Patents Examined by Kinam Park
  • Patent number: 11005229
    Abstract: An all solid-state laser light source device comprises a diode-pump laser and the following devices sequentially arranged in an optical path direction of laser light: a coupling optical fiber, a coupling lens assembly, and a resonant cavity. An anisotropic laser crystal is provided in the resonant cavity. Absorption spectra of the anisotropic laser crystal comprise a ? polarization absorption spectrum and a ? polarization absorption spectrum. Each of the ? polarization absorption spectrum and the ? polarization absorption spectrum has a peak pump region and a left pump region and a right pump region arranged on either side of the peak pump region. Pump light outputted by diode-pump laser has a wavelength ? falling within the left pump region or the right pump region.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: May 11, 2021
    Inventors: Encai Ji, Qitao Lv, Yunfeng Gao
  • Patent number: 10998693
    Abstract: An X-ray laser has a target anode of a crystalline material that emits X-ray radiation in response to excitation and that is located on a thermally conductive substrate. An X-ray source provides an input X-ray beam that illuminates a predetermined volume of the target anode at a predefined angle relative to a surface of the anode so as to induce a Borrmann mode standing wave in the predetermined volume. An electron source outputs an electron beam that is incident on the Borrmann mode region so as to cause electron impact ionization of the crystalline material and thereby induce stimulated emission of a coherent output X-ray beam.
    Type: Grant
    Filed: January 20, 2020
    Date of Patent: May 4, 2021
    Inventors: Roger D. Durst, Juergen Graf, Christoph Ollinger
  • Patent number: 10992098
    Abstract: A waveguide gas laser having a laser resonator cavity of a variable length is subjected to cyclical varying of the length of the cavity during generation of a laser beam a length variation amount sufficient to force a laser beam generated in the resonator cavity though a substantially complete optical longitudinal cavity mode at a rate operable to smooth at least one laser beam parameter variation. In this manner variation in the laser beam parameter is averaged by moving through at least a portion of an optical longitudinal cavity mode.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: April 27, 2021
    Assignee: Epilog Corporation
    Inventors: Jeffery A Broderick, Patrick B Kohl
  • Patent number: 10992099
    Abstract: A holder and at least one terminal element that are configured and arranged with respect to one another so as to form a cavity of length ?L bounded axially by two walls the relative position of which with respect to each other varies in the opposite direction to the variation in ambient temperature, an increase in temperature causing the walls to move closer together and vice versa. A linear structure incorporating the device sees its length decrease when temperature increases and vice versa. Electro-optical transducers comprising a piezoelectric actuator of linear structure that acts on the length of a segment of optical fiber that forms the laser source of the transducer, and having such a device incorporated into the actuator in order to compensate, by modifying the length of the segment of fiber, for the variations in wavelength induced in the laser by the variations in temperature.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: April 27, 2021
    Assignee: THALES
    Inventors: François - Xavier Launay, Raphael Lardat, Gérard Roux, Christophe Oubaiche, Romain Barreau, Thomas Pastureaud
  • Patent number: 10992108
    Abstract: A collinear T-cavity VECSEL system generating intracavity Hermite-Gaussian modes at multiple wavelengths, configured to vary each of these wavelengths individually and independently. A mode converter element and/or an astigmatic mode converter is/are aligned intracavity to reversibly convert the Gaussian modes to HG modes to Laguerre-Gaussian modes, the latter forming the system output having any of the wavelengths provided by the spectrum resulting from nonlinear frequency-mixing intracavity (including generation of UV, visible, mid-IR light). The laser system delivers Watt-level output power in tunable high-order transverse mode distribution.
    Type: Grant
    Filed: November 13, 2019
    Date of Patent: April 27, 2021
    Assignee: Arizona Board of Regents on Behalf of the University of Arizona
    Inventors: Mahmoud Fallahi, Ewan Wright, Chris Hessenius
  • Patent number: 10992103
    Abstract: A laser device includes a substrate including a principal surface and a recess provided in the principal surface; a laser oscillation unit fixed to the principal surface in direct contact with the principal surface or with an adhesive interposed between the laser oscillation unit and the principal surface, the laser oscillation unit having an emission surface from which laser light that diverges as the laser light travels is emitted along the principal surface; and a reflecting member fixed to a bottom surface of the recess and having an inclined surface that is inclined with respect to the principal surface so as to reflect the laser light. At least a portion of the inclined surface is positioned in a space inside the recess.
    Type: Grant
    Filed: December 2, 2019
    Date of Patent: April 27, 2021
    Assignee: Sharp Fukuyama Laser Co., Ltd.
