Grating Patents (Class 372/102)
  • Patent number: 11323105
    Abstract: A system, method, and apparatus for continuous seed laser pulses supplied to a CW pumped pre-amplifier and/or power-amplifier chain comprises an optical modulator configured to impress pulse signals on an optical signal, a waveform generator configured to establish a structure of the optical signal, and a keep-alive circuit that generates a continuous electrical pulse pattern provided to the optical modulator, wherein the system provides a continuous seed laser pulse structure.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: May 3, 2022
    Assignee: FERMI RESEARCH ALLIANCE, LLC
    Inventors: David Johnson, Todd Johnson
  • Patent number: 11294266
    Abstract: The invention provides a wavelength conversion device and a projection device including the same. The wavelength conversion device includes a substrate, a reflective layer, and a wavelength conversion layer. The reflective layer has different thicknesses in a radial direction of the substrate. The invention further provides another wavelength conversion device and another projection device including the same. In the wavelength conversion device, the reflective layer includes a first colloid and reflective particles distributed in the first colloid. The reflective layer includes an inner reflective layer, a central reflective layer and an outer reflective layer. The concentration of the reflective particles in the central reflective layer is different from the concentration of the reflective particles in the inner reflective layer and the concentration of the reflective particles in the outer reflective layer.
    Type: Grant
    Filed: April 10, 2020
    Date of Patent: April 5, 2022
    Assignee: Coretronic Corporation
    Inventors: Pi-Tsung Hsu, Chi-Tang Hsieh
  • Patent number: 11251584
    Abstract: A tunable wavelength laser comprising a laser cavity formed by a broadband mirror and a comb mirror. The laser cavity comprising a gain region. The laser cavity is configured such that a non-integer number of cavity modes of the laser cavity are between two consecutive reflection peaks of the comb mirror.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: February 15, 2022
    Assignee: Freedom Photonics LLC
    Inventor: Gordon Barbour Morrison
  • Patent number: 11245246
    Abstract: A semiconductor laser diode includes a semiconductor body having an emitter region; and a first connection element that electrically contacts the semiconductor body in the emitter region, wherein the semiconductor body is in contact with the first connection element in the emitter region, and at least in places in the emitter region, the semiconductor body has a structuring that enlarges a contact area between the semiconductor body and the first connection element.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: February 8, 2022
    Assignee: OSRAM OLED GmbH
    Inventor: Wolfgang Reill
  • Patent number: 11215754
    Abstract: An optical waveguide element includes an optical waveguide which is formed on one surface of a substrate, an incidence part for light to be incident on the optical waveguide or an emission part for emitting light from the optical waveguide which is disposed in an end portion of the substrate, and a dielectric film which is formed on the optical waveguide of at least one of the incidence part and the emission part, and the vicinity thereof. Regarding the dielectric film, dielectric films including a dielectric film formed of a first material having an index of refraction higher than an index of refraction of the substrate and a dielectric film formed of a second material having an index of refraction lower than the index of refraction of the substrate are alternately laminated.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: January 4, 2022
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Yuji Yamane, Norikazu Miyazaki, Yu Kataoka, Hideki Ichimei
  • Patent number: 11204467
    Abstract: A grating coupler having first and second ends for coupling a light beam to a waveguide of a chip includes a substrate configured to receive the light beam from the first end and transmit the light beam through the second end, the substrate having a first refractive index n1, a grating structure having curved grating lines arranged on the substrate, the grating structure having a second refractive index n1, wherein the curved grating lines have line width w and height d and are arranged by a pitch ?, wherein the second refractive index n2 is less than first refractive index n1, and a cladding layer configured to cover the grating structure, wherein the cladding layer has a third refractive index n3.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: December 21, 2021
    Assignees: Mitsubishi Electric Research Laboratories, Inc., Mitsubishi Electric Corporation
    Inventors: Keisuke Kojima, Mitsunobu Gotoda, Toshiaki Koike-Akino, Mohammad Tahersima
  • Patent number: 11177629
    Abstract: A light source device according to an embodiment is used with a light guide member and a wavelength converting member, and includes a light-emitting element, a light sensor, and a driving unit. The light-emitting element radiates a light beam to be incident on a first end of the light guide member by being supplied with a drive current. The light sensor detects signal light, which has been incident on a second end of the light guide member and transmitted to the first end. The driving unit supplies the drive current to the light-emitting element and controls the drive current based on a result of detection of the signal light.
