Patents Examined by Michael Carter
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Patent number: 12224548Abstract: A single-photon Raman optical frequency comb source is provided, including: a light source assembly, a filtering mechanism, at least three electro-optical modulators, a wavelength division multiplexer and a single photon generating mechanism. The light source assembly is configured to generate a Raman scattering light. The filtering mechanism is configured to pass a light having a specific wavelength, to filter the Raman scattering light and obtain at least three Raman scattering spectral lines. Each electro-optical modulator is configured to modulate a frequency of one of the Raman scattering spectrum lines in one-to-one correspondence, so as to cause a frequency shift of the Raman scattering spectrum line. The wavelength division multiplexer is configured to multiplex all modulated Raman scattering spectral lines and output a Raman optical frequency comb. The single photon generating mechanism is configured to adjust the Raman optical frequency comb to obtain a single-photon Raman optical frequency comb.Type: GrantFiled: April 21, 2023Date of Patent: February 11, 2025Assignee: UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINAInventors: Chong Wang, Haocheng Yang, Xianghui Xue, Yudie Li, Tingdi Chen
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Patent number: 12212112Abstract: A dual optical frequency comb light-emitting device includes a first optical-frequency-comb laser source that includes a first laser resonator having a first optical path length, a second optical-frequency-comb laser source that includes a second laser resonator having a second optical path length different from the first optical path length, and an optical coupler that causes a first portion of first optical-frequency-comb laser light emitted from the first laser resonator to enter the second laser resonator. The first optical-frequency-comb laser source outputs a second portion of the first optical-frequency-comb laser light to an outside. The second optical-frequency-comb laser source outputs second optical-frequency-comb laser light emitted from the second laser resonator to the outside.Type: GrantFiled: December 9, 2021Date of Patent: January 28, 2025Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Tasuku Nakamura, Yasuhisa Inada
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Patent number: 12212113Abstract: Gaseous laser systems and related techniques are disclosed. Techniques disclosed herein may be utilized, in accordance with some embodiments, in providing a gaseous laser system with a configuration that provides (A) pump illumination with distinct edge surfaces for an extended depth and (B) an output beam illumination from a resonator cavity with distinct edges in its reflectivity profile, thereby providing (C) pump beam and resonator beam illumination on a volume so that the distinct edge surfaces of its pump and resonator beam illumination are shared-edge surfaces with (D) further edge surfaces of the amplifier volume at the surfaces illuminated directly by the pump or resonator beams, as defined by optical windows and (optionally) by one or more flowing gas curtains depleted of the alkali vapor flowing along those optical windows. Techniques disclosed herein may be implemented, for example, in a diode-pumped alkali laser (DPAL) system, in accordance with some embodiments.Type: GrantFiled: December 26, 2023Date of Patent: January 28, 2025Assignee: XEMED LLCInventor: F. William Hersman
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Patent number: 12212117Abstract: A laser device based on silicon photonics with in-cavity power monitor includes a gain chip, a reflector, and a photodiode. The gain chip is mounted on a silicon photonics substrate and is configured to emit light from an active region bounded between a frontend facet and a backend facet. The reflector is configured to reflect the light in a cavity formed between the reflector and the frontend facet through which a laser light is output. The photodiode is coupled to one or more waveguides in the cavity by a splitter disposed directly in an optical path between the reflector and a component positioned in the cavity. The photodiode is configured to measure power of light propagating through the cavity between the reflector and the component.Type: GrantFiled: October 27, 2023Date of Patent: January 28, 2025Assignee: MARVELL ASIA PTE LTDInventors: Xiaoguang He, Radhakrishnan L. Nagarajan
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Patent number: 12212114Abstract: A method of generating an optical pulse train using spectral extension by optical phase modulation, spectral narrowing by optical phase demodulation, and narrow linewidth optical filtering is disclosed. It is also described that the wavelength selection of light using a chromatic dispersion element between the optical phase modulator can enrich the method. Systems include an in-line optical setup and a ring-type laser cavity for mode-locked laser outputs. The duration with which the electrical signals driving the modulators are opposed determines the line width of the optical pulses, and the opposite repetition of the electrical signals defines the rate of repetition of an optical pulse train generated. Four different arrangements of electrical signals in the time domain or phase domain make it possible to control the generation of optical pulses and the wavelength selection of the light. (i) A signal arrangement comprising sinusoidal electrical signals with a slight frequency difference.Type: GrantFiled: January 28, 2021Date of Patent: January 28, 2025Assignee: IZMIR BIYOTIP VE GENOM MERKEZIInventors: Serhat Tozburun, Ibrahim Akkaya
