Optical Waveguide Sensor Patents (Class 385/12)
  • Patent number: 10741308
    Abstract: An electrical cable includes a conductor assembly having a first conductor, a second conductor and an insulator surrounding the first conductor and the second conductor. The insulator has an outer surface. The conductor assembly extends along a longitudinal axis for a length of the electrical cable. The first conductor has a first core and a first conductive layer on the first core. The second conductor has a second core and a second conductive layer on the second core. The first and second cores are dielectric. The electrical cable includes a cable shield around the conductor assembly engaging the outer surface of the insulator and providing electrical shielding for the first and second conductors. The cable shield extends along the longitudinal axis.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: August 11, 2020
    Assignee: TE CONNECTIVITY CORPORATION
    Inventors: Craig Warren Hornung, Chad William Morgan
  • Patent number: 10724922
    Abstract: Devices, systems and techniques for measuring optical polarization-related parameters in optical materials and devices such as polarization maintaining (PM) fiber links based on polarization crosstalks that spatially distribute over a length of a material such as a PM fiber link.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: July 28, 2020
    Assignees: General Photonics Corporation, Suzhou Optoring Technology Co. Ltd.
    Inventors: Xiaotian Steve Yao, Xiaojun Chen
  • Patent number: 10718711
    Abstract: A sensing apparatus, system, and use method for selective detection of a target molecule in a gaseous medium with a limit of detection of less than 50 ppm are provided. The sensing apparatus comprises an optical fiber having a core with a tilted grating, and a coating assembly that is both active to surface plasmon resonance (SPR) and reversibly reactive to the target molecule to allow for repeated detection. Upon a compatible light propagating in the optical fiber, surface plasmon waves at an interface between the coating assembly and the medium can be generated to thereby derive information of the target molecule. Signals from core mode optical waves can additionally be used as inherent reference to remove influences of fluctuations from environmental factors and input power level. There is at least one range of concentrations for the target molecule allowing for linear measurement. Multiplexing of a plurality of sensing apparatuses is also disclosed.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: July 21, 2020
    Assignee: JINAN UNIVERSITY
    Inventors: Tuan Guo, Christophe Caucheteur, Fu Liu, Xuejun Zhang, Shunshuo Cai
  • Patent number: 10705353
    Abstract: A pupil-replicating waveguide suitable for operation with a coherent light source is disclosed. A waveguide body has opposed surfaces for guiding a beam of image light. An out-coupling element is disposed in an optical path of the beam for out-coupling portions of the beam at a plurality of spaced apart locations along the optical path. Electrodes are coupled to at least a portion of the waveguide body for modulating an optical path length of the optical path of the beam to create time-varying phase delays between the portions of the beam out-coupled by the out-coupling element.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: July 7, 2020
    Assignee: Facebook Technologies, LLC
    Inventors: Andrew Maimone, Andrew Ouderkirk, Hee Yoon Lee, Ningfeng Huang, Maxwell Parsons, Scott Charles McEldowney, Babak Amirsolaimani, Pasi Saarikko, Wanli Chi, Giuseppe Calafiore, Alexander Koshelev, Barry David Silverstein, Lu Lu, Wai Sze Tiffany Lam, Gang Li, Stephan Lutgen, Francois Olivier, David Massoubre
  • Patent number: 10659178
    Abstract: Fronthaul monitoring systems and methods include a Radio Frequency (RF) analysis module configured to receive an optical RF signal for RF testing thereof; a fiber monitoring module configured to perform fiber monitoring testing; an optical switch configured to switch a port connected to the RF analysis module and the fiber monitoring module between one or more Remote Radio Heads (RRH); and a test coordinator software module configured to coordinate the RF testing and the fiber monitoring testing. The optical RF signal is at different wavelengths than a fiber test signal for the fiber monitoring testing, such that the RF testing and the fiber monitoring testing can be performed concurrently.
    Type: Grant
    Filed: October 12, 2018
    Date of Patent: May 19, 2020
    Assignee: EXFO Inc.