    Type: Grant
    Filed: May 5, 2020
    Date of Patent: November 16, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Hirofumi Konishi, Shigeaki Yamasaki, Erika Kawabata, Yoshiharu Nagatani, Hiroshi Kitano
  • Patent number: 11156789
    Abstract: An example system includes a grating coupled laser, a laser optical interposer (LOI), an optical isolator, and a light redirector. The grating coupled laser includes a laser cavity and a transmit grating optically coupled to the laser cavity. The transmit grating is configured to diffract light emitted by the laser cavity out of the grating coupled laser. The LOI includes an LOI waveguide with an input end and an output end. The optical isolator is positioned between the surface coupled edge emitting laser and the LOI. The light redirector is positioned to redirect the light, after the light passes through the optical isolator, into the LOI waveguide of the LOI.
    Type: Grant
    Filed: May 26, 2020
    Date of Patent: October 26, 2021
    Assignee: II-VI DELAWARE, INC.
    Inventors: Daniel Mahgerefteh, Jin-Hyoung Lee, Shiyun Lin
  • Patent number: 11092746
    Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for tuning photonic device performance. In one aspect, a method includes receiving an initial photonic device configuration including multiple coupling structures and multiple photonic components. A first amount of light coupling between a first photonic component and a second photonic component of the multiple photonic components is received, which depends upon a subset of the coupling structures that are located between the first photonic component and the second photonic component. One or more coupling structures of the subset of coupling structures located between the first photonic component and the second photonic component are determined to be removed to cause the light coupling between the first photonic component and the second photonic component to change from the first amount of coupling to a target amount of coupling.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: August 17, 2021
    Assignee: X Development LLC
    Inventors: Brian John Adolf, Martin Friedrich Schubert
  • Patent number: 11070739
    Abstract: An endoscope system of the present invention includes: a first illumination unit that emits first illumination light for imaging two sets of image information about a subject at different depths; a second illumination unit that emits second illumination light having a wide band covering a visible band from a position different from the position of the first illumination light; an imaging unit that images a first illumination image and a second illumination image of the subject that is illuminated with the first illumination light and the second illumination light; a separation processing unit that separates the two sets of image information from the first illumination image; and a separated-image generating unit that generates two separated images by processing the second illumination image using the two sets of image information.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: July 20, 2021
    Assignee: OLYMPUS CORPORATION
    Inventors: Koji Matsumoto, Sho Shinji, Kenji Urushibata, Hiroyuki Kubo, Tetsuhiro Oka
  • Patent number: 11061170
    Abstract: Disclosed is a broadband objective lens and a method of manufacturing the objective lens. The objective lens includes a plurality of lenses, and each of the lenses includes a coating layer on which a nanopattern is formed.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: July 13, 2021
    Assignee: Korea Basic Science Institute
    Inventors: Ki Soo Chang, Kye Sung Lee, Dong Uk Kim, Jung Dae Kim
  • Patent number: 11025026
    Abstract: A laser system including: A. a laser apparatus configured to output a pulse laser beam; B. an optical pulse stretcher including a delay optical path for expanding a pulse width of the pulse laser beam; and C. a phase optical element included in the delay optical path and having a function of spatially and randomly shifting a phase of the pulse laser beam. The phase optical element includes a plurality of types of cells providing different amounts of phase shift to the pulse laser beam and arranged irregularly in any direction.
    Type: Grant
    Filed: June 3, 2019
    Date of Patent: June 1, 2021
    Assignee: Gigaphoton Inc.
    Inventor: Takashi Onose
  • Patent number: 11022267
    Abstract: A vehicle lamp (1) includes a light source (30) that emits pieces of laser light (LR, LG, LB) having different wavelengths in a time division manner, and a plurality of diffraction gratings (43R, 43G, 43B) corresponding to the pieces of laser light (LR, LG, LB) of the wavelengths, respectively. The laser light (LR, LG, LB) of the wavelengths emitted from the light source (30) are incident on the diffraction gratings (43R, 43G, 43B) corresponding to the laser light (LR, LG, LB), and regions irradiated with light (DLR, DLG, DLB) emitted from the diffraction grating (43R, 43G, 43B) overlap with each other.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: June 1, 2021
    Assignee: KOITO MANUFACTURING CO., LTD.
    Inventors: Naoki Uchida, Honami Fujii, Masanori Kito
  • Patent number: 11015981
    Abstract: The invention relates to a method for the two-dimensional reconstruction of wave fronts (104) of light for use in an optical system (100) comprising: measuring the distribution function of the light intensity in at least two images at different optical planes (101, 102) having an optical path difference. In particular this method is suitable for probing the tomographical distribution of wave fronts of electromagnetic fields with an image detector, e.g. any standard two-dimensional camera.