    Inventors: Satoshi Komada, Keisuke Miyazaki, Takashi Ono, Tetsuya Fujitani
  • Patent number: 10985521
    Abstract: A problem with a conventional waveguide type laser device is that in the case in which an isotropic laser medium is used for a core, linearly polarized light is not provided. A ridge waveguide laser device of the present disclosure includes: a substrate; a core joined to the substrate and having a laser medium, the core having a refractive index higher than that of the substrate; and a cladding joined to the core, constituting a ridge waveguide together with the core, and made from a birefringent material having ordinary and extraordinary refractive indices lower than the refractive index of the core, the ordinary and extraordinary refractive indices being different.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: April 20, 2021
    Inventors: Yojiro Watanabe, Takayuki Yanagisawa
  • Patent number: 10978850
    Abstract: A laser system, comprised of: a laser cavity; a gain medium a pump, a saturable absorber (SA); a first mirror and a second mirror; wherein a ratio of an area of the beam area within the SA to an area of the laser beam within the gain medium is greater than 1, and wherein the beam generates a gain medium radius spot on the gain medium and a saturable absorber radius spot on the saturable absorber such that a ratio between a saturable absorber radius spot on the saturable absorber and the gain medium radius spot on the gain medium is within a range of 1.7-7 is disclosed. A method for using the laser system e.g., for producing a pulsed energy is further disclosed.
    Type: Grant
    Filed: April 2, 2018
    Date of Patent: April 13, 2021
    Inventors: Salman Noach, Daniel Sebbag
  • Patent number: 10978848
    Abstract: A method of inducing light losses at a parasitic wavelength in a fiber laser system includes providing a wavelength discriminator (WD) spaced from and between feeding and process fibers or from the end output of the feeding fiber so as to induce losses of light at parasitic wavelength. The device implementing the disclosed method is configured with a laser source, the delivery fiber and WD spaced at a distance between the surface to be treated and the end of the delivery fiber, wherein the WD receives the parasitic light over free space and is configured as a dichroic filter inducing losses to the light at the parasitic wavelength.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: April 13, 2021
    Inventors: Andrey Mashkin, Valentin Fomin, Fedor Shcherbina, Alexander Dronov, Andrey Abramov, Vadim Mironov, Eugene Scherbakov
  • Patent number: 10978854
    Abstract: In example implementations of a vertical-cavity surface-emitting laser (VCSEL), the VCSEL includes a p-type distributed Bragg reflector (p-DBR) layer and a p-type ohmic (p-ohmic) contact layer adjacent to the p-DBR layer. The p-DBR layer may include an oxide aperture and the p-ohmic contact layer may have an opening that is aligned with the oxide aperture. The opening may be filled with a dielectric material. A metal layer may be coupled to the p-ohmic contact layer and encapsulate the dielectric material.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: April 13, 2021
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Sagi Mathai, Michael Renne Ty Tan, Wayne Victor Sorin
  • Patent number: 10965101
    Abstract: A plasmonic quantum well laser may be provided. The plasmonic quantum well laser includes a plasmonic waveguide and a p-n junction structure extends orthogonally to a direction of plasmon propagation along the plasmonic waveguide. Thereby, the p-n junction is positioned atop a dielectric material having a lower refractive index than material building the p-n junction, and the quantum well laser is electrically actuated. A method for building the plasmonic quantum well laser is also provided.
    Type: Grant
    Filed: November 14, 2019
    Date of Patent: March 30, 2021
    Assignee: International Business Machines Corporation
    Inventors: Heinz Schmid, Benedikt F. Mayer, Stephan Wirths, Kirsten Emilie Moselund
  • Patent number: 10965088
    Abstract: A method for generating a single-cavity dualcomb or multicomb for laser spectroscopy, the method comprising the steps of providing a laser system comprising a pump source, a gain medium, and a resonator having a spectral filter; spectrally filtering, by the spectral filter, light in the resonator and attenuating, in particular blocking, by the spectral filter, one or more wavelength bands at least one of which being located completely within the gain bandwidth of the laser system such that two or more at least partially separated spectral regions are provided; mode-locking the two or more at least partially separated spectral regions.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: March 30, 2021
    Assignee: Thorlabs, Inc.
    Inventors: Oliver H. Heckl, Georg Winkler, Jakob Fellinger
  • Patent number: 10958040
    Abstract: A method for fabricating an ellipsoidal or semi-ellipsoidal semiconductor structure includes steps of providing a semiconductor substrate and fabricating an ellipsoidal or semi-ellipsoidal cavity structure on the semiconductor substrate. The cavity structure encompasses a seed surface of the semiconductor substrate. The method includes a further step of growing the ellipsoidal or semi-ellipsoidal semiconductor structure within the ellipsoidal or semi-ellipsoidal cavity structure from the seed surface of the semiconductor substrate. Fabricating the cavity structure includes arranging a droplet comprising a sacrificial material on the semiconductor substrate, forming a layer of a coating material on the semiconductor substrate and the droplet, and selectively removing the sacrificial material of the droplet to expose the cavity structure.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: March 23, 2021
    Assignee: International Business Machines Corporation
    Inventors: Noelia Vico Trivino, Svenja Mauthe, Philipp Staudinger, Kirsten Emilie Moselund
  • Patent number: 10951002
    Abstract: A multi-frequency laser system comprises a master oscillator to generate a master beam and an arm splitter to split the master beam into a first beam and a second beam. The first beam is provided to a primary mode arm for generation of a primary mode beam and the second beam is provided to a sideband mode arm for generation of a sideband mode beam. The sideband beam arm comprises a modulator to modulate the second beam to generate a beam comprising sidebands; a filter to select a particular sideband mode from the beam comprising sidebands; an amplifier cavity to amplify the particular sideband mode and suppress other residual modes; and an acousto-optical modulator to shift the frequency of each mode of an amplified selected sideband beam to generate a sideband mode beam. The primary and sideband mode beams are provided in a coordinated manner to enact a quantum gate.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: March 16, 2021
    Assignee: Honeywell International Inc.