    Inventors: Jean-Sébastien Martel, Stéphane Perron
  • Patent number: 10648876
    Abstract: Disclosed herein is an optical cable comprising a plurality of cable sensors helically wound around a support; and an outer jacket that is disposed on the plurality of cable sensors and surrounds the plurality of cable sensors; where each cable sensor comprises an optical fiber; where the optical fiber comprises an optical core upon which is disposed a cladding; a primary coating; a deformable material surrounding the optical fiber; and an outer tube surrounding the deformable material; where the optical fiber is of equal length to the outer tube; and where an allowable strain on the optical cable with zero stress on the optical fiber is determined by equations (1) and (2) below: ? = ? 2 ? ( D + d 2 ) 2 + p 2 p - ? 2 ? ( D - d 2 ) 2 + p 2 p = ? 2 ? dD p 2 = 10 ? ? dD p 2 ( 1 ) ? × 100 = Percent ? ? elongation ? ? or ? ? contraction ; ( 2 ) where d is the amount of optical fiber clearance for free movement
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: May 12, 2020
    Assignee: OFS FITEL, LLC
    Inventors: Robert S Dyer, Jie Li, John E Pacini, Brian Violette
  • Patent number: 10622786
    Abstract: To realize a reservoir computing system with a small size and reduced learning cost, provided is a laser apparatus including a laser; a feedback waveguide that is operable to feed light output from the laser back to the laser; an optical splitter that is provided in a path of the feedback waveguide and is operable to output a portion of light propagated in the feedback waveguide to outside; and a first ring resonator that is operable to be optically connected to the feedback waveguide, as well as a reservoir computing system including this laser apparatus.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: April 14, 2020
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Daiju Nakano, Seiji Takeda, Toshiyuki Yamane
  • Patent number: 10613033
    Abstract: A chemical sensor, including a porous optical waveguide. The loss or index of refraction, or both, of the porous waveguide is affected by the presence of one or more chemicals of interest.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: April 7, 2020
    Assignee: Rockley Photonics Limited
    Inventors: Yi Zhang, Aaron John Zilkie, Haydn Frederick Jones, Adam Scofield
  • Patent number: 10598544
    Abstract: Embodiments of the present disclosure include a low crosstalk, optical fiber based disturbance detection system that includes single-mode optical fiber (SMF) arranged into dual ring Sagnac interferometer wherein both rings share a common sensing section of optical fiber path length. Certain embodiments further include fiber Bragg gratings (FBG's), circulators and couplers to be able to separate the optical signals of the two rings of the dual ring Sagnac interferometer and to perform processing of their individual signals. Embodiments are also disclosed that enable the position of a physical disturbance, the magnitude of the physical disturbance and the frequency of the physical disturbance to be known.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: March 24, 2020
    Inventors: Yi Yang, Trevor MacDougall
  • Patent number: 10600266
    Abstract: The invention relates to a mounted module (20) for a motor vehicle (1), comprising an optical sensor system (3) that is suitable for a) monitoring a detection area (21) located outside the vehicle (1), b) triggering a signal for starting an authentication process between an ID generator (13) and the motor vehicle (1) if a user (10) is detected in the detection area (21), c) monitoring an actuation area (22) which is located outside the vehicle (1) and differs from the detection area (21), d) providing an operating signal for the vehicle (1) if a user is detected in the actuation area (22).
    Type: Grant
    Filed: January 7, 2015
    Date of Patent: March 24, 2020
    Assignee: Huf Hülsbeck & Fürst GmbH & Co. KG
    Inventors: Alexander Ziegler, Helmut Schumacher, Norbert Heller, Oliver Müller, Bernd Ette, Nadine Sticherling, Mirko Schindler, Jean Malabo Yomkil, Stefan Mönig, Iko Lindic, Christof Hache
  • Patent number: 10595816
    Abstract: A system for tracking an instrument including an intraoperative transducer array configured to generate signals from array positions to generate real-time images of an area of interest. The instrument can be a penetrating instrument having a sensor mounted at a position of interest and being responsive to the signals from the array positions. A signal processing module can be provided and configured to determine a position and orientation of the instrument in accordance with the signals and to classify media of the position of interest based upon a response of the sensor to the signals from the array positions. An overlay module can be provided and configured to generate an overlay image registered to the real-time images to identify a position of the position of interest and provide feedback on the media in which the position of interest is positioned. A display can be provided and configured to provide visual feedback of the overlay image on the real-time images.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: March 24, 2020
    Assignee: KONONKLIJKE PHILIPS N.V.
    Inventors: Amir Mohammad Tahmasebi Maraghoosh, Guy Gerard Marie Vignon, Ameet Kumar Jain
  • Patent number: 10588703
    Abstract: A system comprises a first cannula comprising a proximal end and a cannula opening at the proximal end. The system further comprises a teleoperated surgical instrument, and a manually operated surgical instrument configured to be inserted into the cannula opening. The system further comprises a teleoperated manipulator, a controller, and a first position sensor coupled to the teleoperated surgical instrument, the first position sensor configured to provide a first sensor input to the controller. The system further comprises a second position sensor coupled to the manually operated surgical instrument, the second position sensor configured to provide a second sensor input to the controller, the second sensor input comprising an insertion depth of the manually operated surgical instrument into the first cannula.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: March 17, 2020
    Assignee: INTUITIVE SURGICAL OPERATIONS, INC.