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Patent number: 12206221Abstract: A device comprises three elements, realized as photonic integrated circuits. The first element comprises a tunable semiconductor laser emitting light at a laser output wavelength. The second element comprises a wavelength selective element, coupled to the first element. The third element comprises N photodetectors where N>=2, coupled to the second element. Light coupled into the second element from the first element is de-multiplexed by the wavelength selective element such that a ratio of light power coupled from the second element into one of the N photodetectors to light power coupled from the second element into another one of the N photodetectors is a function of the laser output wavelength. The responses of the N photodetectors facilitate at least one of measurement and control of the laser output wavelength.Type: GrantFiled: September 8, 2021Date of Patent: January 21, 2025Assignee: Nexus Photonics IncInventors: Minh Tran, Tin Komljenovic
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Patent number: 12199398Abstract: Methods, circuits, and techniques for reflection cancellation. Laser output is tapped. A tapped portion of the laser output is phase shifted to generate a feedback signal, with the feedback signal being out-of-phase with a parasitic reflection of the laser output. The feedback signal is directed towards the laser such that the parasitic reflection and feedback signal are superpositioned before entering the laser. A magnitude and a phase of the feedback signal are such that superposition of the feedback signal and the parasitic reflection results in a resulting signal of lower magnitude than the parasitic reflection alone. During laser operation, a magnitude of the resulting signal is monitored and, as the parasitic reflection varies, the magnitude of the resulting signal is adjusted by adjusting at least one of the magnitude and the phase of the feedback signal in response to the monitoring of the resulting signal.Type: GrantFiled: June 18, 2021Date of Patent: January 14, 2025Assignee: The University of British ColumbiaInventors: Lukas Chrostowski, Nicolas A. F. Jaeger, Sudip Shekhar, Hasitha Jayatilleka, Hossam A. S. Shoman
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Patent number: 12191633Abstract: An optical integrated light source includes a plurality of topological ring resonators. Each of the topological ring resonators is defined by an interface between two distinct periodic structures having different topological invariants such that a one-way edge mode may be excited along the interface. A magnetic material is arranged to interact with the plurality of topological ring resonators such that the optical integrated light source is structured and configured to generate plural beams each carrying large orbital angular momentum.Type: GrantFiled: March 25, 2020Date of Patent: January 7, 2025Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Boubacar Kante, Babak Bahari
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Patent number: 12191634Abstract: A semiconductor laser element includes: a first conductivity-type cladding layer; a first guide layer disposed above the first conductivity-type cladding layer; an active layer disposed above the first guide layer; and a second conductivity-type cladding layer disposed above the active layer. A window region is formed in a region of the active layer including part of at least one of the front-side end face or the rear-side end face, the first conductivity-type cladding layer consists of (AlxGa1-x)0.5In0.5P, the first guide layer consists of (AlyGa1-y)0.5In0.5P, and the second conductivity-type cladding layer consists of (AlzGa1-z)0.5In0.5P, where x, y, and z each denote an Al composition ratio, 0<x?y<z?y is satisfied, and D/L>0.03 is satisfied, where L denotes a length of the resonator and D denotes a length of the window region in the first direction.Type: GrantFiled: September 28, 2021Date of Patent: January 7, 2025Assignee: NUVOTON TECHNOLOGY CORPORATION JAPANInventors: Kazuya Yamada, Tougo Nakatani, Hiroki Nagai, Masayuki Hata
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Patent number: 12174370Abstract: A synthesized grating is provided comprising a substrate/layer, and a plurality of alternating aperiodic non-uniform low and high index profiles on a surface of the substrate/layer defining a transmission/reflection spectrum for one of either single or multi-frequency operation of said grating in an optical cavity. A method is also provided for designing the synthesized grating, comprising determining a grating structure of given profiles through analysis of an optimized weighted sum and mapping the grating profile to said surface with the plurality of alternating non-uniform low and high index profiles.Type: GrantFiled: April 30, 2020Date of Patent: December 24, 2024Assignee: NATIONAL RESEARCH COUNCIL OF CANADAInventors: Mohamed Rahim, Greg Pakulski, Philip Poole, Zhenguo Lu
