Plural (e.g., Data Bus) Patents (Class 385/24)
  • Patent number: 11567266
    Abstract: Structures for a grating coupler and methods of fabricating a structure for a grating coupler. The structure includes a grating coupler having a central portion and edge portions. The central portion and the edge portions define a sidewall, and the central portion and the edge portions have a first longitudinal axis along which the edge portions are arranged in a spaced relationship. Each edge portion projects from the sidewall at an angle relative to the first longitudinal axis. A waveguide core is optically coupled to the grating coupler. The first longitudinal axis is aligned in a first direction, and the waveguide core has a second longitudinal axis that is aligned in a second direction different from the first direction.
    Type: Grant
    Filed: December 15, 2021
    Date of Patent: January 31, 2023
    Assignee: GlobalFoundries U.S. Inc.
    Inventors: Judson Holt, Yusheng Bian, Qizhi Liu, Elizabeth Strehlow
  • Patent number: 11568919
    Abstract: The embodiments described herein describe technologies for using the memory modules in different modes of operation, such as in a standard multi-drop mode or as in a dynamic point-to-point (DPP) mode (also referred to herein as an enhanced mode). The memory modules can also be inserted in the sockets of the memory system in different configurations.
    Type: Grant
    Filed: May 28, 2021
    Date of Patent: January 31, 2023
    Assignee: Rambus Inc.
    Inventors: Frederick A. Ware, Suresh Rajan, Scott C. Best
  • Patent number: 11563508
    Abstract: A communications network includes a central communication unit, an optical transport medium, and a plurality of remote radio base stations. The central communication unit generates, within a selected millimeter-wave frequency band, a plurality of adjacent two-tone optical frequency conjugate pairs. Each conjugate pair includes a first optical tone carrying a modulated data signal, and a second optical tone carrying a reference local oscillator signal. The optical transport medium transports the plurality of two-tone conjugate pairs to the plurality of radio base stations, and each base station receives at least one conjugate pair at an optical front end thereof. The optical front end separates the first optical tone from the second optical tone, and converts the first optical tone into a millimeter-wave radio frequency electrical signal.
    Type: Grant
    Filed: October 11, 2021
    Date of Patent: January 24, 2023
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Mu Xu, Ruoyu Sun, Balkan Kecicioglu, Junwen Zhang, Haipeng Zhang, Zhensheng Jia, Luis Alberto Campos
  • Patent number: 11552702
    Abstract: A distributed fiber sensing system may use an integrated coherent receiver. The integrated coherent receiver may include a planar lightwave circuit including various optical components.
    Type: Grant
    Filed: April 28, 2021
    Date of Patent: January 10, 2023
    Assignee: Fiber Sense Limited
    Inventor: Gideon Yoffe
  • Patent number: 11543603
    Abstract: An optical ferrule has a different thermal expansion coefficient than a substrate to which a optical device is mounted, the ferrule optically coupling the device to one or more optical fibers. The optical ferrule includes and/or a cradle in which the ferrule is mounted include lateral and longitudinal engagement feature that ensure alignment with the optical device at an operating temperature, the ferrule expanding relative to the substrate when transitioning to the operating temperature.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: January 3, 2023
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventor: Michael A. Haase
  • Patent number: 11502719
    Abstract: A wireless communication apparatus includes a first conductor and a second conductor that function as a set of electrodes for wireless communication, a third conductor and a fourth conductor that function as another set of electrodes for wireless communication. A difference between a first distance between a centroid of the first conductor and a centroid of the third conductor and a second distance between a centroid of the second conductor and the centroid of the third conductor is less than a width of the first conductor and a width of the second conductor. A third distance between the centroid of the first conductor and a centroid of the fourth conductor is longer than the first distance. A fourth distance between the centroid of the second conductor and the centroid of the fourth conductor is longer than the second distance.
    Type: Grant
    Filed: May 10, 2021
    Date of Patent: November 15, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hitoshi Asai
  • Patent number: 11495938
    Abstract: A hybrid semiconductor laser component comprising at least one first emitting module comprising an active zone shaped to emit electromagnetic radiation at a given wavelength; and an optical layer comprising at least one first waveguide optically coupled with the active zone, the waveguide forming with the active zone an optical cavity resonating at the given wavelength. The hybrid semiconductor laser component also comprises a heat-dissipating semiconductor layer, the heat-dissipating semiconductor layer being in thermal contact with the first emitting module on a surface of the first emitting module that is opposite the optical layer. The invention also relates to a method for manufacturing such a hybrid semiconductor laser component.
    Type: Grant
    Filed: June 18, 2018
    Date of Patent: November 8, 2022
    Assignee: COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES
    Inventors: Sylvie Menezo, Olivier Girard
  • Patent number: 11487063
    Abstract: An undersea fiber optic cable routing architecture including a branching unit coupled to three trunk cables capable of switching individual fibers in each fiber pair within a cable to either of the other two cables. The branching unit comprises a plurality of optical switches and a controller for receiving remote command signals and configuring the optical switches in accordance with the remote command signals.