    Inventors: Giuseppe Maria Prisco, Theodore W. Rogers, Vincent Duindam, Myriam J. Curet, Catherine J. Mohr, Katherine D. Stoy
  • Patent number: 10578464
    Abstract: A distributed temperature sensing (DTS) system is connected to a buried fiber optic cable that is used to monitor a structure. The DTS system is operated to obtain temperature measurements along the length of the fiber cable. The temperature measurements are then used to calculate a measure of diurnal temperature variability at each point along the cable. This calculation is used to identify points at which the diurnal temperature variability changes rapidly over a short length of the cable. These points can be identified with features along the cable, such as splice chambers, where the cable burial conditions change. The known geographic location of these features can then be identified with specific distances along the fiber.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: March 3, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: Maxwell Richard Hadley
  • Patent number: 10578738
    Abstract: A laser radar system using collocated laser beams to unambiguously detects a range of a target and a range rate at which the target is moving relative to the laser radar system. Another aspect of various embodiments of the invention may relate to a laser radar system that uses multiple laser radar sections to obtain multiple simultaneous measurements (or substantially so), whereby both range and range rate can be determined without various temporal effects introduced by systems employing single laser sections taking sequential measurements. In addition, other aspects of various embodiments of the invention may enable faster determination of the range and rate of the target, a more accurate determination of the range and rate of the target, and/or may provide other advantages.
    Type: Grant
    Filed: January 4, 2018
    Date of Patent: March 3, 2020
    Assignee: StereoVision Imaging, Inc.
    Inventors: Richard Lee Sebastian, Kendall L. Belsley
  • Patent number: 10564092
    Abstract: The invention is an electromechanical resonator, comprising a fixed portion and an oscillator oscillating at a resonant frequency and comprising a fluidic channel. The channel defines a fluidic circuit, can receive a fluid, and can be deformed at the resonant frequency. The resonator includes a waveguide, defining a photonic circuit, guiding a light wave between an input and an output of the waveguide and being able to be deformed at the resonant frequency. The waveguide input can be connected to a light source and the waveguide output can be connected to a photodetector able to form a signal representative of the light wave propagated by the waveguide towards the photodetector, the light wave being modulated at a frequency dependent on the resonant frequency. A variation in a mass of the fluid, inducing a variation in the resonant frequency, may be detected via the signal formed by the photodetector.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: February 18, 2020
    Assignee: Commissariat a l'energie atomique et aux energies alternatives
    Inventors: Leopold Virot, Vincent Agache, Jean-Marc Fedeli, Sebastien Hentz
  • Patent number: 10551173
    Abstract: A multi-core fiber includes multiple optical cores, and for each different core of a set of different cores of the multiple optical cores, a total change in optical length is detected. The total change in optical length represents an accumulation of all changes in optical length for multiple segments of that different core up to a point on the multi-core fiber. A difference is determined between the total changes in optical length for cores of the set of different cores. A twist parameter and/or a bend angle associated with the multi-core fiber at the point on the multi-core fiber is/are determined based on the difference.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: February 4, 2020
    Assignee: Intuitive Surgical Operations, Inc.
    Inventors: Mark E. Froggatt, Justin W. Klein, Dawn K. Gifford, Stephen T Kreger
  • Patent number: 10545060
    Abstract: A sensor system (10) and method for monitoring a powertrain (20) having a drive shaft (1). The sensor system (10) comprises an optical fibre (2) with a strain sensitive element (3). According to one aspect, a connection structure (4) is configured to hold at least a part of the optical fibre (2) with the strain sensitive element (3) at a radial distance (R2-R1) remote from the drive shaft (1) for amplifying the strain (S2) on the strain sensitive element (3) with respect to the strain (51) on the drive shaft (1). According to a further aspect, at least three respective lengths of one or more optical fibres follow parallel, e.g. helical, paths with respect to each other to distinguish different strain forces.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: January 28, 2020
    Assignee: Fugro Technology B.V.
    Inventors: Johannes Maria Singer, Devrez Mehmet Karabacak, Bill Heffernan
  • Patent number: 10545283
    Abstract: An optical fiber includes multiple optical cores configured in the fiber including a set of primary cores and an auxiliary core. An interferometric measurement system uses measurements from the multiple primary cores to predict a response from the auxiliary core. The predicted auxiliary core response is compared with the actual auxiliary core response to determine if they differ by more than a predetermined amount, in which case the measurements from the multiple primary cores may be deemed unreliable.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: January 28, 2020
    Assignee: Intuitive Surgical Operations, Inc.
