Temporal Optical Modulation Within An Optical Waveguide Patents (Class 385/1)
  • Patent number: 11228294
    Abstract: A method of manufacturing a nanoelectromechanical resonator allows for uniform tuning of a resonant frequency. The nanoelectromechanical resonator can be mass produced and used to sense the presence of a selected gas.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: January 18, 2022
    Assignee: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
    Inventors: Michael Cullinan, Joon-Hyung Cho, David Cayll, Ian Seth Ladner
  • Patent number: 11221541
    Abstract: A digital-to-analog converter has a first interface coupled to a second interface through one or more modulation circuits. The circuits include a first coupler connected to the first interface; a first waveguide with a first lead connected to the first coupler, a first end, and a first length running therebetween. The first lead and the first end are coupled by a first switch. The circuits also include: a second coupler connected to the first interface; a second waveguide having a second lead connected to the second coupler, a second end, and a second length running therebetween, the second lead and the second end coupled by a second switch along the second length; and an optical combiner connected to the ends of the waveguides. The second interface is connected to the optical combiner of the modulation circuits. Output from the second interface is an optical signal capable of carrying binary information.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: January 11, 2022
    Assignee: The George Washington University
    Inventors: Jonathan K. George, Volker J. Sorger
  • Patent number: 11211768
    Abstract: A semiconductor optical integrated device according to the present invention includes a conductive substrate, a laser provided to the conductive substrate, a semi-insulating semiconductor layer provided on the conductive substrate, a photodiode provided on the semi-insulating semiconductor layer and a waveguide that is provided on the conductive substrate and guides output light of the laser to the photodiode, wherein an anode of the photodiode and a cathode of the photodiode are drawn from an upper surface side of the photodiode, and the waveguide and the photodiode are separated from each other by the semi-insulating semiconductor layer.
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: December 28, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Keisuke Matsumoto, Yoshimichi Morita
  • Patent number: 11209678
    Abstract: An optoelectronic device, including: a rib waveguide, the rib waveguide including: a ridge portion, which includes a temperature-sensitive optically active region, and a slab portion, positioned adjacent to the ridge portion; the device further comprising a heater, disposed on top of the slab portion wherein a part of the heater closest to ridge portion is at least 2 ?m away from the ridge portion. The device may also have a heater provided with a bottom cladding layer, and may also include various thermal insulation enhancing cavities.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: December 28, 2021
    Assignee: Rockley Photonics Limited
    Inventors: Dong Yoon Oh, Hooman Abediasl, Gerald Cois Byrd, Karlheinz Muth, Yi Zhang, Aaron John Zilkie
  • Patent number: 11101616
    Abstract: Techniques for producing a Brillouin laser are provided. According to some aspects, techniques are based on forward Brillouin scattering and a multimode acousto-optic waveguide in which light is scattered between optical modes of the waveguide via the Brillouin scattering. This process may transfer energy from a waveguide mode of pump light to a waveguide mode of Stokes light. This process may be referred to herein as Stimulated Inter-Modal Brillouin Scattering (SIMS). Since SIMS is based on forward Brillouin scattering, laser (Stokes) light may be output in a different direction than back toward the input pump light, and as such there is no need for a circulator or other non-reciprocal device to protect the pump light as in conventional devices.
    Type: Grant
    Filed: May 11, 2018
    Date of Patent: August 24, 2021
    Assignee: Yale University
    Inventors: Peter Rakich, Nils Thomas Otterstrom, Eric Andrew Kittlaus, Ryan Orson Behunin, Zheng Barton Wang
  • Patent number: 11079540
    Abstract: Two optical waveguides and an insulating film provided to cover the optical waveguides are formed over an insulating layer. Two wirings and a heater metal wire are formed over the insulating film via an insulating film different from the above insulating film. The latter insulating film is thinner than the former insulating film, and has a higher refractive index than the former insulating film. The leaked light from either of the two optical waveguides can be suppressed or prevented from being reflected by any one of the two wirings, the heater metal wire, and the like to travel again toward the two optical waveguides by utilizing the difference between the refractive indices of the two insulating films.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: August 3, 2021
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Shinichi Watanuki, Yasutaka Nakashiba
  • Patent number: 11073658
    Abstract: The present invention relates to a photonic chip realized by combining at least one Programmable Photonics Analog Block (PPAB) and at least one Reconfigurable Photonic Interconnection (RPI) implemented over a photonic chip that is capable of implementing one or various simultaneous photonics circuits and/or linear multipart transformations by the appropriate programming of its resources (i.e. PPABs and RPIs) and the selection of its input and output ports. The invention also relates to a field-programmable photonic array (FPPA) comprising at least a programmable circuit based on tunable beamsplitters with independent coupling and phase-sifting configuration and peripheral high-performance building blocks.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: July 27, 2021
    Assignee: UNIVERSITAT POLITÈCNICA DE VALÈNCIA
    Inventors: Daniel Pérez López, José Capmany Francoy, Ivana Gasulla Mestre
  • Patent number: 11054647
    Abstract: Various waveguides and image display systems are disclosed herein. In an example, an image display system can include an optical engine configured to generate an image and a waveguide. The waveguide can have a light in-coupling region formed along a peripheral edge of the waveguide, the light in-coupling region including a first surface with a first set of diffraction gratings, and a light exit region formed along a top surface of the waveguide, the light exit region including a second set of diffraction gratings. The first set of diffraction gratings can be configured to diffract light towards the second set of diffraction gratings, and the second set of diffraction gratings can be configured to diffract light towards the user's eye.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: July 6, 2021
    Assignee: Snap Inc.
