Reflector Patents (Class 372/99)
  • Patent number: 10578277
    Abstract: A light source device includes a package, one or more semiconductor lasers each having an emission surface, a light-transmissive cover, and an optical member. The package includes an inner bottom surface and inner lateral surfaces, and a recess defined by the inner bottom surface and the inner lateral surfaces and having an open end. The one or more semiconductor lasers are arranged on the inner bottom surface. The light-transmissive cover covers the open end of the recess. The optical member is arranged on an upper surface of the cover and is configured to mix light. The one or more semiconductor lasers are arranged so that their emission surfaces are respectively oblique to their adjacent inner lateral surface when viewed from above, and the inner lateral surface has a reflecting region arranged inclined with respect to the bottom surface.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: March 3, 2020
    Assignee: NICHIA CORPORATION
    Inventor: Tadaaki Miyata
  • Patent number: 10461502
    Abstract: A two-dimensional photonic crystal surface emitting laser has, in a plate-shaped base body, a two-dimensional photonic crystal layer in which modified refractive index region pairs are periodically arranged and an active layer provided on one side of the base body, each of the modified refractive index region pairs including a first modified refractive index region and a second modified refractive index region having refractive indexes different from a refractive index of the base body, wherein an area of a planar shape of the first modified refractive index region is larger than or equal to an area of a planar shape of the second modified refractive index region, and a thickness of the first modified refractive index region is smaller than a thickness of the second modified refractive index region.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: October 29, 2019
    Assignees: KYOTO UNIVERSITY, ROHM CO., LTD., HAMAMATSU PHOTONICS K.K., MITSUBISHI ELECTRIC CORPORATION
    Inventors: Susumu Noda, Yoshinori Tanaka, Menaka De Zoysa
  • Patent number: 10389086
    Abstract: A two-dimensional photonic-crystal surface-emitting laser 10 includes: a two-dimensional photonic crystal (two-dimensional photonic crystal layer 12) including a plate-shaped base body 121 having a predetermined size in which modified refractive index areas 122 whose refractive index differs from the base body are periodically arranged in a two-dimensional pattern; an active layer 11 provided on one side of the two-dimensional photonic crystal; and first and second electrodes 15 and 16 facing each other across the two-dimensional photonic crystal and the active layer 11, for supplying an electric current to the active layer 11. The modified refractive index areas 122 are provided in such a manner that the in-plane occupancy of those areas 122 in the base body 121 decreases, or the lattice constant for those areas 122 increases, in the direction from an outer edge toward the center of a current passage region 21 which is a region where the electric current passes through the two-dimensional photonic crystal.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: August 20, 2019
    Assignees: KYOTO UNIVERSITY, ROHM CO., LTD., HAMAMATSU PHOTONICS K.K., MITSUBISHI ELECTRIC CORPORATION
    Inventors: Susumu Noda, Hitoshi Kitagawa, Yoshinori Tanaka
  • Patent number: 10361530
    Abstract: A laser apparatus including a pulsed laser radiation source is disclosed, wherein the laser radiation has spectral components in at least two wavelength ranges W1, W2 that differ from one another, and a dispersion control element including at least one dielectric multilayer mirror, wherein the laser radiation is reflected one or more times at the multilayer mirror. The multilayer mirror is reflective in the two wavelength ranges W1, W2, and the reflection of the spectral component in the second wavelength range W2 has a time delay relative to the reflection of the spectral component in the first wavelength range W1 such that the spectral components of the laser radiation reflected at the multilayer mirror in the two wavelength ranges W1, W2 coincide in time in an interaction center of the laser apparatus, and a nonlinear optical element is situated in the interaction center.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: July 23, 2019
    Assignee: TOPTICA Photonics AG
    Inventor: Alexander Sell
  • Patent number: 10230217
    Abstract: A semiconductor laser diode (LD) having an optical grating is disclosed. The LD includes a lower cladding layer that buries the optical grating, an active layer, and an upper cladding layer. The active layer has a multi-quantum well (MQW) structure of barrier layers and well layers alternately arranged. The MQW structure further includes intermediate layers between the barrier layers and the well layers. The intermediate layers have a lattice constant between that of the barrier layers and that of the well layers. Each intermediate layer has a thickness thinner than 1 nm.
    Type: Grant
    Filed: October 30, 2017
    Date of Patent: March 12, 2019
    Assignee: SUMITOMO ELECTRIC DEVICE INNOVATIONS, INC.