    Type: Grant
    Filed: March 3, 2021
    Date of Patent: November 1, 2022
    Assignee: SubCom, LLC
    Inventors: Lara Denise Garrett, Haifeng Li, Dmitriy Kovsh
  • Patent number: 11487065
    Abstract: Devices having at least one connector port associated with a rotating securing features are disclosed. A device for making optical connections comprising a shell, at least one connection port, and at least one rotating securing feature is disclosed. In one embodiment, the at least one connection port is disposed on a device with at the least one connection port comprising an optical connector opening extending from an outer surface of the device into a cavity of the device and defining a connection port passageway. The at least one rotating securing feature is associated with the connection port passageway, and the at least one rotating securing feature is secured to the device along a rotational axis that is not aligned with a longitudinal axis of the at least one connection port.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: November 1, 2022
    Assignee: Corning Research & Development Corporation
    Inventors: Thierry Luc Alain Dannoux, Felice Scotta
  • Patent number: 11467419
    Abstract: Disclosed are a projection module, a structured light three-dimensional imaging device, and an electronic apparatus. The projection module includes a laser emitter and a reflective grating. The laser emitter includes a light emitting surface from which laser light is emitted. The reflective grating includes a reflecting surface arranged obliquely relative to the light emitting surface and opposite to the light emitting surface. The reflective face is provided with a grating microstructure thereon. The projection module can adjust a reflection angle of the laser light when expanding beams to generate a laser pattern.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: October 11, 2022
    Assignee: NANCHANG O-FILM BIO-IDENTIFICATION TECHNOLOGY CO., LTD.
    Inventors: Joseph Lin, Horatio Lee, Martin Chen, George Chou
  • Patent number: 11456515
    Abstract: A method includes receiving a radio frequency (RF) input signal using at least one non-reciprocal circulator. The method also includes generating an RF output signal using at least one of multiple reflective filter elements. Each reflective filter element is configured to receive an RF signal from the at least one non-reciprocal circulator and to provide a filtered RF signal to the at least one non-reciprocal circulator. The reflective filter elements include amplitude change reflectors configured to modify amplitudes of the RF signal at different frequencies. The RF output signal represents the RF input signal as modified by the at least one of the reflective filter elements.
    Type: Grant
    Filed: May 4, 2021
    Date of Patent: September 27, 2022
    Assignee: Raytheon Company
    Inventors: Zhaoyang C. Wang, Ajay Subramanian, Jason C. Soric, Matthew A. Morton
  • Patent number: 11457294
    Abstract: An apparatus can include an optical transceiver having a body with a first end at which a circuitry interface is located to facilitate transfer of data between a network appliance and the optical transceiver. The apparatus further includes a four-cable interface at a second end of the body. The four-cable interface releasably receives four independently releasable connectors for transfer of optical signals between the optical transceiver and respective ferrules of the four independently releasable connectors. In some examples, a carrier may be provided that is releasably connected with the four-cable interface and that includes four sockets for respectively independently receiving the four independently receivable connectors so as to facilitate collective insertion and removal of the four independently releasable connectors relative to the four-cable interface.
    Type: Grant
    Filed: April 6, 2020
    Date of Patent: September 27, 2022
    Assignee: Amazon Technologies, Inc.
    Inventors: Alaa Adel Mahdi Hayder, Kanika Gupta, Jason Eslick
  • Patent number: 11448815
    Abstract: A compact collimator or projector includes a waveguide having a slab core structure supporting at least two lateral modes of propagation. A light beam coupled into a first mode propagates to an edge of the waveguide where it is reflected by a reflector to propagate back. Upon propagation back and forth, the light is converted into a second mode. An out-coupling region, such as an evanescent coupler, is provided to out-couple the light propagating in the second mode. The reflector may have focusing power to collimate the out-coupled light beam. The light beam may be converted from the first to the second mode without being reflected from a reflector.
    Type: Grant
    Filed: November 6, 2020
    Date of Patent: September 20, 2022
    Assignee: Meta Platforms Technologies LLC
    Inventors: Alexander Koshelev, Giuseppe Calafiore
  • Patent number: 11428879
    Abstract: A method for forming a package structure is provided. The method includes disposing an optical component and a waveguide over a substrate, forming a passivation layer over the substrate and covering the optical component and the waveguide, and forming a reflector including a metal layer and a first semiconductor layer on the passivation layer, wherein the metal layer and the first semiconductor layer are in contact with the passivation layer.
