公开(公告)号：US20240364069A1

公开(公告)日：2024-10-31

申请号：US18685770

申请日：2022-08-19

Applicant: Pasqal

Inventor： Torben Pöpplau ,  Lucas Béguin ,  Arnaud Dumas

IPC: H01S3/067 ,  G06N10/40 ,  H01S3/00 ,  H01S3/16 ,  H01S3/23

CPC classification number: H01S3/0675 ,  G06N10/40 ,  H01S3/0092 ,  H01S3/1608 ,  H01S3/1616 ,  H01S3/1618 ,  H01S3/2391

Abstract: According to a first aspect, the present disclosure relates to a laser apparatus (210) for excitation of Rubidium (Rb) atoms in a quantum processor comprising an Er-doped DFB fiber laser (201) for emitting light at a wavelength of around 1560 nm; at least a first Yb-doped DFB fiber laser (202) for emitting light at a wavelength of around 1090 nm; a fiber-coupled laser source (203) for emitting light at a wavelength of around 1013 nm; a first fiber-coupled SHG device (301) configured to receive said light from said Yb-doped DFB fiber laser (202) and to produce light at a wavelength of around 545 nm; at least a first fiber-coupled DFG device (302) configured to receive a first part of said light from said Er-doped DFB fiber laser (201) and said light from said first fiber-coupled SHG device (301) and produce light at a wavelength of around 840 nm; a second fiber-coupled SHG device (303) configured to receive said light from said first fiber-coupled DFG device (302) and produce light at a wavelength of around 420 nm; a third fiber-coupled SHG device (304) configured to receive a second part of said light from said Er-doped DFB fiber laser (201) and produce light at a wavelength of around 780 nm, wherein said light at wavelength of around 780 nm is configured to produce MOT laser beams (111, 112, 113) for magneto-optical trapping of the Rb atoms and an optical pumping laser beam (120) for optical pumping of the Rb atoms; wherein said light at a wavelength of around 420 nm and said light at a wavelength of around 1013 nm are configured to produce Rydberg laser beams (141, 142) for transition of Rb atoms to Rydberg states.

公开(公告)号：US20240339799A1

公开(公告)日：2024-10-10

申请号：US18748327

申请日：2024-06-20

Applicant: Sichuan Guangsheng IOT Technology Co., Ltd.

Inventor： YUNJIANG RAO ,  BING HAN ,  HAN WU

IPC: H01S3/094 ,  H01S3/16 ,  H01S3/30

CPC classification number: H01S3/094046 ,  H01S3/094065 ,  H01S3/1618 ,  H01S3/302

Abstract: The present invention discloses a narrow-band, low-noise Raman fiber laser with a random fiber laser pump, pertaining to the technical field of fiber lasers and comprising an ytterbium-doped random fiber laser for producing ytterbium-doped random fiber lasing as the pump of a cascaded Raman random laser; the ytterbium-doped random fiber laser consists of a pump light source, a pump combiner, an ytterbium-doped fiber and a single-mode fiber connected in sequence, as well as a first narrow-band reflector connected to the signal end of the pump combiner. Ytterbium-doped random fiber lasing as the pump of the pump light source disclosed in the present invention is produced by an ytterbium-doped random fiber laser consisting of a narrow-band point reflector, an ytterbium-doped fiber, and a single-mode fiber and further serves as the pump of a Raman light source to achieve random laser output. The Raman fiber laser with a random fiber laser pump provided by the present invention is significantly better in time-domain stability and relative intensity noise than conventional Raman fiber lasers owing to the application of ytterbium-doped random fiber lasing with modeless spectrum as the pump.

公开(公告)号：US12080996B2

公开(公告)日：2024-09-03

申请号：US17428712

申请日：2020-02-04

Applicant: SONY GROUP CORPORATION

Inventor： Go Hirano ,  Masanao Kamata

IPC: H01S5/183 ,  B23K26/06 ,  B23K26/0622 ,  G02B19/00 ,  G02F1/35 ,  H01L21/268 ,  H01S3/0941 ,  H01S3/1118 ,  H01S3/16 ,  H01S5/42

CPC classification number: H01S5/18305 ,  B23K26/0622 ,  B23K26/0661 ,  G02B19/0047 ,  G02F1/353 ,  H01L21/268 ,  H01S3/0941 ,  H01S3/1118 ,  H01S3/1618 ,  H01S3/1643 ,  H01S5/423

Abstract: To provide a laser processing machine, a processing method, and a laser light source that are capable of miniaturization. The laser processing machine includes a laser light source and an optical system. The laser light source includes a light emitting body including a substrate and a bottom emission type vertical-cavity surface-emitting laser element that is provided on one surface of the substrate and emits an excitation light beam from another surface side of the substrate, and a cavity that is disposed in contact with the light emitting body on the other surface side of the substrate and oscillates a pulsed laser beam by incidence of the excitation light beam. The optical system causes the pulsed laser beam to contract and applies the pulsed laser beam to a workpiece.