    Inventor: Naoki Ogawa
  • Patent number: 10206567
    Abstract: An optical coherence tomography (OCT) system combining multiple wavelengths is generally described. In an example, the OCT system includes multiple wavelength swept light sources. The system further includes an interferometer into which light from the light sources is directed and a detector configured to produce an imaging sample signal based on light received from the interferometer. The system also includes a splitter configured to split light from at least one of light sources before the light reaches the interferometer. The system also includes a wavelength reference filter having an equal interval frequency comb and a signal processing circuit. The wavelength reference filter is configured to produce a sequential clock waveform from light received from the splitter, and the signal processing circuit is configured to resample the imaging sample signal based on the sequential clock waveform.
    Type: Grant
    Filed: July 12, 2017
    Date of Patent: February 19, 2019
    Assignee: SANTEC CORPORATION
    Inventor: Changho Chong
  • Patent number: 10188519
    Abstract: An apparatus and method for laser-assisted machining (LAM) of bone without raising the temperature of the surrounding bone is discussed. The method of LAM of bone involves determining a target bone needing to be machined an then scanning a high power density laser beam along the bone at a machining rate that produces low-heat affected zones (HAZ) on the target bone. The process and apparatus is advantageous over conventional technologies because it provides a chemically clean, coherent, and monochromatic beam to the region to be machined.
    Type: Grant
    Filed: June 6, 2016
    Date of Patent: January 29, 2019
    Assignee: UNIVERSITY OF NORTH TEXAS
    Inventors: Narendra B Dahotre, Soundarapandia Santhanakrishnan
  • Patent number: 9933554
    Abstract: A laser resonator includes an active material, which amplifies light associated with an optical gain of the resonator, and passive materials disposed in proximity with the active material. The resonator oscillates over one or more optical modes, each of which corresponds to a particular spatial energy distribution and resonant frequency. Based on a characteristic of the passive materials, for the particular spatial energy distribution corresponding to at least one of the optical modes, a preponderant portion of optical energy is distributed apart from the active material. The passive materials may include a low loss material, which stores the preponderant optical energy portion distributed apart from the active material, and a buffer material disposed between the low loss material and the active material, which controls a ratio of the optical energy stored in the low loss material to a portion of the optical energy in the active material.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: April 3, 2018
    Assignees: CALIFORNIA INSTITUTE OF TECHNOLOGY, TELARIS INC.
    Inventors: Christos T. Santis, Scott T. Steger, Amnon Yariv, Naresh Satyan, George Rakuljic
  • Patent number: 9882354
    Abstract: A semiconductor laser device includes: a semiconductor laser array in which a plurality of active layers that emit laser lights with a divergence angle ?S (>4°) in a slow axis direction are arranged; a first optical element that reflects first partial lights by a first reflecting surface and returns the first partial lights to the active layers; and a second optical element that reflects partial mode lights of second partial lights by a second reflecting surface and returns the partial mode lights to the active layers, the first reflecting surface forms an angle equal to or greater than 2° and less than (?S/2) with a plane perpendicular to an optical axis direction of the active layers, and the second reflecting surface forms an angle greater than (??S/2) and equal to or less than ?2° with the plane perpendicular to the optical axis direction of the active layers.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: January 30, 2018
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Yujin Zheng, Hirofumi Kan
  • Patent number: 9791662
    Abstract: A carrier structure (100), particularly for optical components, includes a carrier body (10) which is formed from ceramic with hollows (11), and at least one cover layer (21, 22) which is formed from glass, arranged on at least one surface of the carrier body (10), and is connected to the carrier body (10) by means of at least one bond connection (23, 24) produced by means of anodic bonding. Methods for producing the carrier structure (100) and the use of the carrier structure as a mirror body, carrier for optical components and/or mechanical carrier for dynamically moved components are also described.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: October 17, 2017
    Assignee: Berliner Glas KGaA Herbert Kubatz GmbH & Co.
    Inventors: Oliver Baldus, Volker Schmidt
  • Patent number: 9677180
    Abstract: One embodiment of the present invention is a unique engine hot section component having a coating system operative to reduce heat transfer to the hot section component. Another embodiment is a unique method for making a gas turbine engine hot section component with a coating system. Other embodiments include apparatuses, systems, devices, hardware, methods, and combinations for gas turbine engines, hot section components and coating systems. Further embodiments, forms, features, aspects, benefits, and advantages of the present application shall become apparent from the description and figures provided herewith.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: June 13, 2017
    Assignees: Rolls-Royce Corporation, Rolls-Royce North America Technologies, Inc.