    Type: Grant
    Filed: February 1, 2018
    Date of Patent: May 25, 2021
    Assignee: Wooptix S.L.
    Inventors: Juan José Fernández Valdivia, Juan Manuel Trujillo Sevilla, Óscar Gómez Cárdenes
  • Patent number: 11002594
    Abstract: Forming a light pulse having a plurality of time-dependent frequency components such as a chirped light pulse or a light pulse group and superposing reflected light from different portions of an optical fiber allows detection of changes in effective optical path differences due to physical parameters in the environment of the optical fiber by sensing the optical interference pattern of each light frequency and wavelength. The development of a plurality of interference patterns from each light pulse provides sufficient information for robust demodulation by known methods to produce signals having good fidelity to variations in the physical parameters of interest, particularly vibrations and acoustic waves. The location of the measured physical parameter along the optical fiber can be determined from the time difference between injecting the light pulse and detection of a reflection or Rayleigh backscattering and diffraction index of the optical fiber.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: May 11, 2021
    Assignee: Sentek Instrument, LLC
    Inventors: Lingmei Ma, Bo Dong, Anbo Wang
  • Patent number: 10965087
    Abstract: Provided is a laser device that includes a laser chamber in which a pair of discharge electrodes are disposed; a line narrowing optical system including a grating disposed in a position outside the laser chamber; a beam expander optical system that increases a diameter of a light beam, outputted from the laser chamber and traveling toward the grating, in a first direction parallel to a discharge direction between the discharge electrodes and in a second direction orthogonal to the discharge direction; and a holding platform that is formed as a component separate from the laser chamber and the grating, holds the beam expander optical system, and forms along with the beam expander optical system a beam expander unit.
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: March 30, 2021
    Assignee: Gigaphoton Inc.
    Inventors: Hirotaka Miyamoto, Osamu Wakabayashi
  • Patent number: 10962717
    Abstract: A grating coupler having first and second ends for coupling a light beam to a waveguide of a chip includes a substrate configured to receive the light beam from the first end and transmit the light beam through the second end, the substrate having a first refractive index n1, a grating structure having curved grating lines arranged on the substrate, the grating structure having a second refractive index n1, wherein the curved grating lines have line width w and height d and are arranged by a pitch ?, wherein the second refractive index n2 is less than first refractive index n1, and a cladding layer configured to cover the grating structure, wherein the cladding layer has a third refractive index n3.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: March 30, 2021
    Assignees: Mitsubishi Electric Research Laboratories, Inc., Mitsubishi Electric Corporation
    Inventors: Keisuke Kojima, Mitsunobu Gotoda, Toshiaki Koike-Akino, Muhammad Tahersima
  • Patent number: 10958038
    Abstract: An edge-emitting laser includes an active gain section and a reflector section optically coupled to the active gain section. The active gain section is configured to amplify an optical power of light across a wavelength range. The reflector section is configured to selectively reflect light of a selected wavelength within the wavelength range. The selected wavelength is tunable via high-frequency index modulation of the reflector section. The active gain section and the reflector section collectively form an optical cavity configured to lase coherent light in the selected wavelength.
    Type: Grant
    Filed: May 20, 2019
    Date of Patent: March 23, 2021
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Shiva Shahin, Dale Eugene Zimmerman
  • Patent number: 10955726
    Abstract: Microwave-to-optical transducers in an optical ring resonator having intracavity grating to split a single resonance order are provided. In one aspect, a microwave-to-optical transducer includes: an optical ring resonator with intracavity grating; and a microwave signal waveguide optically coupled to the optical ring resonator with the intracavity grating. Microwave-to-optical transducers having multiple pump photon optical ring resonators and multiple signal photon optical ring resonators optically coupled to the optical ring resonator with the intracavity grating are also provided, as is a method of forming a microwave-to-optical transducer, and a method for microwave-optical transduction.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: March 23, 2021
    Assignee: International Business Machines Corporation
    Inventor: Jason S. Orcutt
  • Patent number: 10958036
    Abstract: A semiconductor light-emitting device includes an active layer including quantum dots, a diffraction grating, a low-reflectance film disposed at a light-emitting end of the active layer, and a high-reflectance film disposed at another end of the active layer and having an optical reflectance higher than an optical reflectance of the low-reflectance film.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: March 23, 2021
    Assignees: FUJITSU LIMITED, PHOTONICS ELECTRONICS TECHNOLOGY RESEARCH ASSOCIATION
    Inventor: Nobuaki Hatori
  • Patent number: 10935417
    Abstract: A distributed acoustic sensing (DAS) system has a coherent light source device that repeatedly sends a coherent interrogating light pattern (CILP) into an optical sensing fiber during a measurement duration that is equal to or greater than a down-up travel time of the optical sensing fiber. The CILP is one of a plurality of patterns composed of coherent carrier light. A detection device detects backscattered light in the optical sensing fiber in response to the CILP and generates a signal indicative of the detected backscattered light. An evaluation device analyses the signal. Each CILP has similar physical properties that render the light patterns indistinguishable by comparing physical properties of the backscattered light responsive to at least two successive interrogating light patterns as detected. The coherent light source device can change the time between successively sent interrogating light patterns after the passing of at least one measurement time duration.
