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公开(公告)号：US20220010753A1
公开(公告)日：2022-01-13
申请号：US17485567
申请日：2021-09-27
Applicant: IHI CORPORATION , IHI AEROSPACE Co., Ltd. , INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL SCIENCES
Inventor： Takahisa NAGAO , Mitsunori ITOU , Jun IZAWA , Yoshiki MATSUURA , Masahiro SASAKI , Takunori TAIRA
Abstract: A laser ignition device includes an excitation light source that generates excitation light, and a pulsed laser oscillator connected to the excitation light source, wherein the pulsed laser oscillator generates a plurality of pulsed light beams at a time of one ignition to produce an initial flame.
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公开(公告)号：US20210296840A1
公开(公告)日：2021-09-23
申请号：US17050433
申请日：2019-04-24
Applicant: National University Corporation Kitami Institute of Technology , Inter-University Research Institute Corporation National Institutes of Natural Sciences
Inventor： Hiroaki FURUSE , Yuki KOIKE , Ryo YASUHARA
Abstract: A joined body (10) includes an optical material (11) and a cooling material (12) that are capable of transmitting light and are joined together. At a joining interface between the optical material (11) and the cooling material (12), the joined body (10) is capable of transmitting light, and also an atom contained in the optical material (11) diffusively enters the cooling material (12) in such a degree that an interference fringe is not generated in the joined body (10). A diffusive entry length of an atom contained in the optical material (11) into the cooling material (12) may be in a range from approximately 1.0 nm to approximately 10 μm.
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公开(公告)号：US10254538B2
公开(公告)日：2019-04-09
申请号：US15023281
申请日：2014-09-19
Inventor： Masayuki Hattori , Yosuke Tamada , Takashi Murata , Yasuhiro Kamei , Mitsuyasu Hasebe , Yutaka Hayano , Shin Oya
IPC: G02B27/14 , G02B27/00 , G02B21/06 , G02B21/00 , G01J9/00 , G02B17/00 , G02B21/02 , G02B21/18 , G02B21/36 , G01N21/64 , G01N21/17 , A61B5/00
Abstract: The present invention is intended to provide an adaptive optics system and an optical device that allow correction of wavefront phase aberration with higher accuracy than before and have a wider correction range than the conventional ones, regardless of the distance between the observation target and the fluctuation layer, and the size of the observation target. An adaptive optics system includes: a wavefront phase modulator that makes aberration correction to incident light and emits the corrected light; and an imaging-conjugated position adjustment mechanism that adjusts freely within a specimen the position of a surface imaging-conjugated with a fluctuation correction surface formed by the wavefront phase modulator. The imaging-conjugated position adjustment mechanism adjusts the fluctuation correction surface to be imaging-conjugated with a fluctuation layer existing in the specimen.
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公开(公告)号：US20180356598A1
公开(公告)日：2018-12-13
申请号：US16001951
申请日：2018-06-07
Applicant: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION, NATIONAL INSTITUTES OF NATURAL SCIENCES , NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY
Inventor： Hitoshi KIUCHI , Atsushi KANNO , Tetsuya KAWANISHI
CPC classification number: G02B6/3586 , G01L1/246 , H04B10/12 , H04B10/506 , H04J14/02 , H04Q11/0001
Abstract: To provide a method for performing phase control of coherent two light wave signals while maintaining coherence in the state of the light signal, and a device which realizes such a method, there is provided, as illustrated in FIG. 1, a phase adjustment device 1 for two light waves including: a two light wave source 3, a wavelength separator 5, a first phase modulator 7, and a second phase modulator 9, whereby coherent two light waves are used as input signals to perform wavelength separation of those input signals thereafter to control optical phases of the respective light signals thereafter to multiplex them by using a multiplexer 11, thus to be able to obtain an output signal of which optical phase has been adjusted.
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公开(公告)号：US20170358898A1
公开(公告)日：2017-12-14
申请号：US15609932
申请日：2017-05-31
Inventor： Takunori TAIRA , Arvydas KAUSAS , Lihe ZHENG , Vincent YAHIA , Ryo YASUHARA
CPC classification number: H01S3/0405 , H01S3/042 , H01S3/0604 , H01S3/0621 , H01S3/0627 , H01S3/07 , H01S3/08054 , H01S3/08059 , H01S3/094038 , H01S3/094084 , H01S3/113 , H01S3/1611 , H01S3/1643 , H01S3/2316
Abstract: A technique which is suitable in joining an end surface of a laser medium to a transparent heat sink for maintaining thermal resistance therebetween low and avoiding large thermal stress from acting on the laser medium is to be provided. An end coat is provided on the end surface of the laser medium, a same-material layer constituted of a same material as the heat sink is provided on a surface of the end coat, a surface of the same-material layer and an end surface of the heat sink are activated in a substantially vacuum environment, and those activated surfaces are bonded in the substantially vacuum environment. A laser apparatus having low thermal resistance between the laser medium and the heat sink and high transparency at a joint interface therebetween, and no large thermal stress acting on the laser medium is thereby obtained.
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Patent Agency Ranking
公开(公告)号：US20170325961A1
公开(公告)日：2017-11-16
申请号：US15529939
申请日：2015-11-27
Inventor： Takunori TAIRA , Yoichi SATO , Junichi NABEKURA , Hiroaki WAKE
Abstract: A translucent in-vivo indwelling device with a translucent region including a rare earth doped fluorapatite.