    Inventors: Mark E. Froggatt, Dawn K. Gifford, Jeffrey T. Lacroix, Patrick Roye, Alexander K. Sang
  • Patent number: 10520381
    Abstract: A photonic pressure sensor device includes a cantilever pivotally attached to a fixed mount. The cantilever has an electromagnetic reactive material located thereon that is configured to cause a movement of the cantilever based on a photonic pressure exerted on the electromagnetic reactive material from an electromagnetic radiation source incident on the material. An etalon is coupled to the cantilever such that a position of the etalon changes based on the movement of the cantilever. A light source is optically coupled to the etalon to provide a light beam to the etalon. The change in the position of the etalon causes interference of the light within the etalon resulting in an interference light beam. A light detector is positioned to receive the interference light beam from the etalon and configured to measure an intensity value for the interference light beam.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: December 31, 2019
    Assignee: Micatu Inc.
    Inventors: Atul Pradhan, Scott Stelick
  • Patent number: 10520374
    Abstract: In some embodiments, phonon based temperature measuring apparatuses include a light source positioned to direct a light toward a prism-resonant cavity interface of an optical resonant cavity inducing an evanescent wave that is guided into the resonant cavity having surface phonon polariton properties; a detector positioned proximate the resonant cavity and configured to detect reflected light from the prism-resonant cavity interface; and a temperature calculator coupled with the detector and configured to determine evanescent light coupling to one or more phonon polariton modes from the resonant cavity, calculate a quality factor as a function of a frequency spectrum of at least one of the one or more phonon polariton modes, and determine a temperature of a dielectric material within the resonant cavity as a function of the quality factor.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: December 31, 2019
    Assignee: HOWARD UNIVERSITY
    Inventors: James S. Hammonds, Kimani A. Stancil
  • Patent number: 10520355
    Abstract: A fiber optic sensor, a process for utilizing a fiber optic sensor, and a process for fabricating a fiber optic sensor are described, where a double-side-polished silicon pillar is attached to an optical fiber tip and forms a Fabry-Pérot cavity. In an implementation, a fiber optic sensor in accordance with an exemplary embodiment includes an optical fiber configured to be coupled to a light source and a spectrometer; and a single silicon layer or multiple silicon layers disposed on an end face of the optical fiber, where each of the silicon layer(s) defines a Fabry-Pérot interferometer, and where the sensor head reflects light from the light source to the spectrometer. In some implementations, the fiber optic sensor may include the light source coupled to the optical fiber, a spectrometer coupled to the optical fiber, and a controller coupled to the high-speed spectrometer.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: December 31, 2019
    Assignees: NUTECH VENTURES, Inc., The United States of America, as represented by the Secretary of the Navy
    Inventors: Ming Han, Guigen Liu, Weilin Hou, Qiwen Sheng
  • Patent number: 10502681
    Abstract: The present disclosure provides an apparatus and a method for measuring a concentration of pollutants in water. A passive Q-switched fiber laser outputs an evanescent wave to a to-be-tested water sample after emitting a Q-switched pulse laser signal and transmitting it via an evanescent field fiber, and based on an evanescent wave change caused by an absorption effect of the pollutants in the to-be-tested water sample to the evanescent wave and an output repetition frequency change of the passive Q-switched fiber laser due to the evanescent wave change, outputs an output repetition frequency result of the passive Q-switched fiber laser. The method is simple; and the apparatus based on the method is simple in structure and low in cost.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: December 10, 2019
    Inventors: Peiguang Yan, Hao Chen, Fengfei Xing, Min Zhang
  • Patent number: 10481145
    Abstract: In one embodiment, a device for measuring blood coagulation includes a substrate having a surface, an optical waveguide provided on the surface of the substrate, the waveguide having a tip, and means for spatially separating objects from the tip of the waveguide.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: November 19, 2019
    Assignee: University of South Florida
    Inventor: Anna Pyayt
  • Patent number: 10481324
    Abstract: The present invention is directed to an optical fiber grating having a core, that is capable of controlling the light signal transmission therethrough by causing at least one of: at least one spectral peak, and/or at least one spectral dip in its core light transmission spectrum, corresponding to at least one predetermined wavelength. The inventive optical fiber diffraction grating comprises at least one longitudinally positioned structural element of a predetermined geometric profile and that is configured for diffracting a portion of the transmitted light signal at at least one predefined wavelength thereof, from at least one core mode into at least one of: at least one cladding mode and/or at least one radiating mode. Various embodiments of a number of novel techniques for fabrication of the inventive optical fiber diffraction grating are provided, inclusive of a novel technique for fabricating the inventive grating from a single material.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: November 19, 2019
    Assignee: Chiral Photonics, Inc.