    Type: Grant
    Filed: October 22, 2018
    Date of Patent: March 2, 2021
    Assignee: AiQ Dienstleistungen UG (haftungsbeschränkt)
    Inventor: Gregor Cedilnik
  • Patent number: 10928332
    Abstract: The invention relates to an inspection device for masks for semiconductor lithography, comprising an imaging device for imaging a mask, and an image recording device, wherein one or more correction bodies which exhibit a dispersive behavior for at least one subrange of the illumination radiation used for the imaging are arranged in the light path between the mask and the image recording device. The invention furthermore relates to a method for taking account of longitudinal chromatic aberrations in inspection devices for masks, comprising the following steps: recording a specific number of images having differently defocused positions, and selecting a subset of the images and simulating a longitudinal chromatic aberration of a projection exposure apparatus.
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: February 23, 2021
    Assignee: Carl Zeiss SMT GmbH
    Inventors: Holger Seitz, Thomas Zeuner, Heiko Feldmann
  • Patent number: 10923877
    Abstract: Embodiments of the present disclosure relate to a surface-mount laser apparatus. One example apparatus includes an on-chip laser, a passive waveguide, and a waveguide detector. The waveguide detector includes a first ridge waveguide. The on-chip laser includes a second ridge waveguide. The on-chip laser is coupled with the passive waveguide by the second ridge waveguide, and the waveguide detector is coupled with the passive waveguide by the first ridge waveguide.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: February 16, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Kaisheng Chen, Hongmin Chen
  • Patent number: 10895684
    Abstract: A method, and apparatus provided thereby, includes providing a substrate and placing an integrated laser on the substrate. A first cladding layer surrounds the integrated laser and includes a laser optical coupler aligned with an output of the laser. The laser optical coupler includes silicon and the laser includes a III-V compound semiconductor. The output of the laser is spaced apart from the laser optical coupler by a gap of less than or equal to 500 nanometers. An optical waveguide is positioned on the first cladding layer and in optical communication with the laser optical coupler.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: January 19, 2021
    Assignee: Seagate Technology LLC
    Inventors: Mark A. Gubbins, Richard C. A. Pitwon, Aidan D. Goggin, Marcus B. Mooney, Reyad Mehfuz, Fadi El Hallak, Paula F. McElhinney, Brendan Lafferty, Kelly E. Callan
  • Patent number: 10883874
    Abstract: Provided are a dual coupler device configured to receive lights of different polarization components, a spectrometer including the dual coupler device, and a non-invasive biometric sensor including the spectrometer. The dual coupler device may include, for example, a first coupler layer configured to receive a light of a first polarization component among incident lights. and a second coupler layer configured to receive a light of a second polarization component among the incident lights, wherein a polarization direction of the light of the first polarization component is perpendicular to a polarization direction of the light of the second polarization component. The first coupler layer and the second coupler layer may be spaced apart from each other and extended along a direction in which the light propagates in the first coupler layer and the second coupler layer.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: January 5, 2021
    Assignees: SAMSUNG ELECTRONICS CO., LTD., IMEC VZW
    Inventors: Seongho Cho, Tom Claes, Dongho Kim
  • Patent number: 10855376
    Abstract: The present invention reduces the level of optical reflections created in a photonic integrated circuit (PIC) going back into an integrated laser through Reflection Engineering; optimizing the phase/timing and position of optical reflections inherent to a PIC design while adding engineered reflections to the PIC to allow inherent reflections to be reduced or eliminated. The Wavelength Division Multiplexed (WDM) geometric optical isolator of the present invention combines an array of closely spaced WDM lasers with an array of modulators in a novel geometry in order to provide effective optical isolation of the lasers.