    Inventors: Jun Lin, Zhibin Zhang
  • Patent number: 11048107
    Abstract: A electronic method, includes receiving, by a graphene structure, a SPP mode of a particular frequency. The electronic method includes receiving, by the graphene structure, a driving microwave voltage. The electronic method includes generating, by the graphene structure, an entanglement between optical and voltage fields.
    Type: Grant
    Filed: November 7, 2019
    Date of Patent: June 29, 2021
    Assignee: Abu Dhabi University
    Inventors: Montasir Yousof Abdallah Qasymeh, Hichem El Euch
  • Patent number: 11036017
    Abstract: In one embodiment, a module for plugging into a QSFP-DD (Quad Small Form Factor Pluggable Double Density) cage is provided that has one or more projections for contacting a QSFP-DD optical module in an adjacent QSFP-DD recess of the QSFP-DD cage so as to evacuate heat from, and or provide power to, the QSFP-DD optical module.
    Type: Grant
    Filed: November 5, 2019
    Date of Patent: June 15, 2021
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Michael Tittenhofer, Theodor Kupfer, Viktor Brauer
  • Patent number: 11018773
    Abstract: A cascaded modulator system configured to minimize the extinction ratio (ER) of an optical output of an optical transmitter. The cascaded modulator system includes a pulse position modulation (PPM) source connected to a plurality of serially-connected Mach Zehnder Interferometer (MZIs). A variable time delay ?td may be applied to a negative low voltage differential signal (LVDS) driving a second or later MZI of the plurality of MZIs to eliminate or compensate for one or more non-idealities in an electrical signal.
    Type: Grant
    Filed: October 24, 2019
    Date of Patent: May 25, 2021
    Assignee: United States of America as Represented by the Administrator of National Aeronautics and Space Administration
    Inventors: Nicholas C. Lantz, Jennifer N. Downey, Brian E. Vyhnalek
  • Patent number: 10996379
    Abstract: A plasmonic phase modulator is provided. The modulator has a conductive layer, and a dielectric layer disposed on the conductive layer. A plasmonic layer is disposed on the dielectric layer. A plasmonic layer is disposed on the dielectric layer. The plasmonic layer is conductive to surface plasmon polariton (SPP) waves. The plasmonic layer may be, for example, a graphene sheet. A voltage signal source is operatively connected between the conductive layer and the plasmonic layer for modulating a propagation speed of an SPP wave propagating on the plasmonic layer.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: May 4, 2021
    Assignees: The Research Foundation for The State University New York, The Research Foundation of CUNY
    Inventors: Josep Jornet, Prateek Kumar Singh, Gregory Aizin, Ngwe Thawdar, Michael Medley
  • Patent number: 10989599
    Abstract: A method for spectral filtering an input optical signal is described. The filtering system uses Brillouin gain inside an interferometer. The interferometer is biased to null signals that propagate without Brillouin gain, but due to asymmetric levels of gain in the interferometer arms the interference null is disturbed for signals of an optical frequency that experience Brillouin gain. The filter thereby preferentially passes signal frequencies that are inside the Brillouin gain bandwidth creating a high extinction ratio filter. The narrow bandwidth of the Brillouin gain effect can allow for spectrally narrow filters such as 30 MHz. The filter can be realized in a stable Sagnac loop configuration even if the pump and signal are combined prior to the Sagnac loop by using a power control device such as an attenuator placed asymmetrically inside the loop. The filter can achieve net gain and can be designed to have a tunable bandwidth.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: April 27, 2021
    Assignee: Nucript LLC
    Inventor: Gregory S. Kanter
  • Patent number: 10955723
    Abstract: An optical modulator has an optical input port and an optical output port provided on a same end of a substrate; an optical waveguide pair formed in the substrate and configured to form a Mach-Zehnder interferometer, one end of the optical waveguide pair being connected to the optical input port and the other end of the optical waveguide pair being connected to the optical output port, the optical waveguide pair having a bending part; a groove provided along the optical waveguide pair in the bending part; and a signal electrode that applies a high-frequency electrical signal to the optical waveguide pair, wherein the signal electrode has an expanded section having an increased cross sectional area at a section intersecting the groove.