    Inventors: Victor Churikov, Victor Il'ich Kopp
  • Patent number: 10473541
    Abstract: A device and system for detecting dynamic strain. The device comprises a longitudinally extending carrier and an optical fiber embedded along an outer surface of a length of the carrier. The optical fiber comprises at least one pair of fiber Bragg gratings (FBGs) tuned to reflect substantially identical wavelengths. The system comprises the device and an interrogator comprising a laser source and a photodetector. The interrogator is configured to perform interferometry by shining laser light along the optical fiber and detecting light reflected by the FBGs. The interrogator outputs dynamic strain measurements based on interferometry performed on the reflected light.
    Type: Grant
    Filed: July 4, 2014
    Date of Patent: November 12, 2019
    Assignee: Hifi Engineering Inc.
    Inventors: John Hull, Seyed Ehsan Jalilian
  • Patent number: 10465879
    Abstract: A dome light assembly that includes a light-producing element comprising a polymeric film between two glass substrates, a reflective surface facing an interior, and a plurality of edges; and a controller configured to direct LED sources to (a) excite photoluminescent structures within the element to transmit decorative light patterns, and (b) transmit functional light patterns, into the interior. Further, the sources are configured to direct incident light into the edges.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: November 5, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Stuart C. Salter, Paul Kenneth Dellock, Chester Stanislaus Walawender, Aaron Bradley Johnson
  • Patent number: 10458844
    Abstract: A spectrometer-equipped lighting device detects substances in an environment around the device. A fiber detector is optically coupled to receive light from a light source. The fiber detector has a bare area from which emanates an evanescent wave of light surrounding an exterior of the fiber detector to interact with the environment in which the fiber detector is exposed. The spectrometer, optically coupled to an opposite end of the fiber detector, detects the light output and in response, generates signals representative of the spectral power distribution of the light of the evanescent wave that has interacted with the surrounding environment. A controller analyzes the spectrometer generated signals and initiates action based on the analysis of the generated signals or outputs a report indicating an environmental condition detected by the spectrometer-equipped device.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: October 29, 2019
    Assignee: ABL IP HOLDING LLC
    Inventors: David P. Ramer, Jack C. Rains, Jr.
  • Patent number: 10457596
    Abstract: An optical sensor device includes an optical waveguide portion having a core, the core having a first refractive index, and a functional material layer coupled to the optical fiber portion, the functional material layer being made of a metal oxide material, the functional material layer being structured to have a second refractive index, the second refractive index being less than the first refractive index. The functional material layer may be a nanostructure material comprising the metal oxide material with a plurality of holes or voids formed therein such that the functional material layer is caused to have the second refractive index.
    Type: Grant
    Filed: January 17, 2018
    Date of Patent: October 29, 2019
    Assignee: University of Pittsburgh—Of the Commonwealth System of Higher Education
    Inventors: Peng Chen, Jacob Lorenzi Poole, Paul R. Ohodnicki, Michael Paul Buric
  • Patent number: 10429517
    Abstract: A radio-opaque plastic scintillator detector (PSD) for use in various medical applications and methods of making and using the PSD. The method requires coating a plastic scintillator fiber with a radio-opaque material; cutting the scintillator fiber; stripping the end of a plastic fiber optic fiber; cutting the naked end of a plastic fiber optic fiber; inserting a closely fitting guide tube over the naked end and inserting the cut scintillating fiber into the guide tube; coating the detector end of the cable with a light opaque polymer or jacket and adding a connector to the other end.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: October 1, 2019
    Assignee: AngioDynamics, Inc.