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Patent number: 12163773Abstract: A fiber optic voltage conditioner, and method therefor, generally relate to voltage conditioning. In such a fiber optic voltage conditioner, there is a laser, and an optical circulator is coupled to receive a light signal from the laser. A controller is coupled to the laser and is configured to generate first control information for wavelength-drift control of the laser. A data acquisition module is coupled to the controller and is configured to generate second control information for the controller for adjustment of the first control information. A photodetector is coupled to the optical circulator to receive a returned optical signal and is coupled to the data acquisition module to provide an analog output signal thereto. The photodetector is configured to generate the analog output signal responsive to the returned optical signal. The data acquisition module is configured to generate the second control information using the analog output signal.Type: GrantFiled: July 1, 2022Date of Patent: December 10, 2024Assignee: iSenseCloud, Inc.Inventors: An-Dien Nguyen, An H. Nguyen
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Patent number: 12155169Abstract: An apparatus includes a light source operable to produce light having a wavelength, an optical component disposed over the light source so as to intersect a path of light produced by the light source, and at least one electrically conductive trace on a surface of the optical component. A drive controller is operable to regulate optical output power of the light source. The at least one electrically conductive trace is coupled electrically to the drive controller, which is operable to monitor an electrical characteristic of the at least one electrically conductive trace, and to reduce the optical output power of the light source if a value of the electrical characteristic is indicative of a possible eye-safety hazard.Type: GrantFiled: December 9, 2019Date of Patent: November 26, 2024Assignee: AMS SENSORS ASIA PTE. LTD.Inventors: Laurence Watkins, Maik Scheller, Baiming Guo, Qing Wang, Peng Gao
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Patent number: 12155176Abstract: A two-dimensional photonic-crystal surface-emitting laser includes an active layer; and a photonic-crystal layer including a two-dimensional photonic-crystal light-amplification portion that is a first two-dimensional photonic-crystal region provided in a plate-shaped base body disposed on one side of the active layer, and includes an amplification-portion photonic band gap which is a photonic band gap formed between two photonic bands having a band edge at a predetermined point in a reciprocal lattice space, and a two-dimensional photonic-crystal light-reflection portion that is a second two-dimensional photonic-crystal region provided around the two-dimensional photonic-crystal light-amplification portion, and includes a reflection-portion photonic band gap which is a photonic band gap formed between two photonic bands having a band edge at the predetermined point of the reciprocal lattice space, wherein energy ranges of the amplification-portion photonic band gap and the reflection-portion photonic band gaType: GrantFiled: February 4, 2020Date of Patent: November 26, 2024Assignee: KYOTO UNIVERSITYInventors: Susumu Noda, Takuya Inoue, Masahiro Yoshida, Menaka De Zoysa
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Patent number: 12155173Abstract: A combined multi-wavelength laser with a laser module, a power supply module, and a communication module is disclosed. The power supply module is used to power the laser module and the communication module and includes a power supply controller, a power supply bus, and an independent power source connector. The power supply controller is connected to the independent power source connector via the power supply bus. The communication module includes a communication controller, a communication bus, and an independent communication connector. The communication controller is connected to the independent communication connector through the communication bus.Type: GrantFiled: September 7, 2021Date of Patent: November 26, 2024Inventor: Hua Shang
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Patent number: 12142891Abstract: In a surface emitting laser package, a surface emitting laser element and a substrate may be electrically connected through a diffusion part. In detail, according to the surface emitting laser package, a housing includes a step, the diffusion part is disposed at the step of the housing, and the surface emitting laser element and the substrate may be electrically connected through a connection wiring extending through the housing to correspond to the step and a conductive line disposed at one side of the diffusion part.Type: GrantFiled: May 2, 2019Date of Patent: November 12, 2024Assignee: SUZHOU LEKIN SEMICONDUCTOR CO., LTD.Inventors: Myung Sub Kim, Woo Jin Moon, Ju Young Park