    Inventors: Subhash K. Naik, Charles J. Teague, James Carl Loebig
  • Patent number: 9484406
    Abstract: The present disclosure provide methods for forming nanowire structures with desired materials horizontal gate-all-around (hGAA) structures field effect transistor (FET) for semiconductor chips. In one example, a method of forming nanowire structures on a substrate includes supplying an oxygen containing gas mixture to a multi-material layer on a substrate in a processing chamber, wherein the multi-material layer includes repeating pairs of a first layer and a second layer, the first and the second layers having a first group and a second group of sidewalls respectively exposed through openings defined in the multi-material layer, and selectively forming an oxidation layer on the second group of sidewalls in the second layer.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: November 1, 2016
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Shiyu Sun, Naomi Yoshida, Bingxi Wood
  • Patent number: 9362704
    Abstract: The invention relates to a laser resonator for generating frequency-converted laser radiation, comprising a laser-active solid-state medium and a wavelength conversion crystal. A transmissive optical element having a concavely curved surface for generating collimated laser radiation is arranged in the laser resonator.
    Type: Grant
    Filed: April 25, 2012
    Date of Patent: June 7, 2016
    Assignee: Trumpf Laser Marking Systems AG
    Inventors: Carsten Ziolek, Sven Joosten, Dietmar Kruse
  • Patent number: 9170477
    Abstract: A light emitting device includes a first layer that generates light by an injection current, the first layer is provided with a first optical waveguide extending from a first light emitting section disposed on a first side surface to a first light reflecting section disposed on a second side surface, a second optical waveguide extending from the first light reflecting section to a second light reflecting section disposed on a third side surface, and a third optical waveguide extending from the second light reflecting section to a second light emitting section disposed on the first side surface, and an element of the group II or the group XII is diffused in the first light reflecting section and the second light reflecting section.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: October 27, 2015
    Assignee: Seiko Epson Corporation
    Inventor: Masamitsu Mochizuki
  • Patent number: 9160134
    Abstract: A laser includes a total reflective mirror, an output mirror, a discharge lamp, and an active laser medium. The total reflective mirror, the output mirror, and the discharge lamp define a resonant cavity. The active laser medium is filled in the resonant cavity. The total reflective mirror includes a microstructure. The microstructure is convex ring-shaped structure. The convex ring-shaped structure has a height and a width, and both the height and the width are in a range from about 0.5? to about 2?, while ? is a working wavelength of the laser.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: October 13, 2015
    Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Jun Zhu, Jing-Lei Zhu, Qun-Qing Li, Kai-Li Jiang, Chen Feng, Guo-Fan Jin, Shou-Shan Fan
  • Patent number: 9159713
    Abstract: An opto-electronic circuit board includes a substrate, a cavity, blind vias, metal layers, a first chip, a second chip, and the optical component. The substrate includes a first circuit layer, a second circuit layer, and a dielectric layer disposed between the first circuit layer and the second circuit layer. The cavity is disposed on the dielectric layer, in which the cavity extends from the first circuit layer to the second circuit layer. The blind vias are disposed at opposite sides of the cavity. The first chip is disposed on the second circuit layer with corresponding to one of the blind vias. The second chip is disposed on the second circuit layer with corresponding to the other one of the blind vias. The optical component is disposed in the cavity, in which the second surface of the optical component is connected to the first circuit layer.
    Type: Grant
    Filed: September 22, 2014
    Date of Patent: October 13, 2015
    Assignee: UNIMICRON TECHNOLOGY CORP.
    Inventors: Yin-Ju Chen, Cheng-Po Yu, Pei-Chang Huang
  • Patent number: 9077145
    Abstract: A laser includes a total reflective mirror, an output mirror, a discharge lamp, and an active laser medium. The total reflective mirror, the output mirror, and the discharge lamp define a resonant cavity. The active laser medium is filled in the resonant cavity. The total reflective mirror includes a microstructure. The microstructure is concave ring-shaped structure. The concave ring-shaped structure has a depth and a width, and both the depth and the width are in a range from about 0.5? to about 2?, while ? is a working wavelength of the laser.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: July 7, 2015
    Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Jing-Lei Zhu, Jun Zhu, Qun-Qing Li, Kai-Li Jiang, Chen Feng, Guo-Fan Jin, Shou-Shan Fan
  • Patent number: 9042422
    Abstract: Disclosed is an ASE-free continuously tunable external resonator laser in which reduction in tuning range and decrease in output are suppressed. The external resonator laser comprises: a fixed support body which has a half mirror that partially reflects incident light and partially transmits incident light fixed therein; and a rotatory support body which is rotatably supported by the fixed support body by way of a shaft, and which has a laser chip that emits light, a collimator lens that collimates light emitted from the laser chip, and a diffraction grating that diffracts light emitted from the laser chip, fixed therein.
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: May 26, 2015
    Assignee: NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITY
    Inventors: Kiyohumi Muro, Tomohisa Endo, Yasutaka Shimada, Daisuke Fukuoka
  • Patent number: 9042414
    Abstract: A tunable laser source that includes multiple gain elements and uses a spatial light modulator in an external cavity to produce spectrally tunable output is claimed. Several designs of the external cavity are described, targeting different performance characteristics and different manufacturing costs for the device. Compared to existing devices, the tunable laser source produces high output power, wide tuning range, fast tuning rate, and high spectral resolution.