    Inventors: Matthew Bohn, Matthew Swallows, Patricia Lee
  • Patent number: 10944232
    Abstract: A frequency electromagnetic radiation generation system including: a non linear crystal producing THz frequency electromagnetic radiation; a fundamental beam that interacts with the non linear crystal thereby emitting a THz frequency electromagnetic radiation emission; a silicon intermediary coupled to the non linear crystal for output channeling the THz frequency electromagnetic radiation emission to an output environment; the system utilising a fundamental beam which has a photon energy below the bandgap energy of silicon.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: March 9, 2021
    Assignee: Macquarie University
    Inventors: Andrew Lee, Helen M. Pask, David James Spence
  • Patent number: 10944235
    Abstract: A light source comprises a GeSn active zone inserted between two contact zones. The active zone is formed directly on a silicon oxide layer by a first lateral epitaxial growth of a Ge germination layer followed by a second lateral epitaxial growth of a GeSn base layer. A cavity is formed between the contact zones by encapsulation and etching, so as to guide these lateral growths. A vertical growth of GeSn is then achieved from the base layer to form a structural layer. The active zone is formed in the stack of base and structural layers.
    Type: Grant
    Filed: November 21, 2019
    Date of Patent: March 9, 2021
    Assignee: Commissariat A L'Energie Atomique et aux Energies Alternatives
    Inventors: Vincent Reboud, Georgio El Zammar, Rami Khazaka, Sylvie Menezo
  • Patent number: 10938181
    Abstract: A vertical cavity surface emitting laser includes: an active layer including a quantum well structure including one or more well layers including a III-V compound semiconductor containing indium as a group III constituent element; an upper laminated region containing a carbon dopant; and a substrate for mounting a post including the active layer and the upper laminated region, in which the active layer is provided between the upper laminated region and the substrate, the quantum well structure has a carbon concentration of 2×1016 cm?3 or less, and the upper laminated region includes a pile-up layer of indium at a position away from the active layer.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: March 2, 2021
    Inventors: Kei Fujii, Takamichi Sumitomo, Suguru Arikata
  • Patent number: 10938183
    Abstract: A distributed feedback (DFB) laser outputting a predetermined wavelength of laser light includes a quantum well active layer positioned between a p-type cladding layer and an n-type cladding layer in thickness direction. The DFB laser includes a separate confinement heterostructure layer positioned between the quantum well active layer and then-type cladding layer. The DFB laser includes an electric-field-distribution-control layer positioned between the separate confinement heterostructure layer and then-type cladding layer and configured by at least two semiconductor layers having band gap energy greater than band gap energy of a barrier layer constituting the quantum well active layer. The DFB laser has a function to select a specific wavelength by returning a specific wavelength in the wavelength-variable laser.
    Type: Grant
    Filed: November 1, 2019
    Date of Patent: March 2, 2021
    Inventors: Junji Yoshida, Hirokazu Itoh, Satoshi Irino, Yuichiro Irie, Taketsugu Sawamura, Masaki Funabashi, Nobumasa Tanaka
  • Patent number: 10923879
    Abstract: It is provided a method for fabricating an electroabsorption modulated laser comprising generating a single mode laser section and an electroabsorption modulator section, comprising fabricating at least one n-doped layer of the laser section and at least one n-doped layer of the modulator section; generating an isolating section for electrically isolating at least the n-doped layer of the laser section and the n-doped layer of the modulator section from one another. Generating the isolating section comprises epitaxially growing at least one isolating layer and structuring the isolating layer before the generation of the n-doped layer of the laser section and the n-doped layer of the modulator section.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: February 16, 2021
    Inventors: Martin Moehrle, Victor Dolores Calzadilla, Marlene Zander, Francisco Soares
  • Patent number: 10923876
    Abstract: A heat exchanger configured to cool an energy output device, and systems, devices, and methods thereof, can comprise a heat exchanger housing and an internal chamber defined in the housing that is configured to be filled with a phase-change material (PCM). The internal chamber can be provided at a first predetermined level inside the housing relative to the top surface of the housing and can extend under a first predetermined portion of the top surface of the housing. The internal chamber can include a plurality of PCM channels configured to be filled with the PCM and to accommodate phase changes of the PCM in multiple phase-change directions. Optionally, the plurality of PCM channels can be defined by a plurality of fins and/or the internal chamber can be accessible to outside the housing via at least one PCM interface configured to receive and pass therethrough the PCM.
    Type: Grant
    Filed: August 9, 2019
    Date of Patent: February 16, 2021
    Assignee: Lockheed Martin Corporation
    Inventors: Aleksandra Shepsis, David L. Vos