    Inventors: John Isham, Eric Hyman, Adam Hoch
  • Patent number: 10427154
    Abstract: Disclosed is a chip.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: October 1, 2019
    Assignee: GeneMind Biosciences Company Limited
    Inventors: Ping Wu, Qin Yan
  • Patent number: 10422951
    Abstract: Disclosed is a planar waveguide including: a core (11) which is a flat plate through which light propagates; a cladding (12) which is a flat plate for reflecting the light in a state of being joined to an upper surface of the core (11); and a cladding (13) which is a flat plate for reflecting the light in a state of being joined to a lower surface of the core (11), in which each of the claddings (12) and (13) is a multilayer film in which multiple films made from different materials are layered. As a result, a material having a low index of refraction can be used as the material of the core (11), and the limit on materials usable as the material of the core (11) is relaxed.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: September 24, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kenichi Hirosawa, Takayuki Yanagisawa
  • Patent number: 10409543
    Abstract: When a plurality of amplification devices each including a display unit are used in combination, deterioration in visibility of displayed information is prevented. An amplifier unit includes a connection mode specifying unit that detects another amplifier unit including another display unit which is disposed to form one display area along with the display unit and a display control unit that displays information in the display area formed by a plurality of display units.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: September 10, 2019
    Assignee: OMRON Corporation
    Inventors: Kazuki Tatehata, Takeshi Takakura
  • Patent number: 10409003
    Abstract: A planar lightwave circuit may include a set of components. The set of components may include an input waveguide to couple to an optical communications transceiver. The set of components may include an output waveguide to couple to the optical communications transceiver. The set of components may include a common port to couple to an optical fiber. The set of components may include a first polarization beam splitter. The set of components may include a second polarization beam splitter. The set of components may include a third polarization beam splitter. The set of components may include a rotator assembly including a Faraday rotator and a quarter-wave plate.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: September 10, 2019
    Assignee: Lumentum Operations LLC
    Inventors: Michael Ayliffe, Zhaoming Li
  • Patent number: 10392882
    Abstract: A technique facilitates monitoring of flow conditions with respect to flow through a tubing. A distributed sensor is routed along an interior of the tubing to monitor flow conditions. For example, the distributed sensor may be routed over a length of the tubing having a lateral opening. Fluid is flowed along the distributed sensor and within the interior of the tubing. The distributed sensor is operated to measure strain which results from flow of the fluid along the distributed sensor. The strain may then be evaluated to determine a change in a flow condition, such as a change in a flow condition related to the lateral opening.
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: August 27, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Paul Dickenson, Gareth Lees, Colin Allan Wilson, Surya Perdana Simanjuntak
  • Patent number: 10371641
    Abstract: An apparatus, includes an illuminating light source and illuminating optics arranged to illuminate a sample region with illuminating light pulses, light gathering optics to gather Raman scattered light pulses from the sample region, a spectral disperser and a detector array for measuring the spectral intensity distribution of Raman scattered light pulses obtained from the sample region and an auxiliary detector for providing an indicator signal indicative of elastic scattering coefficient of the sample region. The apparatus is arranged to form a first output spectrum from the spectral intensity distribution of a first group of Raman scattered light pulses. The pulses of the first group of Raman scattered light pulses are obtained from the sample region when the indicator signal indicates that an object is located in the sample region.
    Type: Grant
    Filed: January 20, 2017
    Date of Patent: August 6, 2019
    Assignee: TimeGate Instruments Oy
    Inventors: Juha Kostamovaara, Ilkka Nissinen, Jan Nissinen, Rami Aikio, Jussi Tenhunen, Lauri Kurki
  • Patent number: 10371559
    Abstract: Systems and methods that use a differential spectral liquid level sensor to measure the level of liquid in a reservoir (e.g., a fuel tank or other storage container). The use of a differential spectral liquid level sensor solves the problem of common-mode intensity variations (i.e., intensity variations not due to the level of the liquid) by having two different wavelengths propagate through the same optical path but have different spectral attenuations in the liquid. By determining the ratio of the received optical powers, common-mode intensity variations can be neutralized, thereby enhancing the accuracy of the received power reading and the resulting liquid level indication.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: August 6, 2019
    Assignee: The Boeing Company
    Inventors: Tuong K. Truong, Eric Y. Chan, Dennis G. Koshinz, Kim Quan Anh Nguyen, Eric J. Harvey
  • Patent number: 10345518
    Abstract: A photonic waveguide for conducting light having first and second wavelengths, the waveguide comprising superposed first and second strips of light conducting semiconductor materials having first and second refractive indexes, wherein the second wavelength is shorter than the first wavelength and the second refractive index is higher than the first refractive index, wherein the width and height of the first strip of light conducting semiconductor material are such that the first strip of light conducting semiconductor material is adapted to confine an optical mode of the first wavelength and the width and height of the second strip of light conducting semiconductor material are such that the second strip of light conducting semiconductor material is adapted to confine an optical mode of the second wavelength but is too narrow to confine an optical mode of the first wavelength.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: July 9, 2019
    Assignee: HRL Laboratories, LLC
    Inventors: Daniel Yap, Troy Rockwood, Kevin Geary, Sarabjit Mehta
  • Patent number: 10345227
    Abstract: A sensor system having coupling structures is disclosed. The system includes an input coupling structure, an interaction region, and an output coupling structure. The input coupling structure is configured to receive emitted light at a selected coupling efficiency and may provide filtering of the emitted light for a selected wavelength. The interaction region is coupled to the input coupling structure and configured to interact the light from the input coupling structure with a specimen. The output coupling structure is coupled to the interaction region and configured to provide interacted light from the interaction region to the detector.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: July 9, 2019
    Assignee: Infineon Technologies AG
    Inventors: Ventsislav Lavchiev, Thomas Grille, Ursula Hedenig, Bernhard Jakoby
  • Patent number: 10302467
    Abstract: A method of optical sensing is disclosed. The method comprises coupling an excitation optical signal into a first optical fiber to induce Rayleigh backscattering, thereby providing a backscattered signal; coupling the backscattered signal into a second optical fiber, spatially separated from the first optical fiber; and optically amplifying the backscattered signal in the second optical fiber, thereby generating a sensing signal.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: May 28, 2019
    Assignee: Ariel Scientific Innovations Ltd.