公开(公告)号：US12046867B2

公开(公告)日：2024-07-23

申请号：US17289049

申请日：2019-10-30

Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES ,  UNIVERSITE DE CAEN NORMANDIE ,  ENSICAEN ,  CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE

Inventor： Patrice Camy ,  Alain Braud ,  Jean-Louis Doualan ,  Abdel Benayad ,  Jean-Paul Goossens

IPC: H01S3/16 ,  C09K11/77 ,  C30B29/12 ,  H01S3/23

CPC classification number: H01S3/1698 ,  C09K11/7773 ,  C30B29/12 ,  H01S3/1611 ,  H01S3/1618 ,  H01S3/165 ,  H01S3/2316

Abstract: An active laser medium for emitting a light beam by laser effect includes an X—F2-doped crystal, wherein X is a chemical element from the alkaline-earth family and F is fluorine. The crystal is doped with trivalent ions including: a first category of optically active dopant ions, in which each dopant ion is an ion of a first rare earth; and a second category of optically inactive dopant ions, referred to as buffer ions, in which each dopant ion is an ion of a rare earth different from the first rare earth. The second category of dopant ions has at least ions of a second rare earth and ions of a third rare earth, different from one another. The invention provides an active laser medium that can be used to obtain both a desired emission spectrum shape and a high thermal conductivity.

公开(公告)号：US20240243550A1

公开(公告)日：2024-07-18

申请号：US18559406

申请日：2022-02-15

Applicant: SONY GROUP CORPORATION

Inventor： KENJI TANAKA ,  MASANAO KAMATA

IPC: H01S5/183 ,  H01S3/0941 ,  H01S3/10 ,  H01S3/113 ,  H01S3/16 ,  H01S5/343

CPC classification number: H01S5/18305 ,  H01S3/09415 ,  H01S3/10053 ,  H01S3/10061 ,  H01S3/113 ,  H01S3/1618 ,  H01S3/1643 ,  H01S5/34313

Abstract: Provided is a laser element capable of integrating a plurality of optical elements and inhibiting a standing wave of excitation light or oscillation light. A laser element includes: a laminated semiconductor layer including a first reflection layer and an active layer that performs surface emission at a first wavelength; a laser medium including a second reflection layer on a first surface and a third reflection layer on a second surface; a fourth reflection layer disposed on the rear side of the optical axis with respect to the second surface; a first resonator that causes light of the first wavelength to resonate between the first reflection layer and the third reflection layer; a second resonator that causes light of a second wavelength to resonate between the second reflection layer and the fourth reflection layer; a first polarization conversion element provided between the first reflection layer and the laser medium; a second polarization conversion element provided between the second reflection layer and the laser medium, and at least one of first or second polarization control element provided between the first reflection layer and the fourth reflection layer. The optical axis of the laminated semiconductor layer, an optical axis of the laser medium, and optical axes of the first and second polarization conversion elements and the first or second polarization control element are coaxially arranged.

公开(公告)号：US12027814B2

公开(公告)日：2024-07-02

申请号：US17823569

申请日：2022-08-31

Applicant: National Institutes for Quantum Science and Technology

Inventor： Yutaka Akahane ,  Makoto Aoyama ,  Kanade Ogawa ,  Koichi Yamakawa

IPC: H01S3/094 ,  H01S3/04 ,  H01S3/042 ,  H01S3/06 ,  H01S3/08045 ,  H01S3/0805 ,  H01S3/0941 ,  H01S3/113 ,  H01S3/16 ,  H01S5/00 ,  H01S3/00

CPC classification number: H01S5/005 ,  H01S3/0401 ,  H01S3/0405 ,  H01S3/0627 ,  H01S3/094076 ,  H01S3/09415 ,  H01S3/113 ,  H01S3/1618 ,  H01S3/1643 ,  H01S3/0057 ,  H01S3/0092 ,  H01S3/042 ,  H01S3/08045 ,  H01S3/0805

Abstract: Provided is a laser device in which: a laser medium doped with ytterbium emits light upon absorption of excitation light; the light emitted by the laser medium is amplified to obtain output light; and the output light is outputted in the form of a plurality of pulses. In the laser device, a spatial filter is disposed in the optical path of the light emitted by the laser medium or is disposed in the optical path of the output light outputted from an optical resonator, the spatial filter being configured to filter out a portion of the light or of the output light around the optical axis.

