Patents Examined by Xinning (Tom) Niu
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Patent number: 11799263Abstract: An electro-optic modulator (EOM) for altering an optical path length of an optical field is described. The EOM comprises first and second Brewster-angle cut nonlinear crystals having a first and second optical axis. The optical axes are orientated relative to each other such that when an optical field propagates through the nonlinear crystals it experiences no overall deviation. The nonlinear crystals are also arranged to be opposite handed relative to the optical field. The EOM has the advantage that its optical losses are lower when compared with those EOMs known in the art. In addition, the EOM can be inserted into, or removed from, an optical system without any deviation being imparted onto the optical field. This reduces the levels of skill and effort required on the part of an operator. The described method and apparatus for mounting the nonlinear crystals also suppresses problematic piezo-electric resonances within the nonlinear crystals.Type: GrantFiled: June 13, 2018Date of Patent: October 24, 2023Assignee: M Squared Lasers LimitedInventors: Gareth Thomas Maker, Graeme Peter Alexander Malcolm, Simon Munro
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Patent number: 11791602Abstract: A laser system, comprising: a laser cavity, a gain medium positioned within the laser cavity, a pump source optically coupled to the gain medium, an input minor positioned at a first end of the laser cavity, an output coupler positioned at a second end of the laser cavity, a first etalon positioned within the laser cavity, and a q-switching element positioned within the laser cavity, wherein the laser system is configured to provide a laser beam at a selected wavelength ranging of 1700 to 3000 nm with a tunable spectral range of at least 10 nm. A method for using the laser system e.g., for producing a pulsed laser beam is further disclosed.Type: GrantFiled: May 22, 2019Date of Patent: October 17, 2023Assignee: JERUSALEM COLLEGE TECHNOLOGYInventors: Salman Noach, Uzziel Sheintop, Eytan Moshe Perez
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Patent number: 11791601Abstract: A pulsed current source comprises a power source, a discharge capacitor, and an inductive element. The discharge capacitor is selectively coupled to either of the power source or the inductive element. When coupled to the power source, the discharge capacitor is charged. The inductive element can be connected to a load. The load can have a current-dependent impedance. When the discharge capacitor is coupled to the inductive element, the discharge capacitor discharges through the inductive element and the load. The discharge capacitor and the inductive element are configured so that the current through the load exhibits a substantially linear rise in a linear operational region. The inductive element is configured to saturate during discharge of the capacitor through the load, so that the saturation of the inductive element causes the current through the load to continue to rise in a substantially linear fashion.Type: GrantFiled: February 9, 2021Date of Patent: October 17, 2023Assignee: National Technology & Engineering Solutions of Sandia, LLCInventor: William C. Curtis, III
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Patent number: 11789147Abstract: A semiconductor optical amplifier includes: a substrate; a light source unit formed on the substrate; and an optical amplification part that amplifies light propagating in a predetermined direction from the light source unit and emits the amplified light in an emission direction intersecting with the substrate surface. The optical amplification part includes a conductive region extending in the predetermined direction along the substrate surface from the light source unit, and a nonconductive region formed around the conductive region. The conductive region includes a first region extending from the light source unit and having a predetermined width as seen from a direction perpendicular to the substrate surface, and a second region connected to the first region and having a width widened relative to the predetermined width of the first region, the second region being configured to expand the propagation light in a direction intersecting with the predetermined direction.Type: GrantFiled: March 30, 2020Date of Patent: October 17, 2023Assignees: FUJIFILM BUSINESS INNOVATION CORP., TOKYO INSTITUTE OF TECHNOLOGYInventors: Junichiro Hayakawa, Daiki Tominaga, Akemi Murakami, Fumio Koyama
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Patent number: 11784459Abstract: A light emitting element mounting package includes a plate-like substrate and a base that protrudes from a front surface of the substrate and has a mounting surface on which a light emitting element is mounted. A power supply terminal is provided on the front surface of the substrate, and the power supply terminal is arranged in a direction that is opposite to a direction where an emitting surface of the light emitting element is oriented. The light emitting element mounting package further includes a wiring conductor inside the substrate, wherein the wiring conductor extends to a side of the power supply terminal where one end thereof is positioned at a side of the power supply terminal with respect to the emitting surface of the light emitting element and the other end thereof is electrically connected to the power supply terminal.Type: GrantFiled: December 1, 2021Date of Patent: October 10, 2023Assignee: KYOCERA CorporationInventors: Sentarou Yamamoto, Youji Furukubo, Masanori Okamoto, Toshifumi Higashi
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Patent number: 11784453Abstract: A laser system includes a beam shaping unit, a random phase plate, and a collimating optical system in an optical path between a solid-state laser device and an excimer amplifier. When a traveling direction of a laser beam entering the excimer amplifier is a Z direction, a discharge direction of a pair of discharge electrodes is a V direction, a direction orthogonal to the V and Z directions is an H direction, a shaping direction of the beam shaping unit corresponding to the V direction is a first direction, a shaping direction of the beam shaping unit corresponding to the H direction is a second direction, an expansion rate in the first direction is E1, and an expansion rate in the second direction is E2, the beam shaping unit expands a beam section of the laser beam such that an expansion ratio defined by E2/E1 is higher than 1.Type: GrantFiled: November 3, 2021Date of Patent: October 10, 2023Assignee: Gigaphoton Inc.Inventors: Yuki Tamaru, Taisuke Miura