    Type: Grant
    Filed: January 30, 2020
    Date of Patent: December 1, 2020
    Assignee: Morton Photonics
    Inventors: Paul A. Morton, Jacob Khurgin
  • Patent number: 10830956
    Abstract: An optical fiber array includes a support, a single-mode optical fiber and a plurality of multimode optical fibers, the single-mode optical fiber and the multimode optical fibers being arranged on the support, and a polarizing plate provided on an end face of the support, wherein the single-mode optical fiber has polarization maintaining characteristics, an end face of the single-mode optical fiber and end faces of the multimode optical fibers face the end face of the support, and the polarizing plate covers the end faces of the multimode optical fibers.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: November 10, 2020
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Kosuke Fujii
  • Patent number: 10823955
    Abstract: An optical device includes a laser light source configured to emit a collimated beam of light, and a scanning mirror, which is configured to reflect and scan the beam of light over a predefined angular range. The optical device further includes a volume holographic grating (VHG), which is positioned to receive and reflect the collimated beam emitted by the laser light source toward the scanning mirror by Bragg reflection at a predefined Bragg-angle, while transmitting the beam reflected from the scanning mirror over a part of the angular range that is outside a cone containing the Bragg-angle.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: November 3, 2020
    Assignee: APPLE INC.
    Inventors: Andrew J. Sutton, Alexander Shpunt, Yuval Gerson
  • Patent number: 10746532
    Abstract: An interferometric distance measurement device includes a multiple wavelength light source, supplying a light beam having at least three different wavelengths. An interferometer unit is provided, which splits the light beam into a measuring light beam and a reference light beam. The measuring and reference light beams reflected back by measuring and reference reflectors are superimposed in an interfering manner to form an interference light beam. The interference light beam is split via a detection unit such that, in each instance, a plurality of phase-shifted, partial interference signals result per wavelength. With the aid of a signal processing unit, an absolute position information item regarding the measuring reflector is determined from the partial interference signals of different wavelengths.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: August 18, 2020
    Assignee: DR. JOHANNES HEIDENHAIN GMBH
    Inventors: Markus Meissner, Wolfgang Holzapfel
  • Patent number: 10738997
    Abstract: Sensing of gas species characteristics within a process chamber includes selectively projecting a beam of a first select lasing frequency therethough. The beam is optically coupled to a detector to detect a process transmission spectrum having an absorption dip at a select lasing frequency caused by a gas species characteristic. The beam is selectively projected through a fiber Bragg grating which is formed in an optical fiber core to partially reflect at least a portion of the beam of the first select lasing frequency while passing a remainder of the beam. The remainder of the beam has an FBG transmission spectrum mimicking the absorption dip at or near the select lasing frequency caused by a gas species characteristic of interest. It is optically coupled the detector. Outputs of the detector are monitored to compare the FBG transmission spectrum to any process transmission spectrum produced in the process chamber.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: August 11, 2020
    Assignee: ONPOINT TECHNOLOGIES, LLC
    Inventors: Dave Giltner, Andrew D. Sappey
  • Patent number: 10725212
    Abstract: A lens includes a curved surface. A plurality of taper shape structures is formed on the curved surface, and each taper shape structure has at least three substantial flat surfaces. P is less than or equal to 500 nm. H is less than or equal to 500 nm. The P refers to the pitch between two adjacent taper shape structures. The H refers to maximum vertical distance between each taper shape structure and the curved surface.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: July 28, 2020
    Assignee: Young Optics Inc.
    Inventors: Shih-Chang Liu, Chih-Chun Huang, Kai-Wei Hu
  • Patent number: 10725131
    Abstract: A topologically-protected traveling-wave amplifier includes resonators arranged in a two-dimensional array defining a periphery including a first edge. An output line is coupled to an output resonator disposed along the first edge spaced from an input resonator coupled to an output line. A synthetic gauge field generator associated with the resonators provides a topologically-protected edge state corresponding to propagation along the periphery in a propagation direction from the input resonator along the first edge to the output resonator. A parametric driving element creates pairs of photons in the edge state and amplifies a signal propagating along the first edge in the propagation direction. A signal incident from the input line propagates in the propagation direction along the first edge while being amplified and is detected at the output line as an amplified signal. A signal incident from the output line is attenuated before emerging at the input resonator.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: July 28, 2020
    Assignees: THE ROYAL INSTITUTION FOR THE ADVANCEMENT OF LEARNING/MCGILL UNIVERSITY, FRIEDRICH-ALEXANDER-UNIVERSITAT ERLANGEN-NURNBERG
    Inventors: Aashish Clerk, Martin Houde, Florian Marquardt, Vittorio Peano Cavasola
  • Patent number: 10727947
    Abstract: The present invention reduces the level of optical reflections created in a photonic integrated circuit (PIC) going back into an integrated laser through Reflection Engineering; optimizing the phase/timing and position of optical reflections inherent to a PIC design while adding engineered reflections to the PIC to allow inherent reflections to be reduced or eliminated. The Wavelength Division Multiplexed (WDM) geometric optical isolator of the present invention combines an array of closely spaced WDM lasers with an array of modulators in a novel geometry in order to provide effective optical isolation of the lasers.