    Type: Grant
    Filed: February 6, 2019
    Date of Patent: March 23, 2021
    Assignee: FUJITSU OPTICAL COMPONENTS LIMITED
    Inventor: Masaki Sugiyama
  • Patent number: 10901243
    Abstract: Methods and apparatus for providing all-optically generated, on-chip propagated and high-efficiency tunable plasmons are described. The plasmon generating apparatus includes a graphene based silicon nitride waveguide (GSiNW) utilizing ‘C+L’ band light sources and detectors that take advantage of the surface 2nd nonlinearity on graphene. The optical generation is accomplished via one or more optical communication lasers through the difference-frequency generation process. The THz frequency and intensity is tunable via an external gate voltage. Using such a device the optical to THz conversion may be made at least an order of magnitude more efficient than prior THz sources, and can be used to make chip-scale room-temperature THz sources, switches, modulators and detectors based on graphene.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: January 26, 2021
    Assignee: The Regents of the University of California
    Inventors: Chee Wei Wong, Baicheng Yao, Yuan Liu, Xiangfeng Duan
  • Patent number: 10901242
    Abstract: Provided is a driving device for PWM control of voltage pulses for controlling the temperature of a heater in a phase controller, the driving device being capable of increasing the response speed of an optical element such as an optical switch. Phase controllers include first and second heaters for changing the temperatures of first and second optical waveguides extending in parallel. Driving devices include pulse generation circuits that generate voltage pulses to apply to the first and second heaters. To start raising the temperature of the second heater, the pulse generation circuit generates a first voltage pulse and consecutive second voltage pulses to apply to the second heater with zero voltage pulse being applied to the first heater, the first voltage pulse having a long pulse width and the second voltage pulses following the first voltage pulse and having a shorter pulse width than the first voltage pulse.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: January 26, 2021
    Assignee: National Institute of Advanced Industrial Science and Technology
    Inventors: Ken Tanizawa, Hiroyuki Matsuura, Satoshi Suda, Haruhiko Kuwatsuka, Keijiro Suzuki, Guangwei Cong, Kazuhiro Ikeda, Hitoshi Kawashima, Shu Namiki
  • Patent number: 10895683
    Abstract: A semiconductor device includes an insulating layer, an optical waveguide formed on the insulating layer, a multilayer wiring layer formed on the insulating layer such that the multilayer wiring layer covers the optical waveguide, and a first inductor formed in the multilayer wiring layer.
    Type: Grant
    Filed: October 14, 2019
    Date of Patent: January 19, 2021
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Teruhiro Kuwajima, Yasutaka Nakashiba
  • Patent number: 10866438
    Abstract: A Faraday-based polarization scrambler is disclosed. The Faraday-based polarization scrambler may comprise a first toroidal assembly. The first toroidal assembly may include an optical fiber that is looped to form a first looped portion, and a first electrical wire that coils around the first looped portion to form a first toroidal configuration. In some examples, the first electrical wire may be connected to a voltage source and carries a current to form a magnetic field within the first toroidal configuration. In some examples, there may be additional toroidal assemblies provided to the Faraday-based polarization scrambler. One or more of these toroidal assemblies may create an actuation field to effect modulation for polarization scrambling and emulation that mitigates polarization-dependent effects.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: December 15, 2020
    Assignee: VIAVI SOLUTIONS INC.
    Inventors: Joshua Philipson, Christopher Russell Wagner
  • Patent number: 10828894
    Abstract: An actuator includes an actuator substrate and a diaphragm forming an inner wall defining a space in the actuator substrate. The diaphragm includes a first layer made of material that does not transmit light of a specific wavelength; a second layer made of material that transmits the light of a specific wavelength; an active region covering a central area of the diaphragm, the active region including the first layer and the second layer; and at least two transmissive regions formed at a circumference of the diaphragm, each of the at least two transmissive regions including the second layer without the first layer.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: November 10, 2020
    Assignee: Ricoh Company, Ltd.