    Type: Grant
    Filed: June 7, 2011
    Date of Patent: May 26, 2015
    Assignee: Spectral Sciences, Inc.
    Inventors: Pajo Vukovic-Cvijin, Neil Goldstein
  • Patent number: 9036669
    Abstract: An apparatus comprising an optical medium, a power splitter coupled to the optical medium, a first delay line coupled to the power splitter such that the power splitter is positioned between the first delay line and the optical medium, a first comb reflector coupled to the first delay line such that the first delay line is positioned between the first comb reflector and the power splitter, and a second comb reflector coupled to the power splitter but not the first comb reflector and not the first delay line. A method comprising receiving an optical signal, splitting the optical signal into a first split optical signal and a second split optical signal, delaying the first split optical signal, tuning the delayed first split optical signal, tuning the second split optical signal, and delaying the tuned second split optical signal.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: May 19, 2015
    Assignee: Futurewei Technologies, Inc.
    Inventors: Hongmin Chen, Hongbing Lei, Xiao A. Shen
  • Patent number: 9036677
    Abstract: An optical gain architecture includes a pump source and a pump aperture. The architecture also includes a gain region including a gain element operable to amplify light at a laser wavelength. The gain region is characterized by a first side intersecting an optical path, a second side opposing the first side, a third side adjacent the first and second sides, and a fourth side opposing the third side. The architecture further includes a dichroic section disposed between the pump aperture and the first side of the gain region. The dichroic section is characterized by low reflectance at a pump wavelength and high reflectance at the laser wavelength. The architecture additionally includes a first cladding section proximate to the third side of the gain region and a second cladding section proximate to the fourth side of the gain region.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: May 19, 2015
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Andrew James Bayramian, Kenneth R. Manes, Robert Deri, Alvin Erlandson, John Caird, Mary L. Spaeth
  • Patent number: 9031113
    Abstract: The invention relates to an optical resonator, laser apparatus and a method of generating a laser beam inside an optical resonator. The optical resonator (100) includes an optical cavity (102) and an optical element (104.1, 104.2) at either end thereof, operable to sustain a light beam (108) therein, characterized in that each optical element (104.1, 104.2) is a phase-only optical element operable to alter a mode of the beam (108) as it propagates along the length of the optical resonator (100), such that in use the beam (108) at one end of the optical resonator (100) has a Gaussian profile while the beam (108) at the other end of the optical resonator (100) has a non-Gaussian profile.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: May 12, 2015
    Assignee: CSIR
    Inventors: Ihar Anatolievich Litvin, Andrew Forbes
  • Patent number: 9020004
    Abstract: A ring resonator is connected to an optical amplifier. The ring resonator and optical amplifier are contained within the optical path of an optical resonator formed by a first and second reflector. The optical coupler branches part of the light conducting from the optical amplifier to the ring resonator within the optical resonator off to an output optical waveguide.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: April 28, 2015
    Assignee: Fujitsu Limited
    Inventor: Seokhwan Jeong
  • Publication number: 20150102864
    Abstract: A light emitting device includes a first semiconductor multilayer film mirror of a first conductivity type, a second semiconductor multilayer film mirror of a second conductivity type that is different from the first conductivity type, an active layer formed between the first semiconductor multilayer film mirror and the second semiconductor multilayer film mirror, a third semiconductor multilayer film mirror of a semi-insulating type formed between the first semiconductor multilayer film mirror and the active layer, and a contact layer of the first conductivity type formed between the third semiconductor multilayer film mirror and the active layer, and the third semiconductor multilayer film mirror is formed of a material having a bandgap energy higher than an energy of light generated in the active layer.