    Type: Grant
    Filed: March 10, 2021
    Date of Patent: August 30, 2022
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Sung-Hui Huang, Jui-Hsieh Lai, Shang-Yun Hou
  • Patent number: 11409060
    Abstract: The optical module according to the present invention includes a photoelectric converter and an optical receptacle. The optical receptacle includes a first optical surface, a second optical surface, a transmission and reflection part, a recess, and a third optical surface. The transmission and reflection part is secured to the inner surface of the recess at a position that does not coincide with the optical path of signal light. The transmission and reflection part transmits the signal light incident on the first optical surface toward the second optical surface. The transmission and reflection part reflects the received light incident on the second optical surface toward the third optical surface. When viewed along a direction normal to a substrate, the optical path in the recess is inclined relative to the optical path between the second optical surface and the recess.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: August 9, 2022
    Assignee: ENPLAS CORPORATION
    Inventor: Ayano Kon
  • Patent number: 11405124
    Abstract: A master station device is connected to a slave station device that emits a transmission signal received by light via an optical transmission path from a plurality of antenna elements.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: August 2, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kota Ito, Nobuaki Otsuki, Mizuki Suga, Naoki Kita
  • Patent number: 11381336
    Abstract: A method of configuring an optical link with an optimized spectral efficiency and bit rate is provided. The method includes obtaining, by a controller of an optical network, a baseline configuration that includes a traffic mode that uses a predetermined channel spacing of a plurality of channels in a frequency spectrum. The plurality of channels are used for transmitting optical signals on an optical link in the optical network. The method further includes selecting three contiguous channels that include a center channel and two adjacent channels and while maintaining a performance parameter above or equal to a threshold value, moving the adjacent channels closer to the center channel and varying at least one transmission parameter, thereby reducing a spacing of the center channel. As such, a spectral frequency map is generated in which the channel spacing is reduced and an optical link is configured based on the spectral frequency map.
    Type: Grant
    Filed: November 11, 2020
    Date of Patent: July 5, 2022
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Giovanni Marenco, Claudio Crognale, Davide Sirtori
  • Patent number: 11381320
    Abstract: An optical transmission system includes light supply devices, light receiving devices, an optical fiber cable, an electric power combiner and a data processing unit. MIMO communication is performed by the light receiving devices receiving signal beams having signals different from one another, output from the light supply devices and transmitted through a single core or cladding of the optical fiber cable. The signal beams are feed beams. The light supply devices output the feed beams with signals different from one another superimposed thereon by modulation. The light receiving devices convert the feed beams transmitted thereto into electric powers. The electric power combiner combines the electric powers obtained by the conversion. The data processing unit obtains signals superimposed on the feed beams received by the light receiving devices, and based on the obtained signals, obtains the signals superimposed by the light supply devices on the feed beams.
    Type: Grant
    Filed: August 20, 2020
    Date of Patent: July 5, 2022
    Assignee: KYOCERA CORPORATION
    Inventor: Shuichi Tamate
  • Patent number: 11372254
    Abstract: The invention relates to an arrangement for producing a Bessel beam (5), comprising a beam-forming element (2), which transforms a beam (1) incident as a plane electromagnetic wave into a Bessel beam (5). According to the invention, the beam-forming element (2) comprises at least one annular lens (3, 3?) and a Fourier optical unit, e.g. in the form of a Fourier lens (4).
    Type: Grant
    Filed: June 22, 2017
    Date of Patent: June 28, 2022
    Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forchung E.V.
    Inventors: Ralf Steinkopf, Stefan Nolte, Christian Vetter, Alexander Szameit, Herbert Gross, Marco Ornigotti
  • Patent number: 11353362
    Abstract: An apparatus includes a substrate transmissive of electromagnetic energy of at least a plurality of wavelengths, having a first end, a second end, a first major face, a second major face, at least one edge, a length, a width, and a thickness, at least a first output optic that outputs electromagnetic energy the substrate; and a first input optic oriented and positioned to provide electromagnetic energy into the substrate via at least one of the first or the second major face of the substrate. The first output optic is laterally spaced from the first input optic. A number of reflectors and optional absorbers may be positioned proximate the first major face and/or the second major face to structure electromagnetic energy and/or to translate such from the first input optic to the first output optic. The apparatus may be part of a spectrometer or other optical system.
    Type: Grant
    Filed: November 16, 2020
    Date of Patent: June 7, 2022
    Assignee: CHROMATION INC.