    Inventor: Takahiko Kuroda
  • Patent number: 10833056
    Abstract: The invention relates to an electrooptical device comprising a semiconductor substrate having a front side and a back side, at least one photonic component arranged on the front side of the semiconductor substrate, the photonic component comprising an active layer made of a non-linear optical material, wherein at least one cavity, extends through the semiconductor substrate and connects the active layer on the front side of the semiconductor substrate with the back side of the semiconductor substrate.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: November 10, 2020
    Assignee: IHP GMBH—INNOVATIONS FOR HIGH PERFORMANCE MICROELECTRONICS/LEIBNIZ-INSTITUT FUR INNOVATIVE MIKROELEKTRONIK
    Inventors: Patrick Steglich, Andreas Mai, Christian Mai, Sigurd Schrader
  • Patent number: 10812183
    Abstract: An apparatus for mitigating polarization dependent loss (PDL) in an optical signal-to-noise ratio (OSNR) of a modulated optical signal is disclosed. The apparatus may comprise a spectrum analyzer to measure an optical power spectrum of a modulated optical signal. The apparatus may also comprise a measuring unit to select a first portion of the modulated optical signal and a second portion of the modulated optical signal, where each of the first and second portions of the modulated optical signals may include an independent noise distribution indicative of PDL, and measure a time-varying parameter of the first and second portions. The apparatus may also include a signal processor to PDL in an OSNR by transforming any elliptical polarization associated with the independent noise distribution into a ball polarization, determining a correlation between time-varying parameters of the first and second portions, and calculating a PDL mitigated OSNR.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: October 20, 2020
    Assignee: VIAVI SOLUTIONS INC.
    Inventor: Georg Rudolph
  • Patent number: 10788726
    Abstract: An optical modulator includes an optical modulation element having a plurality of signal electrodes; a plurality of signal input terminals each of which inputs an electrical signal to be applied to each signal electrode; a relay substrate on which a plurality of signal conductor patterns electrically connecting the signal input terminals and the signal electrodes, and a plurality of ground conductor patterns are formed; and a housing that houses the optical modulation element and the relay substrate, in which the relay substrate has at least one groove extending from the signal input side on which the signal input terminal is connected to the signal conductor pattern, in at least one ground conductor pattern formed between adjacent signal conductor patterns, and the groove is formed such that a length extending from the signal input side is longer than a length of the signal input terminal extending on the signal conductor pattern.
    Type: Grant
    Filed: October 28, 2019
    Date of Patent: September 29, 2020
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Norikazu Miyazaki, Toru Sugamata
  • Patent number: 10775561
    Abstract: An optoelectronic component includes a chip having a substrate and at least one optical waveguide integrated in the chip. The electro-optical component may be monolithically integrated in one or a plurality of semiconductor layers of the chip arranged on the substrate top side of the substrate, or on the substrate top side of the substrate. At least one electrical connection of the monolithically integrated electro-optical component is connected by means of a connection line to a conductor track connection situated below the substrate rear side. The connection line extends through a hole in the substrate from the electro-optical component to the conductor track connection situated below the substrate rear side.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: September 15, 2020
    Assignee: TECHNISCHE UNIVERSITÄT BERLIN
    Inventors: Stefan Meister, Hanjo Rhee, Christoph Theiss, Sebastian Kupijai
  • Patent number: 10775651
    Abstract: This disclosure provides systems, methods, and apparatus related to optical modulators. In one aspect, a device includes a substrate, a first electrically insulating material disposed over the substrate, a first graphene layer and a second graphene layer disposed in the first electrically insulating material and being separated by the first electrically insulating material, and a waveguide disposed on the first electrically insulating material. At least a portion of the second graphene layer overlays at least a portion of the first graphene layer. The waveguide overlays both the first graphene layer and the second graphene layer.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: September 15, 2020
    Assignee: The Regents of the University of California
    Inventors: Hamed Dalir, Yang Xia, Yuan Wang, Xiang Zhang
  • Patent number: 10770374
    Abstract: The present disclosure relates to semiconductor structures and, more particularly, to through-silicon vias (TSV) for heterogeneous integration of semiconductor device structures and methods of manufacture. The structure includes: a plurality of cavity structures provided in a single substrate; at least one optical device provided on two sides of the single substrate and between the plurality of cavity structures; and a through wafer optical via extending through the substrate, between the plurality of cavity structures and which exposes a backside of the at least one optical device.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: September 8, 2020
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Siva P. Adusumilli, Steven M. Shank
  • Patent number: 10768365
    Abstract: A method for fabricating a photonic integrated circuit (PIC) comprises providing a silicon-on-insulator (SOI) wafer comprising an insulator layer disposed between a base semiconductor layer and a SOI layer, wherein the SOI layer comprises a waveguide, providing at least one slot within the SOI layer, wherein the at least one slot is positioned on the same or opposite sides of the waveguide, and wherein the at least one slot is positioned at a predetermined distance away from the waveguide, and removing a portion of the insulator layer to form an etched-out portion of the insulator layer, wherein the etched-out portion is positioned directly beneath the waveguide, and wherein a width of the etched-out portion is at least the width of the waveguide.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: September 8, 2020
    Assignee: Futurewei Technologies, Inc.