    Type: Application
    Filed: October 15, 2014
    Publication date: April 16, 2015
    Inventor: Tetsuo NISHIDA
  • Patent number: 9007678
    Abstract: A monolithic fixed optical delay generator includes an optical substrate having a front face and a back face. A front coating is on the front face and a back coating is on the back face. The front coating is (i) highly reflective to a first wavelength and highly transmissive to a second wavelength while the back coating is highly reflective to the second wavelength, or (ii) the front coating is highly reflective to the second wavelength and is highly transmissive to the first wavelength while the back coating is highly reflective to the first wavelength.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: April 14, 2015
    Assignee: Lockheed Martin Corporation
    Inventor: Edward Miesak
  • Patent number: 9001861
    Abstract: A device for producing a coherent bi-color light source, including: an array substrate, a first laser tube driven by a first direct current signal, a second laser tube driven by a modulation signal coupled by a microwave signal and a second DC signal, a half wave plate, a birefringent crystal, a first quarter wave plate, a partially reflecting plane mirror, and a second quarter wave plate. The first laser tube and the second laser tube are fixed on the array substrate. The half wave plate, the birefringent crystal, the first quarter wave plate, the partially reflecting plane mirror, and the second quarter wave plate are disposed in sequence in an emission direction of a laser beam emitted by the first laser tube. The second laser tube is disposed opposite to the birefringent crystal.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: April 7, 2015
    Assignee: Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences
    Inventors: Enxue Yun, Bozhong Tan, Sihong Gu
  • Patent number: 8995480
    Abstract: The present disclosure relates to a tunable laser module including a light gain area unit for outputting an optical signal; an optical distributor for separating the optical signal output from the light gain area unit; two comb reflection units for reflecting a part of optical signals separated by the optical distributor and allow a part of the optical signals to penetrate; two phase units for changing phases of the optical signals penetrating the two comb reflection units; an optical coupler for combining the optical signals of which the phases are changed by the two phase units; and an optical amplifier for amplifying the optical signal combined by the optical coupler, wherein the light gain area unit oscillates a laser by totally reflecting the optical signals reflected by the two comb reflection units.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: March 31, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Ki-Hong Yoon, O-Kyun Kwon, Su Hwan Oh, Kisoo Kim, Byung-seok Choi, Hyun Soo Kim
  • Patent number: 8995495
    Abstract: A tunable DBR laser including: an amplifier section, a part-reflecting optical output, a connection section connected to the amplifier section, and at least two wavelength-selective reflectors optically coupled to the amplifier section via the connection section. The connection section includes at least one MMI coupler and several waveguides, so that different optical paths lead from the amplifier section to the wavelength-selective reflectors and each of the different optical paths leads through the at least one MMI coupler and through one of the waveguides. The wavelength-selective reflectors differ from one another by having different reflection spectra and each of the wavelength-selective reflectors is connected to one of several outputs of the at least one MMI coupler. By activating a phase shifter, arranged in a course of at least one of the waveguides, the DBR laser can be switched between different resonators.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: March 31, 2015
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V.
    Inventors: Martin Schell, Patrick Runge
  • Patent number: 8982922
    Abstract: An aspect of the disclosed subject matter includes a method of reducing the laser absorption of a beam reverser prism consisting of at least one of the following: increasing a first distance between a first incident point and a chamfered corner, wherein the first incident point is on a first reflective surface of the prism and the chamfered corner is formed between the first reflective surface and a second reflective surface of the prism, wherein the chamfered corner has a chamfered surface; increasing a second distance between a second incident point and the chamfered corner, wherein the second incident point is on the second reflective surface of the prism; and increasing a reflectivity of the chamfered surface of the chamfered corner of the prism. A method of determining a prime cut for an optical component is also disclosed. A laser including at least one prime cut optical component is also disclosed.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: March 17, 2015
    Assignee: Cymer, LLC
    Inventors: Hong Ye, Alex Ershov, Rajasekhar Rao, Daniel Brown, Slava Rokitski, Rong (Lauren) Liu, Ray Cybulski, James J. Ferrell, Robert Bergstedt, John Viatella, Thomas Duffey
  • Patent number: 8976834
    Abstract: A method of generating intra-resonator laser light (1) comprises the steps of coupling input laser light (2), e. g.
    Type: Grant
    Filed: September 6, 2010
    Date of Patent: March 10, 2015
    Assignee: Max-Planck-Gesellschaft zur Foerderung der Wissenschaften e.V.