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Patent number: 12126143Abstract: Methods for fabricating ultraviolet laser diode devices include providing substrate members comprising gallium and nitrogen or aluminum and nitrogen, forming an epitaxial material overlying a surface region of the substrate members, patterning the epitaxial material to form epitaxial mesa regions, depositing a bond media on at least one of the epitaxial mesa regions, bonding the bond media on at least one of the epitaxial mesa regions to a handle substrate, subjecting the sacrificial layer to an energy source to initiate release of the substrate member and transfer the at least one of the epitaxial mesa regions to the handle substrate, and processing the at least one of the epitaxial mesa regions to form the ultraviolet laser diode device.Type: GrantFiled: May 14, 2021Date of Patent: October 22, 2024Assignee: KYOCERA SLD Laser, Inc.Inventors: Melvin McLaurin, James W. Raring
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Patent number: 12126142Abstract: A nitride semiconductor laser device of one embodiment of the present disclosure includes a single-crystal substrate, a base layer, a sheet-shaped structure, a light emitting layer, and a resonator mirror. The single-crystal substrate extends in one direction. The base layer is provided on the single-crystal substrate and includes a nitride semiconductor. The sheet-shaped structure is provided on the base layer to stand in a direction perpendicular to the base layer. The sheet-shaped structure has an area of a side surface that is greater than an area of an upper surface. The side surface extends in a longitudinal direction of the single-crystal substrate. The sheet-shaped structure includes a nitride semiconductor. The light emitting layer is provided at least on the side surface of the sheet-shaped structure. The light emitting layer includes a nitride semiconductor. The resonator mirror is provided by a pair of end surfaces of the sheet-shaped structure that oppose each other in the longitudinal direction.Type: GrantFiled: October 25, 2019Date of Patent: October 22, 2024Assignees: SONY GROUP CORPORATION, SONY SEMICONDUCTOR SOLUTIONS CORPORATIONInventors: Takashi Tange, Kunihiko Tasai, Kota Tokuda
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Patent number: 12119611Abstract: A semiconductor laser apparatus includes: a semiconductor laser device for junction down mounting that includes a first light-emitting device region and a second light-emitting device region formed separately on a substrate. The first light-emitting device region and the second light-emitting device region in the semiconductor laser device each have a stack structure in which an n-type semiconductor layer, an active layer, and a p-type semiconductor layer are stacked in stated order. The first light-emitting device region includes a first electrode film located on the n-type semiconductor layer. The second light-emitting device region includes a second electrode film located on the p-type semiconductor layer. The first electrode film and the second electrode film are electrically connected to each other.Type: GrantFiled: August 23, 2021Date of Patent: October 15, 2024Assignee: NUVOTON TECHNOLOGY CORPORATION JAPANInventors: Masayuki Ono, Katsuya Samonji, Tohru Nishikawa, Hiroshi Asaka, Mitsuru Nishitsuji, Kazuya Yamada
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Patent number: 12107379Abstract: A laser device includes at least one light source; a delivery fiber that is configured to propagate of laser light emitted from the light source; and a first light detection unit and a second light detection unit configured to detect a part of light propagating in a direction opposite to a propagation direction of the laser light through the delivery fiber. The first light detection unit detects first light included in a wavelength band of visible light. The second light detection unit detects second light included in a wavelength band of near-infrared light.Type: GrantFiled: February 27, 2020Date of Patent: October 1, 2024Assignee: Fujikura Ltd.Inventors: Shinichi Sakamoto, Yasuto Chiba, Wataru Kiyoyama, Yutaka Yamaguchi, Takashi Hasunuma
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Patent number: 12095228Abstract: A laser comprising a laser cavity formed by a first optical reflector, a gain region, a second optical reflector having a plurality of reflection peaks, and at least one optically active region. The first mirror may be a DBR or comb mirror and the second mirror may be a comb mirror. The spectral reflectance of the second optical reflector is adjusted at least partially based on an electric signal received form the optically active region such that only one reflection peak is aligned with a cavity mode formed by the first and second reflector.Type: GrantFiled: June 19, 2023Date of Patent: September 17, 2024Assignee: Freedom Photonics LLCInventor: Gordon Barbour Morrison