    Inventors: Dawei Zheng, Ge Yi, Li Yang, Xiao Shen
  • Patent number: 10754143
    Abstract: An optical scanning method includes detecting a resonance frequency of a tip of a fiber while sweeping a vibration frequency of the tip of the fiber over a predetermined frequency range, the tip of the fiber being supported to allow oscillation, determining a driving frequency of the tip of the fiber on the basis of the detected resonance frequency, and scanning light over an object by causing the light to be emitted from the tip of the fiber while driving and vibrating the tip of the fiber at the driving frequency.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: August 25, 2020
    Assignee: OLYMPUS CORPORATION
    Inventor: Ken Fujinuma
  • Patent number: 10754221
    Abstract: An optical device may include a waveguide-based Mach-Zehnder (MZ) interferometer associated with performing polarization multiplexing or demultiplexing. The waveguide-based MZ interferomenter may include a first MZ arm, a second MZ arm, and a set of stress-balancing trenches. A portion of the first MZ arm may be between at least two stress-reducing trenches of a plurality of stress-reducing trenches. The plurality of stress-reducing trenches may be in a cladding layer on a substrate. The set of stress-balancing trenches may be on an opposite side of the second MZ arm from the plurality of stress-reducing trenches. The set of stress-balancing trenches may be in the cladding layer on the substrate.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: August 25, 2020
    Assignee: Lumentum Operations LLC
    Inventor: Hiroaki Yamada
  • Patent number: 10739624
    Abstract: An optical control element including an optical waveguide formed by using diffusion of titanium that is formed on a lithium niobate substrate and a control electrode formed on the lithium niobate substrate that is provided in the vicinity of the optical waveguide, in which an amount of a hydroxyl group absorbed into the lithium niobate substrate is set to be in a range of 0.5 to 2.5 cm?1.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: August 11, 2020
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Yuji Yamane, Tetsuya Fujino, Hideki Ichimei
  • Patent number: 10739390
    Abstract: A system is provided for use with an optical input signal for detecting a phase difference between a first RF signal having a first phase and a second RF signal having a second phase. The system includes and optical waveguide, a first optical resonant cavity, a first RF receiver, a second optical resonant cavity and a second RF receiver. The optical resonant cavities include a non-linear electro-optical material. The first RF receiver affects the first non-linear electro-optical material of the first optical resonant cavity. The second RF receiver affects the second non-linear electro-optical material of first optical resonant cavity. The optical waveguide outputs an optical output signal based on the optical input signal as modified by the first optical resonant cavity as affected by the first RF receiver receiving the first RF signal and as modified by the second optical resonant cavity as affected by the second RF receiver.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: August 11, 2020
    Assignee: United States of America as represented by the Secretary of the Navy
    Inventors: Stephanie Claussen, Benjamin J. Taylor, Anna M. Leese de Escobar
  • Patent number: 10732481
    Abstract: To provide a highly-reliable low-cost small optical modulator in which temperature drift is suppressed and an optical transmission device using the same. An optical modulator including an optical waveguide substrate 1 on which an optical waveguide is formed, a signal electrode which is provided on the optical waveguide substrate and applies an electric field to the optical waveguide, a termination substrate 3 provided with a termination resistor that terminates the signal electrode, and a housing 6 in which the optical waveguide substrate and the termination substrate are mounted, in which, in order to suppress conduction of heat generated from the termination resistor to the optical waveguide substrate through the housing, a groove 8 is formed in the housing 6 between the termination substrate 3 and the optical waveguide substrate 1.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: August 4, 2020
    Assignee: Sumitomo Osaka Cement Co., Ltd.