    Inventors: Jan Kaster, Ioachim Pupeza, Ernst Fill, Ferenc Krausz
  • Patent number: 8976820
    Abstract: To provide a passive Q-switch-type solid laser apparatus for outputting a high peak-power pulse laser whose pulse energy is large and pulse-time width is small. A passive Q-switch-type solid laser apparatus has: two reflection elements for forming an oscillator; a solid gain medium being disposed between the two reflection elements; a saturable absorber being disposed between the two reflection elements; an excitation device for exciting the solid gain medium; and a cross section control device for making at least one of a stimulated emission cross section of the solid gain medium and an absorption cross section of the saturable absorber closer to another one of them; and the cross section control device is equipped with at least one or both of a temperature control device for retaining the solid gain medium at a predetermined temperature and an oscillatory-wavelength control device for fixating an oscillatory wavelength at a predetermined wavelength.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: March 10, 2015
    Assignee: Inter-University Research Institute Corporation National Institutes of Natural Sciences
    Inventors: Takunori Taira, Simon Joly, Rakesh Bhandari
  • Patent number: 8971360
    Abstract: An optical module includes a light source. The light source can be a swept wavelength light source, and optical module includes a wavemeter. The wavemeter includes a wavemeter tap capable of directing a wavemeter portion of light produced by the light source away from a main beam, a wavelength selective filter arranged to receive the wavemeter portion, a first wavemeter detector arranged to measure a transmitted radiation intensity of radiation transmitted through the filter, and a second wavemeter detector arranged to measure a non-transmitted radiation intensity of radiation not transmitted through but reflected by the filter. In addition, an optical coherence tomography apparatus includes the optical module.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: March 3, 2015
    Assignee: Exalos AG
    Inventors: Jan Lewandowski, Marcus Duelk, Christian Velez
  • Patent number: 8971375
    Abstract: The present invention relates to a surface-emitting laser diode with an active amplifying region (2) which is bounded by two laser mirrors (1, 3), while one or more polarization-selective layers (4) are provided for stabilizing the polarization in a region that is located on that side of at least one of the laser mirrors (1, 3) that is opposite the active amplifying region (2), these layers (4) extending parallel to the respective mirror (1; 3) and having a polarization-dependent refractive index and/or absorption.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: March 3, 2015
    Assignee: Vertilas, GmbH
    Inventors: Markus-Christian Amann, Markus Ortsiefer, Jürgen Rosskopf
  • Publication number: 20150049342
    Abstract: A surface light-emitting laser comprising an upper reflector, a lower reflector, and an active layer interposed therebetween, wherein when an optical distance between the upper reflector and the lower reflector is referred to as a first distance, and an optical distance between the lower reflector and the active layer is referred to as a second distance, positions of at least selected two of a group including the upper reflector, the lower reflector, and the active layer are changed so that the ratio between the first distance and the second distance is maintained within a range of ±25% from a certain value.
    Type: Application
    Filed: August 13, 2014
    Publication date: February 19, 2015
    Inventor: Yasuhiro Nagatomo
  • Patent number: 8958454
    Abstract: The slant of a first mirror (21), the slant of a second mirror (22), and the laser output when the slant of the first mirror (21) is an initial value and when the slant of the first mirror (21) is made to move from the initial value by exactly a predetermined value in the positive and negative directions are used as the basis to calculate a first approximation curve of the laser output with respect to the slant of the first mirror (21) and second approximation curve of the laser output with respect to the slant of the second mirror (22), set a value which corresponds to a local maximum value of the first approximation curve as the slant of the first mirror (21), and set a value which corresponds to a local maximum value of the second approximation curve as the slant of the second mirror (21).
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: February 17, 2015
    Assignee: Fanuc Corporation
    Inventors: Takanori Sato, Takafumi Murakami
  • Patent number: 8958453
    Abstract: A laser oscillator includes: a optical resonator having an orthogonal mirror and a partial reflection mirror; a laser gas acting as a laser medium; and a 90-degree folding mirror acting as a polarization selecting element. The orthogonal mirror has two reflecting surfaces orthogonal to each other. The 90-degree folding mirror is arranged such that the polarization direction of the laser oscillated light is parallel to the reference axis set in a plane perpendicular to an optical axis of the optical resonator. The orthogonal mirror is arranged such that the polarization direction of the laser oscillated light is parallel to the valley line of the orthogonal mirror. This configuration can compensate anisotropy of optical characteristics in a laser medium, and stably generate linearly polarized laser light having excellent isotropy in a simple manner.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: February 17, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shuichi Fujikawa, Junichi Nishimae, Tatsuya Yamamoto, Yoichi Tanino
  • Publication number: 20150043002
    Abstract: The present invention concerns the use of hybrid metal-dielectric optical coatings as the end reflectors of laser cavities and/or in the mirror structures used in other optical resonators, such as Fabry-Perot tunable filters, along with the use of such Fabry-Perot tunable filters in wavelength swept sources such as lasers. Hybrid metal-dielectric optical coatings have reflectivity spectra that can be broader than pure dielectric coatings, offer optical reflectivities higher than metal, as high as pure dielectric coatings, eliminate mirror transmission that can cause parasitic light reflections, and use fewer layers and thus have lower mass and higher mechanical resonant frequency for movable mirror applications An important characteristic of these coatings concerns the non-reflected light. Pure dielectric coatings offer high reflectivity, while the non-reflected portion of the light is transmitted by the coating to the substrate, for example.
