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公开(公告)号：US20230318255A1
公开(公告)日：2023-10-05
申请号：US18124658
申请日：2023-03-22
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Shohei HAYASHI , Kazuue FUJITA , Akio ITO , Atsushi NAKANISHI
IPC: H01S5/02253 , H01S5/02216 , H01S5/34 , H01S5/02315 , H01S5/14 , H01S5/06
CPC classification number: H01S5/02253 , H01S5/02216 , H01S5/3402 , H01S5/02315 , H01S5/141 , H01S5/0607 , H01S2302/02
Abstract: The laser module includes a QCL element and a support member. The QCL element has a first end surface located on a first side in a second direction orthogonal to a stacking direction and a second end surface located on a second side opposite to the first side in the second direction. The substrate has first to fourth substrate-surfaces. The support member has a first portion having a first surface facing at least a portion of the fourth substrate-surface, and a second portion having a second surface facing at least a portion of the first substrate-surface and a third surface located opposite to the second surface in the second direction. At least a part of the terahertz wave generated in the active layer is incident on the second surface of the support member through the substrate and is emitted from the third surface through the inside of the second portion.
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公开(公告)号：US20230307562A1
公开(公告)日：2023-09-28
申请号：US18023418
申请日：2021-05-26
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Tatsuo DOUGAKIUCHI , Akio ITO , Masahiro HITAKA , Tadataka EDAMURA
IPC: H01L31/0352 , G01J3/45 , G01J3/457 , G01J3/10 , H01L23/482 , H01L31/02 , H01L31/0232 , H01L31/0304
CPC classification number: H01L31/035236 , G01J3/45 , G01J3/457 , G01J3/10 , H01L23/4821 , H01L31/02005 , H01L31/02325 , H01L31/035281 , H01L31/03046 , G01J2003/102
Abstract: A photodetector includes: a semiconductor substrate; a mesa portion formed on a major surface of the semiconductor substrate to extend along an optical waveguide direction; a first contact layer; a second contact layer; a first electrode; and an air bridge wiring electrically connected to the first contact layer and the first electrode. When viewed in a direction perpendicular to the major surface of the semiconductor substrate, a length of the mesa portion in the optical waveguide direction is longer than a length of the mesa portion in a direction perpendicular to the optical waveguide direction. The air bridge wiring is led out from the first contact layer to one side in the direction perpendicular to the optical waveguide direction, and is bridged between the first contact layer and the first electrode.
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公开(公告)号：US20230198224A1
公开(公告)日：2023-06-22
申请号：US17925089
申请日：2021-05-27
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Yoshitaka KUROSAKA , Kazuyoshi HIROSE , Yuu TAKIGUCHI , Akio ITO , Tadataka EDAMURA , Takahiko YAMANAKA , Shigeo HARA
CPC classification number: H01S5/026 , H01S5/34313 , H01S5/34353 , H01S5/11 , H01S5/04254 , H01S5/423 , H01S5/18308 , H01S2304/04
Abstract: An optical device of one embodiment outputs light in a short-wavelength range such as a visible range. The optical device includes a UC layer, first and second light-confinement layers, and a resonance mode forming layer. The UC layer contains an upconversion material receiving excitation light in a first wavelength range and outputting light in a second wavelength range. The first light-confinement layer has a characteristic of reflecting part of the second wavelength-range light. The second light-confinement layer has a characteristic of reflecting part of the second wavelength-range light and transmitting the remainder, and is disposed such that the UC layer locates between the first and second light-confinement layers. The resonance mode forming layer locates between the UC layer and the first or second light-confinement layer, includes a base layer and plural modified refractive index regions, and forms a resonance mode of the second wavelength-range light.