    Inventor: Toru Sugamata
  • Patent number: 10684530
    Abstract: Structures for an electro-optic modulator and methods of fabricating a structure for an electro-optic modulator. An electro-optic modulator is arranged over a portion of a waveguide core. The electro-optic modulator includes an electrode, an active layer arranged adjacent to the electrode, and a dielectric layer including a portion that has a lateral arrangement between the electrode and the active layer. The active layer is composed of a material having a refractive index that is a function of a bias voltage applied to the electrode and the active layer.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: June 16, 2020
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Yusheng Bian, Ajey Poovannummoottil Jacob, Abu Thomas
  • Patent number: 10678113
    Abstract: Systems and methods are provided for a low impedance optical modulator in an optical device. The optical device includes a distributed amplifier having a plurality of gain stages and is configured to receive a radio frequency (RF) signal at an input of the distributed amplifier having a first impedance and provide an amplified version of the RF signal with a voltage gain produced through the plurality of gain stages to an output of the distributed amplifier having a second impedance smaller than the first impedance. The optical device includes an optical modulator coupled to the distributed amplifier and is configured to receive the amplified version of the RF signal at an input of the optical modulator having a same impedance as the output of the distributed amplifier and modulate the amplified version of the RF signal to produce an intensity modulated optical signal at an output of the optical modulator.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: June 9, 2020
    Assignee: LOCKHEED MARTIN CORPORATION
    Inventors: Anthony C. Kowalczyk, Xipeng Sui, Nicholas D. Saiz
  • Patent number: 10670804
    Abstract: Waveguiding structures and methods of fabricating a waveguiding structure. The waveguiding structure includes a waveguide and an array of semiconductor fins that are arranged at least in part inside the waveguide.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: June 2, 2020
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Yusheng Bian, Abu Thomas, Ajey Poovannummoottil Jacob
  • Patent number: 10670942
    Abstract: The invention relates to an optical device (100) comprising: a waveguide (200) comprising a core (210) extending along an axis of symmetry XX?, and encapsulated in a cladding layer (220), an actuator (400) with width La, overlapping the core (210) and extending along an axis of symmetry YY? parallel to the axis of symmetry XX?, said actuator (400) is designed so that when a voltage is applied to it, it imposes a mechanical stress at the core (210) to modify its refraction index the device being characterised in that the second axis of symmetry YY? is offset by a lateral offset D from a plane of symmetry of the waveguide (200) including the first axis of symmetry and perpendicular to the cladding layer (220), the lateral offset is between 15% and 50% of the width La.
    Type: Grant
    Filed: January 10, 2019
    Date of Patent: June 2, 2020
    Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventors: Fabrice Casset, Thierry Hilt
  • Patent number: 10606067
    Abstract: A drive-condition setting device applied to an optical scanning apparatus having a fiber and an actuator that vibrates a distal end of the fiber, the drive-condition setting device detects a scan pattern of the illumination light output from the fiber, measures resonance frequencies in the x direction and the y direction of the fiber, sets a drive frequency and a drive voltage based on the resonance frequencies such that conditional expressions below are satisfied: when fx>fy, fd<fy and Vx?Vy (1) or fd>fx and Vx?Vy (2), and when fx?fy, fd<fx and Vx?Vy (3) or fd>fy and Vx?Vy (4) where fd denotes the drive frequency, Vx denotes a maximum voltage of a X direction drive signal, and Vy denotes a maximum voltage of a y direction drive signal.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: March 31, 2020
    Assignee: OLYMPUS CORPORATION
    Inventors: Atsuyoshi Shimamoto, Masashi Yamada, Soichiro Koshika
  • Patent number: 10598832
    Abstract: Embodiments herein provide systems and methods for forming an optical component. A method may include providing a plurality of proximity masks between a plasma source and a workpiece, the workpiece including a plurality of substrates secured thereto. Each of the plurality of substrates may include first and second target areas. The method may further include delivering, from the plasma source, an angled ion beam towards the workpiece, wherein the angled ion beam is then received at one of the plurality of masks. A first proximity mask may include a first set of openings permitting the angled ion beam to pass therethrough to just the first target area of each of the plurality of substrates. A second proximity mask may include a second set of openings permitting the angled ion beam to pass therethrough just to the second target area of each of the plurality of substrates.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: March 24, 2020
    Assignee: Varian Semiconductor Equipment Associates, Inc.
    Inventors: Morgan Evans, Rutger Meyer Timmerman Thijssen, Joseph Olson, Peter Kurunczi, Robert Masci
  • Patent number: 10543065
    Abstract: An intraoral scanner includes an image sensor, a projection module, a motion sensor, a memory unit and a processor. The motion sensor senses three motion variations corresponding to three axes according to a motion state of the intraoral scanner. The memory unit stores three first variation thresholds corresponding to the three axes. The processor determines whether the three motion variations are smaller than or equal to the three first variation thresholds, respectively. When the processor determines that at least one of the three motion variations is smaller than or equal to the three first variation thresholds, the processor enables the image sensor and the projection module. When the processor determines that all of the three motion variations are larger than the three first variation thresholds, the processor disables at least one of the image sensor and the projection module.