    Type: Application
    Filed: August 12, 2013
    Publication date: February 12, 2015
    Inventors: Mark E. Kuznetsov, Ranko Galeb
  • Patent number: 8948220
    Abstract: A microcrystal laser assembly including a gain-crystal includes a frame having a high thermal conductivity. The frame has a base with two spaced apart portions extending from the base. The gain-crystal has a resonator output minor on one surface thereof. The gain-crystal is supported on the spaced-apart portions of the frame in the space therebetween. Another resonator minor is supported in that space, spaced apart from the output mirror, on a pedestal attached to the base of the frame. The pedestal and the frame have different CTE. Varying the frame temperature varies the spacing between the resonator minors depending on the CTE difference between the pedestal and the frame.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: February 3, 2015
    Assignee: Coherent GmbH
    Inventor: Stefan Spiekermann
  • Patent number: 8942267
    Abstract: A tunable laser has a solid state laser medium having an optical gain region and generates coherent radiation through a facet. A lens collects the coherent radiation and generates a collimated light beam. Components of an external cavity include a reflective surface and an optical filter, the reflective surface reflecting the collimated beam back to the lens and the laser medium, the optical filter positioned between the reflective surface and the lens and having two surfaces with a thermally tunable optical transmission band within the optical gain region of the laser medium. The optical filter (1) transmits a predominant portion of the collimated beam at a desired wavelength of operation, and (2) specularly reflects a remaining portion of the collimated beam from each surface, the collimated beam being incident on the optical filter such that the reflected collimated beams propagate at a non-zero angle with respect to the incident collimated beam.
    Type: Grant
    Filed: May 16, 2012
    Date of Patent: January 27, 2015
    Assignee: Redshift Systems Corporation
    Inventors: Eugene Yi-Shan Ma, Charles M. Marshall
  • Patent number: 8937983
    Abstract: A device for transformation of concentrated solar energy including a photovoltaic cell and laser device, which includes a first reflecting mirror adapted for entry of a beam of solar rays and a second reflecting mirror adapted for an outlet of a laser beam, with the first reflecting mirror reflective on an outlet wavelength of the laser beam and transparent to a totality of a solar spectrum and the second reflecting mirror partially reflective on the wavelength of the laser beam, reflective in an interval of the solar spectrum which is absorbed and transparent in other wavelengths different to these, and at the outlet of the laser beam. The device includes a nucleus doped with substances for total or partial absorption of the solar spectrum and coatings.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: January 20, 2015
    Assignee: Abengoa Solar New Technologies, S.A.
    Inventors: Juan Pablo Nunez Bootello, Manuel Gallas Torreira
  • Patent number: 8929408
    Abstract: Apparatus, systems, and methods of generating multi combs can be used in a variety of applications. In various embodiments, an etalon can be disposed in the laser cavity of a mode-locked laser to adjust frequency combs. Additional apparatus, systems, and methods are disclosed.
    Type: Grant
    Filed: January 22, 2013
    Date of Patent: January 6, 2015
    Assignee: STC.UNM
    Inventors: Jean-Claude Diels, Ladan Arissian, Koji Masuda
  • Patent number: 8923359
    Abstract: The presently disclosed technique presents laser-based method and apparatus for use in remote sensing. In general, objects within a field of view are lased by a long cavity laser apparatus. Returns are detected, captured, and processed to identify actual objects of interest. These can then be communicated to a user. Over time, the actual objects of interest can be auto-tracked.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: December 30, 2014
    Assignee: Lockheed Martin Corporation
    Inventors: Gary Paul Perryman, Mark K. Browder, James Richard Wood
  • Patent number: 8923358
    Abstract: A two-dimensional photonic crystal surface emitting laser light source includes a two-dimensional photonic crystal made of a plate-shaped body material provided with a periodic arrangement of identically-shaped holes and an active layer. The hole is not located on a first half-line extending from the gravity center of the hole, while the hole is located on a second half-line extending in the direction opposite to the first half-line. Injecting electric charges into the active layer generates light, which creates an electric field encircling the gravity center. For a given point on the second half-line where the hole is located, there is no hole at a point that is symmetrical to the aforementioned point with respect to the gravity center, so that the electric field vectors at the two points do not cancel each other and the laser light is stronger than conventional examples.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: December 30, 2014
    Assignees: Kyoto University, Rohm Co., Ltd.
    Inventors: Susumu Noda, Yoshitaka Kurosaka, Eiji Miyai, Dai Ohnishi, Wataru Kunishi
  • Patent number: 8913645
    Abstract: The invention relates to a laser cavity with central extraction by polarisation for coherent coupling of intense intra-cavity beams. The laser cavity (1) according to the invention comprises an extraction unit (7) with central extraction, which divides the laser cavity (1) longitudinally into two functional portions (P1, P2), namely a first portion (P1) including the active components (3), which amplifies the laser beams (4), and a second portion (P2) which performs coherent coupling of the laser beams (4).