    Inventors: James Scholtz, Nadia Pervez, Ioannis Kymissis, Michael Gazes
  • Patent number: 11333950
    Abstract: An optical module of a configuration that ensures use of commercially available electronic components and reduction of the number of current generation circuits and electric wirings. The optical module includes an electronic component mounted on a separate board from a light wave circuit board provided with an optical component such as an optical switch, and they are each electrically connected by wire bonding. For this reason, the optical module can use a commercially available electronic component. In addition, the module has a configuration in which heaters of optical switches, which do not simultaneously flow currents, are grouped and a current from one current generation circuit is supplied to any one of the heaters in the group by means of one electrical switch. For this reason, the optical module does not have to be prepared with the same number of electrical switches and current generation circuits as the number of heaters.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: May 17, 2022
    Assignee: NTT ELECTRONICS CORPORATION
    Inventors: Atsushi Kusayama, Yasuyuki Nanaumi, Kiyoshi Kido, Yuji Akahori
  • Patent number: 11335774
    Abstract: A device includes a fin extending from a semiconductor substrate, a gate stack over and along a sidewall of the fin, an isolation region surrounding the gate stack, an epitaxial source/drain region in the fin and adjacent the gate stack, and a source/drain contact extending through the isolation region, including a first silicide region in the epitaxial source/drain region, the first silicide region including NiSi2, a second silicide region on the first silicide region, the second silicide region including TiSix, and a conductive material on the second silicide region.
    Type: Grant
    Filed: October 18, 2019
    Date of Patent: May 17, 2022
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Yan-Ming Tsai, Chih-Wei Chang, Ming-Hsing Tsai, Sheng-Hsuan Lin, Hung-Hsu Chen, Wei-Yip Loh
  • Patent number: 11336386
    Abstract: In order to provide a submarine optical transmission system that utilizes multiple wavelength bands, the submarine branching apparatus is provided with: a first demultiplexing part for demultiplexing a wavelength-multiplex optical signal input from a first terminal station into a first wavelength-multiplex optical signal and a second wavelength-multiplex optical signal; an optical add-drop part for outputting at least a third wavelength-multiplex optical signal included in the first wavelength-multiplex optical signal to a second terminal station, and for outputting a fifth wavelength-multiplex optical signal by multiplexing at least a fourth wavelength-multiplex optical signal included in the first wavelength-multiplex optical signal with a wavelength-multiplex optical signal input from the second terminal station; and a first multiplex part for multiplex the second wavelength-multiplex optical signal with the fifth wavelength-multiplex optical signal input from the optical add-drop part and outputting the r
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: May 17, 2022
    Assignee: NEC CORPORATION
    Inventor: Kazusa Ugajin
  • Patent number: 11327255
    Abstract: An optical-communication module includes an arrayed waveguide grating; a light transmitter including light-emitting elements for emitting first signal beams into the arrayed waveguide grating, wherein the first signal beams are converged into one first communication beam in the arrayed waveguide grating; a wavelength division multiplexing filter is used to transmit the first communication beam emitted by the arrayed waveguide grating to an optical fiber; an optical receiver including optical sensor for sensing second signal beams emitted from the arrayed waveguide grating. The optical fiber is used for transmitting a second communication beam to the wavelength division multiplexing filter. The second communication light beam enters the arrayed waveguide grating through the wavelength division multiplexing filter. The second communication beam is divided into the second signal beams in the arrayed waveguide grating.
    Type: Grant
    Filed: May 6, 2021
    Date of Patent: May 10, 2022
    Assignee: SHUNYUN TECHNOLOGY (ZHONG SHAN) LIMITED
    Inventor: Jie Huang
  • Patent number: 11329751
    Abstract: Devices, computer-readable media and methods are disclosed for verifying that an optical transmit/receive device is correctly installed. For example, a processing system including at least one processor may activate a first light source of an optical transmit/receive device of a telecommunication network and detect a receiving of a light from the first light source at a port of an optical add/drop multiplexer of the telecommunication network. The processing system may then verify the optical transmit/receive device and the port of the optical add/drop multiplexer match a network provisioning order, when the receiving of the light from the first light source is detected, and may generate an indication that the optical transmit/receive device is correctly installed, when the optical transmit/receive device and the port of the optical add/drop multiplexer match the network provisioning order.
    Type: Grant
    Filed: May 17, 2021
    Date of Patent: May 10, 2022
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Simon Tse, Martin Birk, Shweta Vachhani, Kathleen Tse
  • Patent number: 11320598
    Abstract: The present disclosure is generally directed to an optical demultiplexer for use in an optical transceiver module having a truncated profile/shape to increase tolerance and accommodate adjacent optical components. In more detail, the optical demultiplexer comprises a body with at least one truncated corner at the input end. The at least one truncated corner allows the optical demultiplexer to be disposed/mounted, e.g., directly, on a densely populated transceiver substrate, e.g., a printed circuit board (PBC), and provide additional tolerance/space for mounting of circuitry and/or components within the region that would normally be occupied by corner(s) of the optical demultiplexer body. The at least one truncated corner may be introduced in a post-production step, e.g., via cut & polishing, or introduced during formation of the optical demultiplexer using, for instance, photolithography techniques.
    Type: Grant
    Filed: November 24, 2019
    Date of Patent: May 3, 2022
    Assignee: Applied Optoelectronics, Inc.