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公开(公告)号：US20220311215A1
公开(公告)日：2022-09-29
申请号：US17701899
申请日：2022-03-23
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Akio ITO , Kazuue FUJITA , Shohei HAYASHI , Tatsuo DOUGAKIUCHI
Abstract: A quantum cascade laser includes a semiconductor substrate, an optical waveguide formed on a first surface of the semiconductor substrate, and a temperature adjusting member. The optical waveguide includes a first region and a second region located on one side with respect to the first region in the optical waveguide direction of the optical waveguide. The first region generates a first light having a first wavelength, and the second region generates a second light having a second wavelength. The optical waveguide generates an output light having a frequency corresponding to a difference between the first wavelength and the second wavelength by difference-frequency generation. A recess for suppressing heat transfer between the first region and the second region is formed at a second surface of the semiconductor substrate. The temperature adjusting member includes a first temperature adjusting member for adjusting the temperature of the second region.
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5.发明申请公开(公告)号：US20210057875A1
公开(公告)日：2021-02-25
申请号：US16985916
申请日：2020-08-05
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Atsushi SUGIYAMA , Akio ITO , Tadataka EDAMURA
Abstract: A sintered body of the present invention includes cerium oxide and cerium fluoride or yttrium fluoride.
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Patent Agency Ranking
公开(公告)号：US20190011361A1
公开(公告)日：2019-01-10
申请号：US16021055
申请日：2018-06-28
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Tatsuo DOUGAKIUCHI , Akio ITO , Kazuue FUJITA , Tadataka EDAMURA
CPC classification number: G01N21/39 , G01N2021/391 , G01N2021/451 , H01L31/035236 , H01S5/0028 , H01S5/0203 , H01S5/0208 , H01S5/0264 , H01S5/0656 , H01S5/10 , H01S5/12 , H01S5/141 , H01S5/143 , H01S5/2027 , H01S5/22 , H01S5/3401 , H01S5/34313
Abstract: A fluid analyzer includes a substrate, a quantum cascade laser formed on a surface of the substrate and including a first light-emitting surface and a second light-emitting surface facing each other in a predetermined direction parallel to the surface, a quantum cascade detector formed on the surface and including the same layer structure as the quantum cascade laser and a light incident surface facing the second light-emitting surface in the predetermined direction, and an optical element disposed on an optical path of light emitted from the first light-emitting surface across an inspection region in which a fluid to be analyzed is to be disposed and reflecting the light to feed the light back to the first light-emitting surface.
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公开(公告)号：US20170115213A1
公开(公告)日：2017-04-27
申请号：US15294882
申请日：2016-10-17
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Akio ITO , Tatsuo DOUGAKIUCHI , Tadataka EDAMURA
CPC classification number: G01N21/39 , G01N2021/399 , H01S5/0264 , H01S5/22 , H01S5/3401 , H01S2301/176
Abstract: A fluid analyzer includes a substrate, a quantum cascade laser formed on a surface of the substrate and including a first light-emitting surface and a second light-emitting surface facing each other, a first quantum cascade detector formed on the surface and including the same layer structure as the quantum cascade laser and a first light incident surface facing the first light-emitting surface, a second quantum cascade detector formed on the surface and including the same layer structure as the quantum cascade laser and a second light incident surface facing the second light-emitting surface, and a resin member covering at least the second light-emitting surface and the second light incident surface and having optical transparency and an electrical insulation property. A first space in which a fluid to be analyzed is disposed is provided in a first area between the first light-emitting surface and the first light incident surface.
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公开(公告)号：US20170063038A1
公开(公告)日：2017-03-02
申请号：US15253382
申请日：2016-08-31
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Akio ITO , Tatsuo DOUGAKIUCHI , Kazuue FUJITA , Tadataka EDAMURA
CPC classification number: H01S5/142 , H01S5/0207 , H01S5/0604 , H01S5/1092 , H01S5/12 , H01S5/24 , H01S5/3402 , H01S2302/02
Abstract: A quantum cascade laser is configured with a semiconductor substrate, and an active layer having a multistage lamination of emission layers and injection layers. The active layer is configured to be capable of generating first pump light of a frequency ω1 and second pump light of a frequency ω2, and to generate output light of a difference frequency ω by difference frequency generation. An external diffraction grating is provided for generating the first pump light, outside an element structure portion including the active layer, and an internal diffraction grating is provided for generating the second pump light, inside the element structure portion. The frequency ω2 is set to be fixed to a frequency not coincident with a gain peak, and the frequency ω1 is set to be variable to a frequency different from the frequency ω2.