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公开(公告)号：US09203210B2
公开(公告)日：2015-12-01
申请号：US14523102
申请日：2014-10-24
Inventor： Takunori Taira , Rakesh Bhandari
CPC classification number: H01S3/11 , H01S3/0092 , H01S3/061 , H01S3/0612 , H01S3/0627 , H01S3/09 , H01S3/091 , H01S3/094076 , H01S3/113 , H01S3/14 , H01S3/16 , H01S3/1603 , H01S3/1611 , H01S3/1643
Abstract: When an excitation light is entered in a laser medium including a doped (containing rare earth element) YAG, the vicinity of the excitation light entry face is locally heated which generates a birefringence, causing degradation of linear polarization of emitted laser. To avoid such a phenomenon, it was necessary to make the excitation light pulsed and slow down the repetition rate of the pulse. In this device, an undoped YAG is bonded to a excitation light entry face of the laser medium made of a doped YAG. By arranging the YAG axis so as to extend along the optical axis of the laser oscillation system, a linearly polarized pulse laser can be obtained.
Abstract translation: 当在包括掺杂（含有稀土元素）YAG的激光介质中进入激发光时，激发光入射面的附近局部加热，产生双折射，导致发射激光器的线偏振的劣化。 为了避免这种现象，有必要使激发光脉冲，并减慢脉冲的重复频率。 在该器件中，未掺杂的YAG结合到由掺杂的YAG制成的激光介质的激发光入射面。 通过沿着激光振荡系统的光轴布置YAG <100'轴线，可以获得线偏振脉冲激光器。
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公开(公告)号：US20150010028A1
公开(公告)日：2015-01-08
申请号：US14374978
申请日：2012-09-19
Applicant: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL SCIENCES , OXIDE CORPORATION
Inventor： Takunori Taira , Rakesh Bhandari , Yasunori Furukawa , Akio Miyamoto , Masayuki Habu , Tsuyoshi Tago
CPC classification number: H01S3/109 , G02F1/3551 , G02F1/37 , G02F2001/3503 , G02F2001/3507 , G02F2001/354 , H01S3/02
Abstract: Provided is an external resonance-type laser device with high wavelength conversion efficiency in which a nonlinear optical crystal is disposed outside of a resonator. The laser device includes a laser generation device configured to generate high-intensity laser light, a nonlinear optical crystal on which the high-intensity laser light generated by the laser generation device is incident and which is configured to generate a second harmonic wave light, and a different-element-fluxless-grown nonlinear optical crystal on which the second harmonic wave light generated by the nonlinear optical crystal is incident and which is configured to generate a fourth harmonic wave light. In the laser device, the different-element-fluxless-grown nonlinear optical crystal is not damaged even when high-intensity laser light of 100 MW/cm2 or more is incident.
Abstract translation: 提供一种非线性光学晶体设置在谐振器外部的具有高波长转换效率的外部谐振型激光器件。 激光装置包括：激光产生装置，其被配置为产生高强度激光;非线性光学晶体，其上由激光产生装置产生的高强度激光入射并且被配置为产生二次谐波光;以及 由非线性光学晶体产生的二次谐波入射并被配置为产生四次谐波光的不同元件无通量生长的非线性光学晶体。 在激光装置中，即使入射了100MW / cm 2以上的高强度激光，也不会损坏不同元件无助熔生长的非线性光学晶体。
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公开(公告)号：US12142888B2
公开(公告)日：2024-11-12
申请号：US17050433
申请日：2019-04-24
Applicant: National University Corporation Kitami Institute of Technology , Inter-University Research Institute Corporation National Institutes of Natural Sciences
Inventor： Hiroaki Furuse , Yuki Koike , Ryo Yasuhara
Abstract: A joined body (10) includes an optical material (11) and a cooling material (12) that are capable of transmitting light and are joined together. At a joining interface between the optical material (11) and the cooling material (12), the joined body (10) is capable of transmitting light, and also an atom contained in the optical material (11) diffusively enters the cooling material (12) in such a degree that an interference fringe is not generated in the joined body (10). A diffusive entry length of an atom contained in the optical material (11) into the cooling material (12) may be in a range from approximately 1.0 nm to approximately 10 μm.
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公开(公告)号：US20230378713A1
公开(公告)日：2023-11-23
申请号：US18363602
申请日：2023-08-01
Applicant: Gigaphoton Inc. , Inter-University Research Institute Corporation, National Institutes of Natural Sciences
Inventor： Yuki TAMARU , Taisuke MIURA , Ryo YASUHARA
CPC classification number: H01S3/10061 , H01S3/0064 , H01S3/2251 , H01S3/2256 , H01S3/0071 , H01S3/0014 , H01S3/2325 , G03F7/70025 , G03F7/70191
Abstract: An ultraviolet laser apparatus includes an oscillation-stage laser, an amplifier that amplifies the pulse laser light, and an optical isolator. The optical isolator includes a first Faraday rotator that rotates the polarization direction of the pulse laser light output from the oscillation-stage laser by a first angle in a first rotation direction, a first polarizer so disposed to transmit the pulse laser light that exits out of the first Faraday rotator at normalized transmittance greater than or equal to 0.9, a second Faraday rotator that rotates the polarization direction of the pulse laser light passing through the first polarizer by a second angle in the opposite direction to the first rotation direction, and a second polarizer so disposed to transmit the pulse laser light that exits out of the second Faraday rotator at the normalized transmittance greater than or equal to 0.9.
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