    Type: Grant
    Filed: May 4, 2011
    Date of Patent: December 16, 2014
    Assignees: Compagnie Industrielle des Laser CILAS, Astrium SAS
    Inventors: David Sabourdy, Jean-Eucher Montagne, Alain Barthelemy, Agnes Desfarges-Berthelemot, Vincent Kermene, Sandrine Auroux, Julien Guillot, Brigitte Serreault, Bruno Esmiller
  • Patent number: 8913640
    Abstract: A semiconductor laser assembly has at least one semiconductor laser which is designed to emit laser radiation through an exit area and at least one further area, the further area being a part of a surface of the semiconductor laser and/or of the semiconductor laser assembly and the further area is developed to be reflecting to the radiation of at least one specifiable wavelength range. For this purpose, a reflecting metal layer is applied, for example. The semiconductor laser having a laser layer is able to be fastened to a carrier element with the aid of a solder layer.
    Type: Grant
    Filed: September 8, 2011
    Date of Patent: December 16, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Mathias Moenster, Hans-Jochen Schwarz
  • Publication number: 20140355639
    Abstract: Techniques described herein are generally related to metamaterial structures for Q-switching in laser systems. The various described techniques may be applied to methods, systems, devices or combinations thereof. Sonic described metamaterial structures may include a substrate and a first conductive layer disposed on a first surface of the substrate. A dielectric layer may be disposed on a first surface of the first conductive layer and a second conductive layer having a substantially symmetric geometric shape may be disposed on a first surface of the dielectric layer. The second conductive layer may cover a portion of the first surface of the dielectric layer.
    Type: Application
    Filed: April 17, 2013
    Publication date: December 4, 2014
    Inventors: Ramakrishna Subramaniam Anantha, Govind Dayal Singh
  • Publication number: 20140355640
    Abstract: A device for producing a coherent bi-color light source, including: an array substrate, a first laser tube driven by a first direct current signal, a second laser tube driven by a modulation signal coupled by a microwave signal and a second DC signal, a half wave plate, a birefringent crystal, a first quarter wave plate, a partially reflecting plane mirror, and a second quarter wave plate. The first laser tube and the second laser tube are fixed on the array substrate. The half wave plate, the birefringent crystal, the first quarter wave plate, the partially reflecting plane mirror, and the second quarter wave plate are disposed in sequence in an emission direction of a laser beam emitted by the first laser tube. The second laser tube is disposed opposite to the birefringent crystal.
    Type: Application
    Filed: August 13, 2014
    Publication date: December 4, 2014
    Inventors: Enxue YUN, Bozhong TAN, Sihong GU
  • Patent number: 8902937
    Abstract: The present disclosure relates to a compact external cavity tunable laser apparatus. The laser apparatus includes a substrate, an external cavity tunable reflecting unit that reflects laser light entering from the outside on the substrate and selects and varies a wavelength of the reflected laser light, an optical fiber that outputs the laser light on the substrate; and an highly integrated light source that integrates the laser light input from the external cavity tunable reflecting unit using inclined input and output waveguides, a curved waveguide, and a straight waveguide to output the integrated laser light to the optical fiber in order to match an optical axis formed with the external cavity tunable reflecting unit with an optical axis formed with an optical fiber.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: December 2, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Ki-Hong Yoon, O-Kyun Kwon, Kisoo Kim, Byungseok Choi, Hyun Soo Kim, Su Hwan Oh
  • Patent number: 8897327
    Abstract: A laser diode device including a housing having a mounting area in a cavity of the housing, at least one laser diode chip that emits electromagnetic radiation through a radiation exit area during operation, at least one covering element which is transmissive, at least in places, to the electromagnetic radiation generated by the laser diode chip during operation, and a deflection element, that directs at least part of the electromagnetic radiation generated by the laser diode chip during operation in a direction of the covering element, wherein the radiation exit area of the laser diode chip runs substantially transversely or substantially perpendicularly with respect to the mounting area and/or with respect to the covering element, the covering element connects to the housing, and the covering element tightly closes the housing.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: November 25, 2014
    Assignee: OSRAM Opto Semiconductors GmbH
    Inventors: Karsten Auen, Uwe Strauss, Thomas Höfer
  • Patent number: 8891579
    Abstract: A laser diode apparatus including a mounting block, a plurality of diode lasers mounted to the mounting block and each capable of emitting a respective diode laser beam, and a plurality of cylindrical mirrors each having a reflective back surface for providing slow axis collimation of an incident diode laser beam via reflection off the back surface, each one of the plurality of cylindrical mirrors optically coupled to a respective diode laser of the plurality of diode lasers and optically oriented therewith so as to be capable of providing the diode laser beams in a stacked arrangement.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: November 18, 2014
    Assignee: nLIGHT Photonics Corporation
    Inventors: Kirk Price, Scott Lerner