    Type: Grant
    Filed: January 17, 2019
    Date of Patent: January 28, 2020
    Assignee: Qisda Corporation
    Inventors: Chi-Cheng Lin, Chuang-Wei Wu, Tsung-Hsi Lee
  • Patent number: 10530487
    Abstract: A distributed traveling-wave Mach-Zehnder modulator driver having a plurality of modulation stages that operate cooperatively (in-phase) to provide a signal suitable for use in a 100 Gb/s optical fiber transmitter at power levels that are compatible with conventional semiconductor devices and conventional semiconductor processing is described.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: January 7, 2020
    Assignee: Elenion Technologies, LLC
    Inventors: Ran Ding, Thomas Wetteland Baehr-Jones, Michael J. Hochberg, Alexander Rylyakov
  • Patent number: 10502948
    Abstract: A fiber scanning system can have optimized performance by substantially matching the natural frequencies of the fiber scanning system's actuator and fiber optic scanning element. By matching the natural frequencies, the fiber scanning system can increase the maximum distance that the tip of the fiber optic scanning element may be driven relative to a resting position. Such an effect may be produced because matching the natural frequencies of the fiber scanner allows for larger amplitudes to be achieved. It should be noted that the natural frequency of the scanning system can be selected to avoid excitation frequencies that could destabilize the system. In this way, the system as a whole may act as a tuned mass damper or a tuned resonance structure, thereby improving scan performance while maintaining a stable scanning system.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: December 10, 2019
    Assignee: MAGIC LEAP, INC.
    Inventors: Timothy Mark Dalrymple, Alejandro Lopez, William K. Jones, Jr., Andrew C. Duenner
  • Patent number: 10446917
    Abstract: Deformable magnetic antennas are provided to include a plurality of flexible magnetic antenna layers stacked to form a layered magnetic antenna structure that is bendable. Each flexible magnetic antenna layer includes a magnetic material that confines a magnetic field to concentrate a magnetic flux of the magnetic field inside the magnetic antenna layer. A lubricating material is applied between adjacent flexible magnetic antenna layers to allow adjacent magnetic layers to move relative to one another when the layered magnetic antenna structure is bent so as to reduce a stress in each flexible magnetic antenna layer caused by bending the layered magnetic antenna structure.
    Type: Grant
    Filed: December 3, 2016
    Date of Patent: October 15, 2019
    Assignee: General Atomics
    Inventors: Mark Eugene Bonebright, Mark William Covington, Jeffrey Howard Caton
  • Patent number: 10444551
    Abstract: Embodiments may relate to a transmission line to be coupled with an electromagnetic waveguide. The transmission line may include a signal node with a first contact, a second contact, and a via between first contact and the second contact. The transmission line may further include a ground node with a third contact, a fourth contact, and a via between the third contact and the fourth contact. Other embodiments may be described or claimed.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: October 15, 2019
    Assignee: Intel Corporation
    Inventors: Jeffrey B. Driscoll, Ling Liao, David Patel
  • Patent number: 10429583
    Abstract: An optical branching waveguide disclosed herein includes: a substrate; a first optical waveguide provided on the substrate; a second optical waveguide provided on the substrate and arranged close to the first optical waveguide; and a cladding layer covering either one of a first portion of the first optical waveguide and a second portion of the second optical waveguide and including an opening the other one of the first portion and the second portion. The effective refractive index of the first optical waveguide at the first portion and the effective refractive index of the second optical waveguide at the second portion become equal in either one of a state where resin is present in the opening and a state where the resin is not present in the opening.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: October 1, 2019
    Assignee: FUJITSU LIMITED
    Inventor: Akio Sugama
  • Patent number: 10425155
    Abstract: Provided are a device and method for free space coherent optical communications by means of an automatic compensation for phase noise in atmosphere using a femtosecond laser optical comb, and more particularly, a device and method for free space coherent optical communications by means of an automatic compensation for phase noise in atmosphere using a femtosecond laser optical comb, in which a phase shift value due to atmospheric turbulence is obtained from reflected light of transmission light generated from a femtosecond laser optical comb and the transmission light is pre-distorted on the basis of the phase shift value, thereby pre-compensating, in a transmission end, for phase noise due to atmospheric turbulence.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: September 24, 2019
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Seung-Woo Kim, Young-Jin Kim, Byung Jae Chun, Hyun Jay Kang
  • Patent number: 10418943