    Inventors: Shmuel Sternklar, David Mermelstein
  • Patent number: 10287398
    Abstract: A functionalized siloxane includes a ligand capable of coordinating a metal. The functionalized siloxane includes a pyridine-containing ligand attached to a siloxane polymer. The functionalized siloxanes can be employed to provide complexes including a metal that may impart a desired property to the polymer. In one embodiment, the polymer can complex lanthanide metals that are capable of phosphorescing upon exposure to UV irradiation. Such polymers can be employed to provide functional materials such as, for example, luminescent films, coatings, etc.
    Type: Grant
    Filed: December 29, 2015
    Date of Patent: May 14, 2019
    Assignee: Momentive Performance Materials Inc.
    Inventors: Karthikeyan Sivasubramanian, Vivek Khare
  • Patent number: 10274673
    Abstract: We provide methods and apparatus for preparing crystalline-clad and crystalline core optical fibers with minimal or no breakage by minimizing the influence of thermal stress during a liquid phase epitaxy (LPE) process as well as the fiber with precisely controlled number of modes propagated in the crystalline cladding and crystalline core fiber via precisely controlling the diameter of crystalline fiber core with under-saturated LPE flux. The resulting crystalline cladding and crystalline core optical fibers are also reported.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: April 30, 2019
    Assignees: The Penn State Research Foundation, General Opto Solutions LLC
    Inventors: Shizhuo Yin, Fang Luo
  • Patent number: 10263696
    Abstract: An optical fiber is monitored for changes in a monitor signal caused when the fiber is subjected to vibration, motion, or handling typical of an intrusion attempt and for triggering an alarm condition in response by one or more sensors. The sensor emits data on each disturbance event including the existence of the disturbance event and a value associated with the disturbance event dependent on an intensity of the disturbance. The arrangement herein provides an algorithm to analyze the disturbance events which calculates for each event a score dependent on the presence of the event and the value associated with the event, generates a summation of the scores in a FIFO and when the summation of the scores exceeds a predetermined threshold within a predetermined time period, the processor emits a signal triggering the alarm condition.
    Type: Grant
    Filed: June 11, 2018
    Date of Patent: April 16, 2019
    Assignee: Network Integrity Systems, inc.
    Inventors: Cary R. Murphy, Daniel M Goertzen, Mark K. Bridges
  • Patent number: 10254626
    Abstract: An embodiment simultaneously receives light waves emanating from an object and having first frequency components f1.1 and f1.2, and pumped monochromatic coherent light waves having a second frequency f2. The method non-linearly combines the light waves having the first frequency component f1.1 and the pumped monochromatic coherent light waves, and generates coherent light waves having a third frequency component f3.1 that is a sum of the first frequency f1.1 and the second frequency f2. The method non-linearly combines the light waves having the first frequency component f1.2 and the pumped monochromatic coherent light waves, and generates coherent light waves having a third frequency component f3.2 that is a sum of the first frequency f1.2 and the second frequency f2. The method digitizes the generated coherent light waves and outputs an image responsive to the light waves emanating from the object.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: April 9, 2019
    Inventors: Gleb M. Akselrod, David R. Smith
  • Patent number: 10246795
    Abstract: The present invention relates to a transfer-free method for forming a graphene layer, in which a high-quality graphene layer having excellent crystallinity can be easily formed over a large area at low temperature by a transfer-free process so that it can be applied directly to a base substrate, which is used in a transparent electrode, a semiconductor device or the like, without requiring a separate transfer process, and to an electrical device comprising a graphene layer formed by the method. More specifically, the transfer-free method for forming a graphene layer comprises the steps of: depositing a Ti layer having a thickness of 3-20 m on a base substrate by sputtering; and growing graphene on the deposited Ti layer by chemical vapor deposition.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: April 2, 2019
    Assignee: Kuk-II Graphene Co., Ltd.