    Inventors: Kai-Sheng Lin, Hao-Chiang Cheng, Ziliang Cai
  • Patent number: 11290189
    Abstract: To provide an optical communication system and an optical communication method able to achieve a high reliable access network capable of long haul distance transmission considering the optical energy efficiency even if the user distribution is biased. An uneven branch optical splitter included in an optical communication system according to the present invention can output the optical intensities different for each output port by adjusting the branching configuration and the branching ratio. For example, a reach transmission distance of the farmost user can be extended or the number of connectible users can be increased by adjusting the branching configuration of the uneven branch optical splitter or the branching ratios such that the near minimum reception sensitivity is given for the ONU installed near the telecommunications carrier.
    Type: Grant
    Filed: August 21, 2019
    Date of Patent: March 29, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Atsuko Kawakita, Kazutaka Hara, Hiroyuki Furukawa, Yasutaka Kimura, Kenji Horikawa
  • Patent number: 11290187
    Abstract: In one embodiment, a host-to-host network comprises: first host units (HUs) located at a first end and configured to output optical output signals and receive optical input signals; second HUs located at a second end and configured to output optical output signals and receive optical input signals; a first optical WDM configured to combine the first HU optical output signals and output a corresponding first combined output over a first fiber; a second optical WDM configured to receive the first combined output and demultiplex the optical output signals and provide them as optical input signals for the second HUs; the second optical WDM configured to combine second HU optical output signals and output a corresponding second combined output over a second fiber; the first optical WDM configured to receive the second combined output and demultiplex the optical output signals and provide them as optical input signals for the first HUs.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: March 29, 2022
    Assignee: CommScope Technologies LLC
    Inventor: Trevor D. Smith
  • Patent number: 11271654
    Abstract: An optical repeater is disclosed, comprising: an optical input port for receiving an input optical signal; an optical output port for transmitting an output optical signal; electronics comprising an amplifier configured to increase a signal level of the optical signal between the input port and the output port; a voltage regulator configured to provide a variable voltage power supply to the electronics, and optionally comprising a local or external controller configured to determine a supply voltage in response to demand and to control the voltage regulator to provide the supply voltage.
    Type: Grant
    Filed: September 3, 2020
    Date of Patent: March 8, 2022
    Assignee: Neptune Subsea IP Limited
    Inventors: David Antony Frisch, Alistair Hill
  • Patent number: 11269139
    Abstract: A dependency of a characteristic of an optical circuit on an optical signal intensity occurring due to input of a high intensity optical signal is reduced in a waveguide type optical interferometer circuit. The waveguide type optical interferometer circuit is a waveguide type optical interferometer circuit formed in one plane, and includes an input waveguide, an optical branching unit, an optical coupling unit, an output waveguide, and optical waveguides having different lengths from each other and being interposed between the optical branching unit and the optical coupling unit. A light intensity compensating region is formed on an optical path extending from the optical branching unit to the optical coupling unit, and the light intensity compensating region is formed by using a light intensity compensating material having a light intensity coefficient different from a light intensity coefficient of an optical distance relative to an incident light intensity in the optical path.
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: March 8, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Nobutatsu Koshoubu, Ryoichi Kasahara, Katsuhiko Hirabayashi
  • Patent number: 11271669
    Abstract: An edge wavelength-switching system includes an optical switch and a wavelength selective switch. The optical switch includes a west hub-side port, an east hub-side port, a west local-side port, and an east local-side port. The wavelength selective switch includes (i) a multiplexed port optically coupled to the west local-side port and (ii) a bypass port optically coupled to the east local-side port, and (iii) a plurality of demultiplexed ports. An optical network includes a network hub including an M-by-N1 wavelength-selective switch, N1>M?1, a first network node, and a second network node. Each of the first and second network nodes includes a respective edge wavelength-switching system. The network hub, the first network node, and the second network node are optically coupled.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: March 8, 2022
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Luis Alberto Campos, Jing Wang, Zhensheng Jia, Jim Campanell, Carmela Stuart, Haipeng Zhang
  • Patent number: 11249254
    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: April 8, 2020
    Date of Patent: February 15, 2022
    Assignee: Analog Photonics LLC
    Inventors: Zhan Su, Erman Timurdogan
  • Patent number: 11243349
    Abstract: A device includes a first excitation light source that emits first excitation light, a second excitation light source that emits second excitation light, a wavelength converter that converts signal light of a first wavelength into signal light of a second wavelength according to the first excitation light, and a measurer that measures a frequency difference between the first excitation light and the second excitation light, wherein when an abnormality of the first excitation light is detected, the second excitation light source is adjusted so that a frequency of the second excitation light is aligned with a frequency of the first excitation light before the abnormality detection, based on the frequency difference before the abnormality detection, and the wavelength converter converts the signal light of the first wavelength into the signal light of the second wavelength according to the second excitation light, after adjusting the frequency of the second excitation light.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: February 8, 2022
    Assignee: FUJITSU LIMITED
    Inventors: Tomohiro Yamauchi, Takeshi Hoshida, Shingo Hara, Hiroki Satou
  • Patent number: 11234078
    Abstract: A system that includes an audio source device configured to obtain audio data of at least one audio channel of a piece of program content. The audio source device has an optical transmitter for transmitting the audio data as an optical signal and a radio frequency (RF) transceiver. The system also includes a wireless earphone that has an optical receiver for receiving the audio data as the optical signal, a RF transceiver for transmitting feedback data indicating a reception quality of the received optical signal at the wireless earphone as a wireless RF signal, and a speaker for outputting the audio data contained within the optical signal and/or the data packets as sound.