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Patent number: 11777277Abstract: A semiconductor laser comprises a window structure part including a low resistance active layer formed in end face regions, to have a lower resistance than an active layer located inward with respect to the end face regions. A length between the front end of the contact layer and the front end face is longer by 10 ?m or more than a length of a front-end-face side window structure part, and is shorter than a length between the front end face and the rear end of the contact layer. A length between an end of a rear side electrode on the side of the front end face and the front end face is 1.2 times or more a substrate thickness of a substrate, and is shorter than a length between the front end face and an end of the rear side electrode on the side of the rear end face.Type: GrantFiled: September 12, 2018Date of Patent: October 3, 2023Assignee: Mitsubishi Electric CorporationInventor: Kyosuke Kuramoto
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Patent number: 11774828Abstract: A supercontinuum radiation source including a modulator being operable to modulate pump laser radiation including a train of radiation pulses to provide modulated pump laser radiation, the modulation being such to selectively provide a burst of the pulses; and a hollow-core photonic crystal fiber being operable to receive the modulated pump laser radiation and excite a working medium contained within the hollow-core photonic crystal fiber so as to generate supercontinuum radiation.Type: GrantFiled: May 4, 2021Date of Patent: October 3, 2023Assignee: ASML NETHERLANDS B.V.Inventors: Sebastian Thomas Bauerschmidt, Peter Maximilian Götz, Patrick Sebastian Uebel
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Patent number: 11777271Abstract: Disclosed are methods of and apparatus for extending a useful lifetime of a laser discharge chamber in which a polarity of an electrode positioned at a fixed position within the chamber is caused to be positive with respect to the polarity of a second electrode defining a discharge gap with the first electrode and the first electrode is made of a material that forms an erosion resistant surface when the first electrode is used and an anode. Also disclosed is an arrangement in which a first electrode is positionable with respect a second electrode defining a discharge gap with the second electrode and the position of the first electrode controlled to maintain the width of the gap within a predetermined range.Type: GrantFiled: October 9, 2018Date of Patent: October 3, 2023Assignee: Cymer, LLCInventors: Thomas Patrick Duffey, Paul Christopher Melcher, Walter Dale Gillespie
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Patent number: 11769986Abstract: In various embodiments, the concentration and deposition of siloxane materials within components of laser systems, such as laser resonators, is reduced or minimized utilizing mitigation systems that may also supply gas having low siloxane levels into multiple different components in series or in parallel.Type: GrantFiled: July 19, 2022Date of Patent: September 26, 2023Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Bryan Lochman, Wang-Long Zhou, Francisco Villarreal-Saucedo, Bien Chann
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Patent number: 11769981Abstract: The embodiments disclosed herein reduce numerous active regulators (e.g., to only one) used in previous circuits that require regulated current and still accomplish the current regulation provided to each load by means of an array of autotransformers, and if required, rectifiers, and filters. Therefore, in an exemplary embodiment, there is eliminated the numerous active regulators by replacing them with simple passive components and an active regulator.Type: GrantFiled: March 27, 2020Date of Patent: September 26, 2023Assignee: Government of the United States as represented by the Secretary of the Air ForceInventor: James Peter O'Loughlin
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Patent number: 11769979Abstract: An on-chip ultra-narrow linewidth laser and a method for obtaining a single-longitudinal mode ultra-narrow linewidth optical signal are provided in the present invention.Type: GrantFiled: November 18, 2020Date of Patent: September 26, 2023Assignee: Chongqing UniversityInventors: Tao Zhu, Ligang Huang, Lei Gao, Guolu Yin
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Patent number: 11757251Abstract: A QCL may include a substrate, an emitting facet, and semiconductor layers adjacent the substrate and defining an active region. The active region may have a longitudinal axis canted at an oblique angle to the emitting facet of the substrate. The QCL may include an optical grating being adjacent the active region and configured to emit one of a CW laser output or a pulsed laser output through the emitting facet of substrate.Type: GrantFiled: October 11, 2022Date of Patent: September 12, 2023Assignee: UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC.Inventor: Arkadiy Lyakh
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Patent number: 11757254Abstract: An optoelectronic semiconductor device comprises a plurality of laser devices. Each of the laser devices is configured to emit electromagnetic radiation. The laser devices are horizontally arranged. A first laser device of the plurality of laser devices is configured to emit electromagnetic radiation having a first wavelength different from the wavelength of a further laser device of the plurality of laser devices. A difference between the first wavelength and the wavelength of the further laser device is less than 20 nm.Type: GrantFiled: August 10, 2020Date of Patent: September 12, 2023Assignee: OSRAM OPTO SEMICONDUCTORS GMBHInventors: Peter Fuchs, Ann Russell, Thomas Falck, Hubert Halbritter, Bruno Jentzsch, Christian Lauer