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: July 28, 2020
    Assignee: Morton Photonics
    Inventors: Paul A. Morton, Jacob Khurgin
  • Patent number: 10714896
    Abstract: A multi-wavelength light source has a laser region that includes a gain medium with a reflective end facet and two or more diffraction gratings optically connected to a second end facet opposite to the reflective end facet of the gain medium, an optical amplifier configured to amplify a laser beam emitted from the reflecting end facet of the laser region and containing multiple wavelengths, the multiple wavelengths being amplified collectively, an optical demultiplexer configured to demultiplex an amplified laser beam output from the optical amplifier, and output waveguides connected to the optical demultiplexer and configured to output light beams with the multiple wavelengths.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: July 14, 2020
    Assignee: FUJITSU OPTICAL COMPONENTS LIMITED
    Inventor: Koji Otsubo
  • Patent number: 10714897
    Abstract: A distributed feedback semiconductor laser of includes a semiconductor stacked body and a first electrode. The semiconductor stacked body includes a first layer, an active layer that is provided on the first layer and is configured to emit laser light by an intersubband optical transition, and a second layer that is provided on the active layer. The semiconductor stacked body has a first surface including a flat portion and a trench portion; the flat portion includes a front surface of the second layer; the trench portion reaches the first layer from the front surface; the flat portion includes a first region and a second region; the first region extends along a first straight line; the second region extends to be orthogonal to the first straight line; and the trench portion and the second region outside the first region form a diffraction grating having a prescribed pitch along the first straight line. The first electrode is provided in the first region.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: July 14, 2020
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shinji Saito, Tsutomu Kakuno, Osamu Yamane, Akira Tsumura
  • Patent number: 10690752
    Abstract: A waveguide comprises a first surface and a second surface. The first surface comprises a first plurality of grating structures. The first surface other than the first plurality of grating structures comprises a first reflective layer. The second surface comprises a second reflective layer. The waveguide is configured to guide an in-coupled light beam to undergo reflections between the first reflective layer and the second reflective layer. The first plurality of grating structures are configured to disrupt the reflections to cause at least a portion of the in-coupled light beam to couple out of the waveguide and project from the first surface, the portion of the in-coupled light beam coupled out of the waveguide forming out-coupled light beams.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: June 23, 2020
    Assignee: Shenzhen Guangjian Technology Co., Ltd.
    Inventor: Fanglu Lyu
  • Patent number: 10666015
    Abstract: A laser array combining device, which comprises: a laser gain medium array, comprising at least two laser gain units, and each generates a laser beam; a shaping optical system, optical shaping to the laser beams generated by the laser gain medium array, the shaping optical system comprises: a fast axis collimating lens, arranged at an emergent side of the laser gain medium array; a field flattening lens, arranged at an emergent side of the fast axis collimating lens, correcting the field curvature of the shaping optical system; a negative lens, arranged at an emergent side of the field flattening lens; a cylindrical lens, arranged at an emergent side of the negative lens for collimating the laser beams; a dispersing optical unit, arranged at an emergent side of the shaping optical system for diffracting incident laser beams; a partial reflection optical unit, receiving laser beams emitted by the dispersing optical unit.
    Type: Grant
    Filed: December 23, 2016
    Date of Patent: May 26, 2020
    Assignee: II-VI Suwtech, Inc.
    Inventors: Shaofeng Zhang, Dashan Li, Jintao Yang, Leo Shen, Xiaobin Sun
  • Patent number: 10663680
    Abstract: An example system includes a grating coupled laser, a laser optical interposer (LOI), an optical isolator, and a light redirector. The grating coupled laser includes a laser cavity and a transmit grating optically coupled to the laser cavity. The transmit grating is configured to diffract light emitted by the laser cavity out of the grating coupled laser. The LOI includes an LOI waveguide with an input end and an output end. The optical isolator is positioned between the surface coupled edge emitting laser and the LOI. The light redirector is positioned to redirect the light, after the light passes through the optical isolator, into the LOI waveguide of the LOI.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: May 26, 2020
    Assignee: II-VI Delaware Inc.