    Type: Grant
    Filed: June 25, 2020
    Date of Patent: January 25, 2022
    Assignee: APPLE INC.
    Inventors: Robert D. Silfvast, Tushar Gupta, Jahan C. Minoo, Nicholas C. Soldner, Daniel Javaheri-Zadeh
  • Patent number: 11223442
    Abstract: Signal distribution arrangements are assembled by selecting a terminal body and a tap module combination that provides the desired signal strength at the intended position in an optical network. Each terminal body includes an input connection interface, a pass-through connection interface, a module connection interface, and multiple drop connection interfaces. Each tap module houses an optical tap having an asymmetric split ratio. Most of the optical signal power received at the signal distribution arrangement passes to the pass-through connection interface. A portion of the optical signal power is routed to the drop connection interfaces (e.g., via a symmetrical optical power splitter). The tap module and terminal body combination are selected based on the desired number of drop connection interfaces and to balance the asymmetric split ratio with the symmetric split ratio.
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: January 11, 2022
    Assignee: CommScope Technologies LLC
    Inventors: David James Mather, Jan Jozef Julia Maria Erreygers, Salvatore Tuccio
  • Patent number: 11194223
    Abstract: A method of forming an emitting array of waveguides, comprising providing a plurality of waveguides that exhibit different propagation constants so as to ensure that nearby waveguides do not couple evenly over parallel propagation lengths by varying a length in one or more dimensions of respective waveguides, whereby the respective waveguides are phase mismatched with at least their nearest neighbor.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: December 7, 2021
    Assignee: The Trustees of Columbia University in the City of New York
    Inventors: Michal Lipson, Christopher Thomas Phare, Moshe Zadka
  • Patent number: 11169329
    Abstract: An optical receiver includes: an optical stub which includes an optical fiber; an optical demultiplexer; a plurality of photo detectors; a TIA; an optical block including a first concavity, a second concavity, a first reflective plane, a second reflective plane, and a third reflective plane, the first concavity being configured to hold the optical stub, the second concavity being configured to accommodate the optical demultiplexer, the first reflective plane and the second reflective plane being configured to sequentially reflect a multiplex optical signal so that the multiplex optical signal emitted from an end surface of the optical stub is folded back toward the optical stub and is sequentially incident to the optical demultiplexer, and the third reflective plane being configured to reflect the plurality of single-wavelength optical signals emitted from the optical demultiplexer toward the plurality of photo detectors; and a circuit board.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: November 9, 2021
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kenichi Nakayama, Masanobu Kawamura
  • Patent number: 11154226
    Abstract: A medical sensor is described. In an example, the medical sensor includes a nanoscale tapered waveguide attached to a substrate. The nanoscale tapered waveguide includes a nanoscale channel that receives fluid and an excitation light and that outputs a response light. The excitation light propagates through the fluid. A receiving channel of the nanoscale channel is configured as a waveguide that receives and guides the excitation to a linearly tapered channel of the nanoscale channel. The linearly tapered channel has three dimensional linear tapering that focuses the excitation light guided from the receiving channel into an optical response channel of the nanoscale channel. In turn, the optical response channel is configured as a waveguide that outputs a response light in response to the excitation light focused from the linearly tapered channel. The response light corresponds to a response of an analyte of the fluid present in the optical response channel.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: October 26, 2021
    Assignees: California Institute of Technology, University of Southern California, Doheny Eye institute
    Inventors: Yu-Chong Tai, Hyuck Choo, Ramiro Magalhaes Ribeiro, Mark S. Humayun
  • Patent number: 11146351
    Abstract: A communications network includes a central communication unit, an optical transport medium, and a plurality of remote radio base stations. The central communication unit generates, within a selected millimeter-wave frequency band, a plurality of adjacent two-tone optical frequency conjugate pairs. Each conjugate pair includes a first optical tone carrying a modulated data signal, and a second optical tone carrying a reference local oscillator signal. The optical transport medium transports the plurality of two-tone conjugate pairs to the plurality of radio base stations, and each base station receives at least one conjugate pair at an optical front end thereof. The optical front end separates the first optical tone from the second optical tone, and converts the first optical tone into a millimeter-wave radio frequency electrical signal.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: October 12, 2021
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Mu Xu, Ruoyu Sun, Balkan Kecicioglu, Junwen Zhang, Haipeng Zhang, Zhensheng Jia, Luis Alberto Campos
  • Patent number: 11137547
    Abstract: In a wavelength selective filter, an optical fiber collimator, an interference filter, and a reflective plate are arranged in this order from front to rear along a z-axis. The collimator has a collimator lens disposed on the rear side of an optical fiber that is opened. The interference filter includes light incident and emitting surfaces, opposed with their xy-planes rotated about a y-axis at a predetermined rotation angle. The reflective plate has a front reflective surface having a normal direction along a z-axis direction, and reflects, toward the front, light incident from the front through the interference filter, to be incident onto the interference filter. The optical fiber collimator causes the input light propagating through the optical fiber from the front to be incident onto the interference filter, and converges the reflected light transmitted through the interference filter to the optical fiber and outputs the light.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: October 5, 2021
    Assignee: Kohoku Kogyo Co., Ltd.