    Inventors: Soon-Gil Yoon, Byeong-Ju Park
  • Patent number: 10241289
    Abstract: Anchoring an input cable (190) at an input port (123, 223) of an enclosure (110) includes inserting the input cable (190) through an anchor member (151, 251) so that a cable jacket (191) terminates within the anchor member (151, 251) and at least one optical fiber (195) extends outwardly from the anchor member (151, 251). The anchor member (151, 251) is secured to the cable jacket (191) using the sheath (175). A cover (162, 260) is mounted to the anchor member (151, 251) to form a pass-through assembly (150, 250) defining an enclosed region. Material is injected into the enclosed region to fix strength members (197) and/or optical fibers (195) of the input cable (190) to the pass-through assembly (150, 250). The ruggedized pass-through assembly (150, 250) is disposed at a base (120, 220) of the enclosure (110).
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: March 26, 2019
    Assignee: CommScope Connectivity Belgium BVBA
    Inventors: Bart Mattie Claessens, Philippe Coenegracht
  • Patent number: 10238370
    Abstract: A biopsy needle has a central axis and includes one or more sensing regions, each sensing region formed by a plurality of sensing optical fibers located over a particular extent of said central axis and inside the outer shell of the needle. The sensing optical fibers are coupled to a wavelength interrogator. A steerable catheter has a central axis and outer shell, the outer shell coupled to a plurality of optical fibers in sensing regions and actuation regions, the sensing regions formed over particular extents of the central axis by bonding gratings to the inner surface of the outer shell, and the actuation regions formed by coupling optical energy into shape memory alloys bonded to the outer shell.
    Type: Grant
    Filed: January 3, 2014
    Date of Patent: March 26, 2019
    Assignee: INTELLIGENT FIBER OPTIC SYSTEMS, INC.
    Inventors: Yong-Lae Park, Richard James Black, Behzad Moslehi, Mark R. Cutkosky, Santhi Elayaperumal, Bruce Daniel, Alan Yeung, Vahid Sotoudeh
  • Patent number: 10234743
    Abstract: A beam steering device is provided including a p-n junction layer disposed on a reflective electrode layer, wherein a refractive index of the p-n junction layer is variable according to a voltage applied to the reflective electrode layer; a nanoantenna layer including a plurality of components disposed on the p-n junction layer; and a common electrode electrically connected to each of the plurality of components of the nanoantenna. The p-n junction layer may include a p-doped layer and an n-doped layer.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: March 19, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sunil Kim, Jaechul Park, Duhyun Lee, Byounglyong Choi
  • Patent number: 10194801
    Abstract: A method for visualizing branches of a lumen includes inserting (402) a fiber optic shape sensing device into a lumen and determining (404) changes in the lumen based upon strain induced in the fiber optic shape sensing device by flow in the lumen. Locations of branches are indicated (410) on a rendering of the lumen. An instrument is guided (414) to the locations of branches indicated on the rendering.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: February 5, 2019
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Haytham Elhawary, Aleksandra Popovic, Robert Manzke, Raymond Chan
  • Patent number: 10178945
    Abstract: A shape sensor comprises a shape sensor main body which comprises an optical fiber capable, a detection object section, and a light detecting section to detect the detection light and which is capable of measuring a shape of a measurement target object by utilizing a change in characteristics of the light detected through the detection object section in accordance with a change in curvature of the optical fiber when the optical fiber curves; and a curving direction regulating section which is provided on at least a part of the optical fiber along an optical axis thereof and regulates a curvable direction of the optical fiber to a desired direction; wherein the curving direction regulating section is a core member which is disposed in at least a part of the shape sensor main body along the light propagating direction of the optical fiber and whose main curving direction is regulated.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: January 15, 2019
    Assignee: OLYMPUS CORPORATION
    Inventors: Toru Kuboi, Satoshi Ohara
  • Patent number: 10168471
    Abstract: An optical sensor has a waveguide having a core, a cladding having an outer surface and a long period fiber grating. The core, the cladding and the long period fiber grating collectively provide at least two resonant wavelengths. The optical sensor also has binding sites on the outer surface of the cladding for binding to elements to be detected to the outer surface of the cladding. The cladding may be thinned down to a thickness sufficiently low produce the resonant wavelengths. The binding sites include agents for binding to the elements to be detected with the agents being covalently bonded to the surface of the cladding. Example binding sites can include bacteriophages for detecting E. coli bacteria, Palladium for detecting hydrogen, or synthetic DNA for detecting viruses of certain molecules for example.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: January 1, 2019
    Inventors: Wojtek J. Bock, Saurabh Mani Tripathi, Predrag Mikulic