Abstract translation: 量子级联激光器配置有半导体衬底，以及具有发射层和注入层的多级叠层的有源层。 有源层被配置为能够产生频率ω1的第一泵浦光和频率ω2的第二泵浦光，并且通过差频产生产生差频ω的输出光。 提供外部衍射光栅，用于在包括有源层的元件结构部分外部产生第一泵浦光，并且在元件结构部分内部设置内部衍射光栅以产生第二泵浦光。 频率ω2被设定为固定为与增益峰值不一致的频率，频率ω1被设定为可变至不同于频率ω2的频率。
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公开(公告)号：US20170033536A1
公开(公告)日：2017-02-02
申请号：US15193249
申请日：2016-06-27
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Kazuue FUJITA , Akio ITO , Tadataka EDAMURA , Tatsuo DOUGAKIUCHI
CPC classification number: H01S5/2018 , H01S5/0604 , H01S5/1096 , H01S5/18 , H01S5/24 , H01S5/3402 , H01S5/34306 , H01S2302/02
Abstract: A quantum cascade laser is configured with a semiconductor substrate, and an active layer provided on a first surface of the substrate and having a cascade structure in the form of a multistage lamination of unit laminate structures each of which includes an emission layer and an injection layer. The active layer is configured to be capable of generating first pump light of a frequency ω1 and second pump light of a frequency ω2 by intersubband emission transitions of electrons, and to generate output light of a difference frequency ω by difference frequency generation from the first pump light and the second pump light. Grooves respectively formed in a direction intersecting with a resonating direction in a laser cavity structure are provided on a second surface opposite to the first surface of the substrate.
Abstract translation: 量子级联激光器被配置为具有半导体衬底和设置在衬底的第一表面上的有源层，并且具有层叠结构的级联结构，该级联结构是单位层叠结构的多级叠层形式，每层包括发射层和注入层 。 有源层被配置为能够通过电子的子带间发射跃迁来产生频率ω1的第一泵浦光和频率ω2的第二泵浦光，并且通过来自第一泵的差频产生产生差频ω的输出光 光和第二个泵灯。 在与基板的第一表面相对的第二表面上设置分别在与激光腔结构中的谐振方向相交的方向上形成的槽。
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公开(公告)号：US20230253755A1
公开(公告)日：2023-08-10
申请号：US18103656
申请日：2023-01-31
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Tatsuo DOUGAKIUCHI , Akio ITO , Kazuue FUJITA
IPC: H01S5/02325 , H01S5/34 , H01S5/12 , H01S5/02253 , H01S5/02216 , H01S5/06 , H01S5/14 , H01S3/1055 , H01S5/02315
CPC classification number: H01S5/02325 , H01S5/3402 , H01S5/12 , H01S5/02253 , H01S5/02216 , H01S5/0607 , H01S5/141 , H01S3/1055 , H01S5/02315 , H01S2302/02
Abstract: The laser module includes a QCL element, a diffraction grating unit including a movable diffraction grating, a first lens that transmits light emitted from an end surface of the QCL element and light returning from the movable diffraction grating to the QCL element, a second lens that transmits terahertz waves emitted from the QCL element, a first holder, and a package. The first holder has a support surface on which the QCL element is mounted and a side surface connected to the support surface and facing the first lens in a resonance direction. A distance from an intersection point between the side surface and the support surface to the end surface along the resonance direction is smaller than a distance between the intersection point and the first lens along the resonance direction.
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