公开(公告)号：US20240178630A1

公开(公告)日：2024-05-30

申请号：US18071880

申请日：2022-11-30

Applicant: Cybel, LLC.

Inventor： Wiktor Tomasz Walasik ,  Jean-Marc Pierre Delavaux ,  Alexandre Amavigan

IPC: H01S3/094 ,  H01S3/00 ,  H01S3/067 ,  H01S3/106 ,  H01S3/16

CPC classification number: H01S3/094011 ,  H01S3/0064 ,  H01S3/06716 ,  H01S3/06733 ,  H01S3/094042 ,  H01S3/106 ,  H01S3/1608 ,  H01S3/161 ,  H01S3/1616 ,  H01S3/1618 ,  H01S2301/02

Abstract: A high-power ASE source in the 2 μm wavelength band is achieved by using a relatively high-power pump beam that is generated within a fiber laser-based pump source. An optical isolator is included along the pump output path and is critical in maximizing the level of output power in the generated ASE, since without its use the ASE source begins to exhibit self-lasing cavity modes at a relatively low power level. Various embodiments of the present invention are based upon the use of a two-stage (or more) arrangement for generating a high-power ASE output, including an ASE-generating stage for establishing the broadband ASE spectrum and an amplifier stage for increasing the optical power within the ASE spectrum. The amplifier stage itself may include one or more individual amplifying elements in a concatenated arrangement. Optical isolators are included along the signal paths to prevent the type of reflections that would otherwise trigger self lasing.

公开(公告)号：US20240162678A1

公开(公告)日：2024-05-16

申请号：US18296143

申请日：2023-04-05

Applicant: APPLIED ENERGETICS, INC.

Inventor： Alan Kost ,  Stephen William McCahon

IPC: H01S3/30 ,  H01S3/067 ,  H01S3/08 ,  H01S3/16 ,  H01S3/23

CPC classification number: H01S3/305 ,  H01S3/08013 ,  H01S3/08054 ,  H01S3/1616 ,  H01S3/1618 ,  H01S3/2316 ,  H01S3/0675 ,  H01S2302/00

Abstract: Mid-Wave Infrared (MWIR) laser systems emits at multiple wavelengths spanning the mid-IR transmission bands with tunability not to coincide with absorption lines within the bands. Optical fiber-based pump sources and a series of Raman fiber wavelength shifting amplifiers create a single output aperture that contains multiple spectral lines within each MWIR sub-band.

公开(公告)号：US11901690B2

公开(公告)日：2024-02-13

申请号：US17416873

申请日：2020-02-21

Applicant: Fujikura Ltd.

Inventor： Yasuo Nakanishi ,  Yasuhiro Mashiko ,  Shinichi Sakamoto ,  Kensuke Shima

IPC: H01S3/067 ,  H01S3/16 ,  H01S3/00

CPC classification number: H01S3/0675 ,  H01S3/0078 ,  H01S3/06716 ,  H01S3/1618

Abstract: A fiber laser device includes a pumping light source, an amplifying fiber, an input side fiber fusion-spliced on an input side of the amplifying fiber and formed with a HR-FBG, an output side fiber fusion-spliced on an output side of the amplifying fiber and formed with an OC-FBG having a reflectivity smaller than that of the HR-FBG, an output end, and a mode filter, wherein the input side fiber or an intermediate fiber disposed between the amplifying fiber and the input side fiber is fusion-spliced with the amplifying fiber via a fusion splice portion, and at least a portion of the mode filter is disposed in a region between the fusion splice portion and a position separated from the fusion splice portion by a coherence length of beating caused by mode interference of signal light propagating in the amplifying fiber.

公开(公告)号：US11656402B2

公开(公告)日：2023-05-23

申请号：US16958332

申请日：2018-12-27

Applicant: Fujikura Ltd.

Inventor： Rintaro Kitahara ,  Tatsuya Kishi

IPC: G02B6/02 ,  G02B6/036 ,  H01S3/067 ,  H01S3/16

CPC classification number: G02B6/02047 ,  G02B6/03616 ,  G02B6/02023 ,  H01S3/06733 ,  H01S3/06762 ,  H01S3/1618

Abstract: An optical fiber includes a core that propagates a light that includes a wavelength equal to or larger than 1000 nm and equal to or smaller than 1100 nm. The light propagates in the core at least in an LP01 mode and an LP11 mode. A difference between a propagation constant of the light in the LP01 mode and a propagation constant of the light in the LP11 mode is 1735 rad/m or larger and 4000 rad/m or smaller.