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Patent number: 11757250Abstract: A portable lighting apparatus is provided with a gallium-and-nitrogen containing laser diode based white light source combined with an infrared illumination source which are driven by drivers disposed in a printed circuit board assembly enclosed in a compact housing and powered by a portable power supply therein. The portable lighting apparatus includes a first wavelength converter configured to output a white-color emission and an infrared emission. A beam shaper may be configured to direct the white-color emission and the infrared emission to a front aperture of a compact housing of the portable lighting apparatus. An optical transmitting unit is configured to project or transmit a directional light beam of the white light emission and/or the infrared emission for illuminating a target of interest, transmitting a pulsed sensing signal or modulated data signal generated by the drivers therein. In some configurations, detectors are included for depth sensing and visible/infrared light communications.Type: GrantFiled: December 23, 2019Date of Patent: September 12, 2023Assignee: KYOCERA SLD Laser, Inc.Inventors: James W. Raring, Paul Rudy
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Patent number: 11744003Abstract: Disclosed is a device for interaction between a laser beam and a hyperfine energy transition of a chemical species. The device further includes an electro-optic modulator with a single sideband with an input optical waveguide suitable for receiving a source laser beam and an output optical waveguide suitable for generating an output laser beam and an electronic system suitable for generating and applying, simultaneously, a first modulated electrical signal, sin(?1t)) to a first hyperfrequency pulse on a first high-frequency electrode of the electro-optic modulator and, respectively, another modulated electrical signal, cos(?1t)) to the first pulse on another high-frequency electrode of the electro-optic modulator, in such a way as to frequency-switch the output laser beam to a first optical frequency offset from the first pulse with respect to the initial optical frequency.Type: GrantFiled: November 22, 2018Date of Patent: August 29, 2023Assignees: EXAIL, INSTITUT D'OPTIQUE GRADUATE SCHOOL, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, UNIVERSITE DE BORDEAUXInventors: Henri Porte, Baptiste Battelier
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Patent number: 11733028Abstract: A single-laser light source system for cold atom interferometers, comprising: a reference light module including a narrow-bandwidth laser and a frequency stabilization module and an optical frequency shift module including a first electro-optic modulator and a first narrow-bandwidth optical-fiber filter. The first electro-optic modulator is connected to the first narrow-bandwidth optical-fiber filter by an optical fiber, and the first electro-optic modulator is connected to the laser by an optical fiber. The first electro-optic modulator receives an initial light from the laser, modulates the initial light by a modulation signal with a preset frequency, and generates sidebands with the preset frequency. The first narrow-bandwidth optical-fiber filter filters the optical signal at the output of the first electro-optic modulator to obtain a frequency-shifted light as the +1-order sideband.Type: GrantFiled: November 24, 2020Date of Patent: August 22, 2023Assignee: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGYInventors: Jun Yang, Guochao Wang, Shuhua Yan, Lingxiao Zhu, Xiye Guo, Yaning Wang, Aiai Jia, Mengjie Lv, Dongyang Xu, Qixue Li, Mingyue Yang, Jie Wang
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Patent number: 11735886Abstract: Multi-Channels coherent beam combining (CBC) using a mechanism for phase and/or polarization locking that uses a reference optical beam and an array of optical detectors each detector being configured and located to detect overall intensity of an optical interference signal caused by interfering of the reference beam and a beam of the respective channel, where the fast intensity per-channel detection allows simultaneous and quick phase/polarization locking of all channels for improving beam combining system performances.Type: GrantFiled: December 29, 2022Date of Patent: August 22, 2023Assignee: ELBIT SYSTEMS ELECTRO-OPTICS—ELOP LTD.Inventors: Zeev Schiffer, Andrey Nazarov, Daniel Levy
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Patent number: 11728617Abstract: A semiconductor laser device includes: a housing including: a first upper upward-facing surface, a second upper upward-facing surface, a mounting surface, inner lateral surfaces, a first wiring part disposed on the first upper upward-facing surface, and a second wiring part disposed on the second upper upward-facing surface; a submount including: a first main surface fixed to the mounting surface of the housing, and a second main surface opposite to the first main surface; a semiconductor laser element fixed to the second main surface of the submount; a first wire connected to the first wiring part for electrical connection of the semiconductor laser element; and a second wire connected to the second wiring part for electrical connection of the semiconductor laser element.Type: GrantFiled: April 12, 2022Date of Patent: August 15, 2023Assignee: NICHIA CORPORATIONInventor: Hideyuki Fujimoto
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Patent number: 11726341Abstract: A spectral beam combining system includes a plurality of input fibers and a prism having a curved input surface. The plurality of input fibers are attached to the curved input surface. The spectral beam combining system also includes an immersion grating defined on a second surface of the prism, a protective cap disposed over the immersion grating, and an output surface.Type: GrantFiled: January 27, 2021Date of Patent: August 15, 2023Assignee: RAM Photonics Industrial, LLCInventor: John R. Marciante