergh, Marco Fiorentino
  • Patent number: 11664639
    Abstract: A circuit is disclosed having a component having repeatable distortion characteristics; and a drive circuit for providing a drive signal and comprising a non-linear filter for pre-compensating for distortion introduced by the component having repeatable distortion characteristics in response to the drive signal, the distortion having a non-linear response to the drive signal.
    Type: Grant
    Filed: January 25, 2022
    Date of Patent: May 30, 2023
    Assignee: SEMTECH CANADA CORPORATION
    Inventor: Gurpreet S. Bhullar
  • Patent number: 11617029
    Abstract: Waveguide shuffle blocks (WSBs) are provided that may incorporate waveguides routed in any pattern to effectuate many-to-many connectivity between optical cables/fibers or other WSBs connected thereto. Such WSBs may be configured in ways that allow the WSBs to be stacked and to achieve effective optical cable/fiber organization. Moreover, such WSBs may include readable tags that can provide information regarding a particular WSB configuration and/or what optical cables/fibers are connected so that network topology can be discovered and monitored. Some WSBs may be configured as wavelength shifting shuffles (WSSs) that allow a particular wavelength(s) of an optical signal(s) to be routed as desired and/or alter a first wavelength associated with a particular optical signal to a second wavelength. In other embodiments WSSs can be configured to allow for wavelength multiplexing/demultiplexing.
    Type: Grant
    Filed: June 25, 2020
    Date of Patent: March 28, 2023
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Kevin B. Leigh, Paul Kessler Rosenberg, Stanley Cheung
  • Patent number: 11594854
    Abstract: Embodiments of the present disclosure include optical transmitters and transceivers with improved reliability. In some embodiments, the optical transmitters are used in network devices, such as in conjunction with a network switch. In one embodiment, lasers are operated at low power to improve reliability and power consumption. The output of the laser may be modulated by a non-direct modulator and received by integrated optical components, such as a modulator and/or multiplexer. The output of the optical components may be amplified by a semiconductor optical amplifier (SOA). Various advantageous configurations of lasers, optical components, and SOAs are disclosed. In some embodiments, SOAs are configured as part of a pluggable optical communication module, for example.
    Type: Grant
    Filed: July 24, 2020
    Date of Patent: February 28, 2023
    Assignee: Arista Networks, Inc.
    Inventors: Alexey Kovsh, David Towne, Peter Parkinson, Andreas Bechtolsheim