    Inventors: Takashi Kato, Toshihisa Okubo
  • Patent number: 11133873
    Abstract: An optical receiver includes an inlet aperture configured to receive an incident optical signal and a plurality of optical components configured to separate the incident optical signal into an amplitude modulated transmitted linearly s-polarized signal, an amplitude modulated transmitted linearly p-polarized signal, an amplitude modulated reflected linearly s-polarized signal, and an amplitude modulated reflected linearly p-polarized signal.
    Type: Grant
    Filed: October 28, 2020
    Date of Patent: September 28, 2021
    Assignee: RAYTHEON COMPANY
    Inventors: Andrew Kowalevicz, Benjamin P. Dolgin, Gary M. Graceffo
  • Patent number: 11119278
    Abstract: An optical demultiplexer is disclosed that separates light including a plurality of wavelengths into light of respective wavelengths. Unit circuits are cascaded in a tree structure. In optical demultiplexer components having the same structure, a combination of arm length differences in waveguide pairs is the same with respect to the N?1 Asymmetric Mach-Zehnder interferometers in which the phase shifters are arranged, where N equals number of 2×2 couplers. In three of the optical demultiplexer components in at least one of the unit circuits, N is three or more. Each of control circuits controls the phase shifters arranged in a corresponding optical demultiplexer component of a corresponding unit circuit in order to increase or decrease a value of a function having, as an argument, a power value acquired by a monitor from among monitors arranged at four optical waveguides at an output side of the corresponding unit circuit.
    Type: Grant
    Filed: May 27, 2020
    Date of Patent: September 14, 2021
    Assignees: FUJITSU LIMITED, PHOTONICS ELECTRONICS TECHNOLOGY RESEARCH ASSOCIATION
    Inventor: Tomoyuki Akiyama
  • Patent number: 11119286
    Abstract: A receiver optical assembly includes: an optical platform, a receiver optical port and a wavelength division multiplexer being arranged along an optical path on the optical platform; a circuit board, a photodetector array being disposed on the circuit board; a mounting block, a focusing lens and an optical path shifter being disposed on t the mounting block, the mounting block being fixed on the circuit board, and the optical path shifter being placed above the photodetector array. Incident light containing a multi-channel optical signal enters through the receiver optical port, and the wavelength division multiplexer divides the incident light into a plurality of single-channel optical signal beams. The single-channel optical signal beams are coupled to photodetectors on the photodetector array after passing through the focusing lens and the optical path shifter on the mounting block.
    Type: Grant
    Filed: October 28, 2019
    Date of Patent: September 14, 2021
    Assignee: InnoLight Technology (Suzhou) Ltd.
    Inventors: Long Chen, Dengqun Yu, Yuzhou Sun
  • Patent number: 11105980
    Abstract: Embodiments of the disclosure provide a demultiplexer for processing a multiplexed optical input. The demultiplexer may include a plurality of Mach-Zehnder Interferometric (MZI) stages for converting the multiplexed optical input into a plurality of component optical signals. Each of the plurality of component optical signals corresponds to a respective wavelength-space component of the multiplexed optical input. A plurality of bandpass filters, each having a respective wavelength passband, may receive one of the plurality of component optical signals. The plurality of bandpass filters generates a plurality of demultiplexed optical signals based on the plurality of component optical signals.
    Type: Grant
    Filed: April 7, 2020
    Date of Patent: August 31, 2021
    Assignee: GLOBALFOUNDRIES U.S. INC.