    Inventors: Daniel Mahgerefteh, Jin-Hyoung Lee, Shiyun Lin
  • Patent number: 10663639
    Abstract: The disclosure provides a display device including an upper substrate (001) and a lower substrate (002) arranged opposite to each other, a liquid crystal layer (003), a wave guiding layer (004), electrode structures (005), and a collimated light source (006). The liquid crystal layer (003) is arranged between the upper substrate (001) and the lower substrate (002); the wave guiding layer (004) is arranged on a side of the lower substrate (002) facing the upper substrate (001), and a refractive index of the wave guiding layer (004) is at least greater than a refractive index of a film layer in contact with the wave guiding layer (004); the plurality of electrode structures (005) are arranged on a side of the upper substrate (001) facing the lower substrate (002), and the plurality of electrode structures (005) are arrayed in correspondence to sub-pixels in a one-to-one manner; and the collimated light source (006) is at least arranged on one side of the wave guiding layer (004).
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: May 26, 2020
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Wei Wang, Yafeng Yang, Xiaochuan Chen, Xianqin Meng
  • Patent number: 10634843
    Abstract: An optoelectronic device includes a substrate, having a recess formed therein. An optical isolator is mounted in the recess. A laser includes a stack of epitaxial layers on the substrate and emits a beam of radiation toward the recess along a direction parallel to a surface of the substrate. A waveguide directs the beam emitted by the laser into the optical isolator.
    Type: Grant
    Filed: February 10, 2019
    Date of Patent: April 28, 2020
    Assignee: APPLE INC.
    Inventors: Igal I. Bayn, Andrew J. Sutton, Alexander Shpunt, Jason S. Pelc, Mark A. Arbore
  • Patent number: 10620469
    Abstract: A display panel and a display device are disclosed. The display panel includes a first substrate, a liquid crystal layer, a waveguide layer, a grating layer, a quantum dot color filter layer, a first electrode and a second electrode, wherein the first electrode and the second electrode are configured to adjust a refractive index of the liquid crystal layer by changing voltages applied thereto; wherein a coupling efficiency at which light is coupled out of the waveguide layer is determined according to a difference between the refractive index of the liquid crystal layer and a refractive index of the grating layer.
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: April 14, 2020
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Jifeng Tan, Wei Wang, Xue Dong
  • Patent number: 10599024
    Abstract: A light source apparatus includes a plurality of light sources each having a light emitting area, an optical characteristic converter configured to generate emitting light having a characteristic different from that of incident light from the plurality of light sources, and a first optical system configured to irradiate the incident light on each of a plurality of irradiated areas on the optical characteristic converter. A shape of each irradiation area is non-similar to that of the light emitting area.
    Type: Grant
    Filed: December 26, 2017
    Date of Patent: March 24, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kazuhiro Inoko, Yuuki Maeda
  • Patent number: 10587090
    Abstract: The present invention provides a device and method for a laser based light source using a combination of laser diode or waveguide gain element excitation source based on gallium and nitrogen containing materials and wavelength conversion phosphor materials designed for inherent safety. In this invention a violet, blue, or other wavelength laser diode source based on gallium and nitrogen materials is closely integrated with phosphor materials, such as yellow phosphors, to form a compact, high-brightness, and highly-efficient, light source with closed loop design features to yield the light source as an eye safe light source.
    Type: Grant
    Filed: December 31, 2015
    Date of Patent: March 10, 2020
    Assignee: Soraa Laser Diode, Inc.
    Inventors: James W. Raring, Paul Rudy, Steve DenBaars, Troy Trottier
  • Patent number: 10581222
    Abstract: A tunable laser is provided, including a first reflector, a second reflector, a phase adjustment area, a gain area, a first detector, a second detector, and a controller. The phase adjustment area is located between the first reflector and the gain area, the gain area is located between the phase adjustment area and the second reflector, a reflectivity of the first reflector is adjustable, and a reflectivity of the second reflector is adjustable. The first detector is configured to convert an optical signal of the first reflector into a first electrical signal. The second detector is configured to convert an optical signal of the second reflector into a second electrical signal. The controller is configured to adjust at least one of the reflectivity of the first reflector or the reflectivity of the second reflector based on the first electrical signal and the second electrical signal.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: March 3, 2020
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Jifang He, Hongmin Chen, Hongbing Lei, Xiao Andy Shen
  • Patent number: 10574022
    Abstract: An optical component includes: a first fiber having a first end and a second end; a second fiber having a third end and a fourth end; a third fiber having a fifth end and a sixth end; a first coating layer that covers the cladding of the second fiber and has a higher refractive index than that of the cladding of the second fiber; and a first high refractive index layer that covers part of an outer peripheral surface and an end face of the second fiber. The first high refractive index layer has a higher refractive index than that of the cladding of the second fiber. The outer diameter of the cladding of the first fiber is smaller than that of the cladding of the second fiber. The outer diameter of the cladding of the third fiber is smaller than that of the cladding of the second fiber.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: February 25, 2020
    Assignee: Fujikura Ltd.