    Abstract: A method for down-converting an RF signal is described that optically phase modulates an RF signal onto an optical carrier then applies an RF local oscillator (LO) phase modulation which down-converts the RF signal to an intermediate frequency after appropriate optical signal processing and optical-to-electrical photo-detection. The LO phase modulator is constructed such that a common hot electrode is shared among more than one optical mode, where an optical mode can be separate waveguides or optical wavelengths. The relative phase of the LO frequency applied to each optical mode can be different between the different optical modes. The resulting down-converted photo-detected signals of different LO-phase can be processed to reduce noise. A single LO phase modulator can down-convert multiple RF signals carried by multiple optical wavelengths, and a harmonic generation stage with multi-phase-matching peaks can be used to linearize each RF signal.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: September 17, 2019
    Assignee: Nucript LLC
    Inventor: Gregory S. Kanter
  • Patent number: 10414001
    Abstract: To provide a galvanometer scanner that increases reliability by reducing burden on a mechanism unit. A galvanometer scanner converts a command for machining position on a machining target to movement commands for a rotary motor, a rotary motor, and a direct drive mechanism. If the movement command for the direct drive mechanism contains a weak direct drive component depending on the movement command for the rotary motor, and falling within an amplitude range not exceeding a predetermined amplitude and within a frequency range not falling below a predetermined frequency, the galvanometer scanner removes the weak direct drive component from the movement command for the direct drive mechanism, and then outputs control signals corresponding to the movement commands for the rotary motors and the direct drive mechanism. The galvanometer scanner controls the rotary motors and the direct drive mechanism based on the control signals.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: September 17, 2019
    Assignee: FANUC CORPORATION
    Inventors: Yoshinori Murakami, Satoru Kawai
  • Patent number: 10401658
    Abstract: Provided is an optical modulator including: a relay substrate; a first transmission line that is provided on a flat surface of the relay substrate, and transmits an electrical signal along the flat surface; a second transmission line that is provided separately from the relay substrate, is electrically connected to the first transmission line, and transmits, to the first transmission line, the electrical signal that has been input from an outer side in a direction that is not included in the flat surface; a modulation unit that modulates an optical signal by using the electrical signal that is transmitted by the first transmission line and the second transmission line; and a shield that shields a radiation component of the electrical signal that is radiated from the second transmission line.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: September 3, 2019
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Toshio Kataoka, Kei Kato, Junichiro Ichikawa
  • Patent number: 10320488
    Abstract: A distributed traveling-wave Mach-Zehnder modulator driver having a plurality of modulation stages that operate cooperatively (in-phase) to provide a signal suitable for use in a 100 Gb/s optical fiber transmitter at power levels that are compatible with conventional semiconductor devices and conventional semiconductor processing is described.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: June 11, 2019
    Assignee: Elenion Technologies, LLC.
    Inventors: Ran Ding, Thomas Wetteland Baehr-Jones, Michael J. Hochberg, Alexander Rylyakov
  • Patent number: 10305599
    Abstract: In an optical transmitter module for combining three or more optical signals different in intensity with an optical multiplexer to generate a PAM signal, the influence of the beat noise and the chromatic dispersion due to the difference in wavelength is reduced. The optical transmitter module includes first through third optical signal sources adapted to output respective optical signals binary intensity modulated with different amplitude from each other, and a combining section. The combining section has a wavelength multiplexer adapted to wavelength-multiplex a plurality of input optical signals having different wavelengths from each other while keeping the respective polarization states, and a polarization multiplexer adapted to polarization-multiplex a pair of input optical signals having respective polarization states perpendicular to each other, and the combining section combines the input optical signals from the first through third optical signal sources with each other to generate a PAM8 signal.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: May 28, 2019
    Assignee: Oclaro Japan, Inc.
    Inventors: Kouji Nakahara, Hiroaki Inoue
  • Patent number: 10295738
    Abstract: An electro-optical modulator is provided. The modulator comprises a first and a second optical waveguide, at least one first capacitance, via which a voltage can be applied to a light-guiding region of the first optical waveguide, at least one second capacitance, via which a voltage can be applied to a light-guiding region of the second optical waveguide, an electrically conductive region, via which the first and second capacitances are electrically connected to one another, and a feed line to the electrically conductive region, via which feed line a DC voltage can be applied to the electrically conductive region, wherein the feed line is constituted such that it represents an electrical resistance connected in parallel with the second capacitance, and a compensation resistance connected in parallel with the first capacitance and serving for reducing transients in a voltage profile on the first and second capacitances during the operation of the modulator.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: May 21, 2019
    Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventor: Heinz-Gunter Bach