    Inventors: Shuren Hu, Andreas D. Stricker, Karen A. Nummy, David B. Riggs, Kenneth J. Giewont, Jessie C. Rosenberg
  • Patent number: 11101895
    Abstract: An optical network communication system utilizes a coherent passive optical network (PON). The system includes an optical line terminal (OLT) having a downstream transmitter and an upstream receiver system configured for time-wavelength division coherent detection. The system further includes a splitter in operable communication with the OLT, and a plurality of optical network units (ONUs) in operable communication with the splitter. Each of the plurality of ONUs is configured to (i) receive downstream coherent burst signals from the OLT, and (ii) transmit at least one upstream burst signal to the OLT. The upstream receiver system further includes a power control module and a local oscillator (LO) configured to generate an optical LO signal The power control module is configured to adaptively control, in real-time, a power level of the optical LO signal.
    Type: Grant
    Filed: August 2, 2019
    Date of Patent: August 24, 2021
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Junwen Zhang, Luis Alberto Campos, Zhensheng Jia
  • Patent number: 11099455
    Abstract: An optical beam steering device may include a tunable laser diode configured to emit laser beams and an antenna that includes a grating structure and is configured to convert the laser beams to a linear light source based on the grating structure. The tunable laser diode may emit a first laser beam having a first wavelength, and emit a second laser beam having a second wavelength, the second wavelength different from the first wavelength. The antenna may receive the first laser beam and, in response, output a first linear light source having a first emission angle with a surface of the antenna. The antenna may further receive the second laser beam and, in response, output a second linear light source having a second emission angle with the surface of the antenna, the second emission angle different from the first angle.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: August 24, 2021
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong Jae Shin, Seong Gu Kim, Yong Hwack Shin, Chang Gyun Shin, Dong Sik Shim, Chang Bum Lee, Jung Ho Cha, Kyoung Ho Ha
  • Patent number: 11085800
    Abstract: A method of providing in-line Raman amplification in an optical fiber sensing system, including the procedures of generating a probe light having a probe wavelength, transmitting the probe light into an optical fiber, generating at least one Raman pump light at a respective pump wavelength, the pump wavelength being shorter than the probe wavelength, generating at least one Raman seed light at a respective seed wavelength, the seed wavelength being between the pump and probe wavelengths, transmitting the Raman pump light into the optical fiber, transmitting the Raman seed light into the optical fiber and propagating the Raman pump light, the Raman seed light and the probe light along the optical fiber to achieve distributed Raman amplification of signal light produced by the probe light as it propagates along the optical fiber.
    Type: Grant
    Filed: October 21, 2019
    Date of Patent: August 10, 2021
    Assignee: Prisma Photonics LTD.
    Inventors: Eitan Rowen, Eran Inbar
  • Patent number: 11063668
    Abstract: A multi-path multi-mode light signal aggregation, transmission, separation apparatus and method are provided. The apparatus includes a shell, an array lens module configured to turn multi-path multi-mode light signals having different frequencies and emitted by an emitting terminal and further totally reflect the light signals to a receiving terminal, an aggregation lens module configured to aggregate the turned light signals into a single-path multi-mode light signal and further disperse the single-path multi-mode light signal into the multi-path multi-mode light signals with different frequencies, and a collimation lens module configured to collimate the aggregated single-path multi-mode light signal to an optical fiber for transmission and to collimate the received single-path multi-mode light signal to the aggregation lens module. The lens modules are arranged on a substrate in the shell. The number of optical fibers and the upgrading cost can be reduced, and the communication rate is increased.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: July 13, 2021
    Assignee: HANGZHOU MO-LINK TECHNOLOGY CO. LTD
    Inventors: Hao Wang, Dong Wang
  • Patent number: 11047713
    Abstract: A laser scanning method and a laser scanning apparatus. The laser scanning method comprises: generating a periodic input laser signal with a plurality of non-overlapping wavelengths in multiple time periods within each period; coupling each wavelength of a plurality of non-overlapping wavelengths of input laser signals to the corresponding output channel of multiple spatially-separated output channels, and emitting light from each output channel at different exit angles from each other.
    Type: Grant
    Filed: May 14, 2019
    Date of Patent: June 29, 2021
    Assignee: NINGBO ONSIGHT CO., LTD.
    Inventor: Shaolan Zhu
  • Patent number: 11041955
    Abstract: Systems, methods, and other embodiments described herein relate to an antenna formed by a silicon photonic two-dimensional grating. In one embodiment, a phased-array light detection and ranging (LIDAR) device includes a phase shifting array that separately shifts a phase of a source light wave to produce separate light waves with distinct phases. The LIDAR device includes optical inputs operably connected with the phase shifting array to receive the separate light waves. The LIDAR device includes a photonic grating operably connected with the optical inputs to receive the separate light waves and having a body that is disposed within a substrate with a face of the body exposed within the substrate. The photonic grating including grating structures exposed within the face. The grating structures redirect the separate light waves to emit the light waves from the photonic grating to form the beam of light.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: June 22, 2021
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Paul Donald Schmalenberg, Tsuyoshi Nomura, Jae Seung Lee