    Inventor: Hikaru Hidaka
  • Patent number: 10551562
    Abstract: Free-space coupler devices are disclosed. In one embodiment, a free-space coupler device comprises a waveguide structure including a waveguide grating, and an out-of-plane coupler separated from and in optical communication with the waveguide grating. The waveguide grating and the out-of-plane coupler are separated by a distance that will yield an optical resonance at a desired operating frequency or wavelength of an optical signal, thereby maximizing a diffraction power of the optical signal at the out-of-plane coupler while minimizing a reflection power of the optical signal at the out-of-plane coupler.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: February 4, 2020
    Assignee: Honeywell International Inc.
    Inventor: Matthew Wade Puckett
  • Patent number: 10547280
    Abstract: Various examples are provided for tunable radio frequency (RF) filtering. In one example, a RF multiband filter includes a Lyot filter including a tunable birefringence loop including a circulator and a polarization controller (PC) and a phase modulator (PM). The Lyot filter can generate an optical comb based at least in part upon a received optical signal and a polarization rotation angle of the polarization controller. The phase modulator (PM) can generate a modulated tap signal by modulating the optical comb by a RF input signal.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: January 28, 2020
    Assignee: University of Georgia Research Foundation, Inc.
    Inventors: Mable P. Fok, Jia Ge
  • Patent number: 10541661
    Abstract: Various examples are provided for highly reconfigurable multiband radio frequency (RF) filters. The multiband RF filters can be continuously tunable. In one example, a multiband RF filter includes a Lyot loop filter that can generate an optical comb using an input optical signal from a tunable Mach-Zehnder interferometer (MZI), a birefringent device, and a polarization rotation angle of a polarization controller. The tunable MZI can include a tunable delay line that can adjust comb spacing of the optical comb. In another example, a multiband RF filter includes a second MZI in series with a first MZI. The second MZI can generate a second tunable output signal from a first tunable output signal from the first MZI. In another example, the multiband RF filter can include a third MZI in series with the second MZI. The third MZI can generate a third tunable output signal from the second tunable output signal.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: January 21, 2020
    Assignee: University of Georgia Research Foundation, Inc.
    Inventors: Mable P. Fok, Jia Ge
  • Patent number: 10522974
    Abstract: An edge-emitting laser having a small vertical emitting angle includes an upper cladding layer, a lower cladding layer and an active region layer sandwiched between the upper and lower cladding layers. By embedding a passive waveguide layer within the lower cladding to layer, an extended lower cladding layer is formed between the passive waveguide layer and the active region layer. In addition, the refractive index (referred as n-value) of the passive waveguide layer is larger than the n-value of the extended lower cladding layer. The passive waveguide layer with a larger n-value would guide the light field to extend downward. The extended lower cladding layer can separate the passive waveguide layer and the active region layer and thus expand the near-field distribution of laser light field in the resonant cavity, so as to obtain a smaller vertical emitting angle in the far-field laser light field.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: December 31, 2019
    Assignee: TrueLight Corporation
    Inventors: Chien Hung Pan, Cheng-Ju Wu
  • Patent number: 10476231
    Abstract: A photonic device comprising: a support; an intermediate layer (; an optical guiding level including a waveguide and a first to a fifth waveguide section. The photonic device further includes a first dielectric layer covering the optical guiding level and a gain structure in contact with the first dielectric layer. The second and fourth waveguide sections and the first and second ends of the gain structure form a first and a second zone of optical transition between a laser hybrid waveguide, and respectively the first and the fifth waveguide sections. A pattern forming a Bragg grating is arranged over a first part of the thickness of the third waveguide section which is away from the gain structure.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: November 12, 2019
    Assignee: COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES
    Inventors: Sylvie Menezo, Torrey Thiessen