公开(公告)号：USD960008S1

公开(公告)日：2022-08-09

申请号：US29750114

申请日：2020-09-11

Applicant: HAMAMATSU PHOTONICS K.K.

Designer： Tatsuo Dougakiuchi ,  Akio Ito ,  Masahiro Hitaka ,  Tadataka Edamura

公开(公告)号：US10591413B2

公开(公告)日：2020-03-17

申请号：US16021055

申请日：2018-06-28

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Tatsuo Dougakiuchi ,  Akio Ito ,  Kazuue Fujita ,  Tadataka Edamura

IPC: G01J3/30 ,  G01N21/39 ,  H01S5/343 ,  H01S5/10 ,  H01S5/20 ,  H01S5/026 ,  H01S5/00 ,  H01L31/0352 ,  H01S5/34 ,  H01S5/22 ,  H01S5/02 ,  G01N21/45 ,  H01S5/14 ,  H01S5/12 ,  H01S5/065

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.

公开(公告)号：US10014662B2

公开(公告)日：2018-07-03

申请号：US15193249

申请日：2016-06-27

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Kazuue Fujita ,  Akio Ito ,  Tadataka Edamura ,  Tatsuo Dougakiuchi

IPC: H01S5/10 ,  H01S5/20 ,  H01S5/24 ,  H01S5/34 ,  H01S5/343 ,  H01S5/06 ,  H01S5/18

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.

公开(公告)号：US10008829B2

公开(公告)日：2018-06-26

申请号：US15251119

申请日：2016-08-30

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Tatsuo Dougakiuchi ,  Kazuue Fujita ,  Akio Ito ,  Tadataka Edamura

IPC: H01S5/14 ,  H01S5/34 ,  H01S5/12 ,  H01S5/06 ,  H01S5/20 ,  H01S5/026 ,  H01S5/10 ,  H01S5/18

CPC classification number: H01S5/3402 ,  H01S5/0207 ,  H01S5/0267 ,  H01S5/0604 ,  H01S5/1028 ,  H01S5/1096 ,  H01S5/1221 ,  H01S5/124 ,  H01S5/141 ,  H01S5/18 ,  H01S5/2018 ,  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 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, and to generate output light of a difference frequency ω by difference frequency generation. An external diffraction grating is provided constituting an external cavity for generating the first pump light and configured to be capable of changing the frequency ω1, outside an element structure portion including the active layer. Grooves respectively formed in a direction intersecting with a resonating direction are provided on a second surface of the substrate.

公开(公告)号：USD960006S1

公开(公告)日：2022-08-09

申请号：US29749733

申请日：2020-09-09

Applicant: HAMAMATSU PHOTONICS K.K.

Designer： Tatsuo Dougakiuchi ,  Akio Ito ,  Masahiro Hitaka ,  Tadataka Edamura

公开(公告)号：USD892656S1

公开(公告)日：2020-08-11

申请号：US29684293

申请日：2019-03-20

Applicant: HAMAMATSU PHOTONICS K.K.

Designer： Tatsuo Dougakiuchi ,  Akio Ito ,  Masahiro Hitaka ,  Tadataka Edamura

公开(公告)号：US09929292B2

公开(公告)日：2018-03-27

申请号：US15423836

申请日：2017-02-03

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Tatsuo Dougakiuchi ,  Akio Ito ,  Tadataka Edamura ,  Kazuue Fujita

IPC: G01N21/3504 ,  H01L31/0352 ,  H01L31/0304 ,  H01L31/109 ,  H01L31/0216 ,  H01L31/0232

CPC classification number: H01L31/035236 ,  G01N21/3504 ,  G01N2201/068 ,  G01N2201/0873 ,  H01L31/02161 ,  H01L31/02327 ,  H01L31/03042 ,  H01L31/03046 ,  H01L31/035281 ,  H01L31/109

Abstract: A quantum cascade detector includes a semiconductor substrate; an active layer having a cascade structure; a lower cladding layer provided between the active layer and the substrate and having a lower refractive index than the active layer; a lower metal layer provided between the lower cladding layer and the substrate; an upper cladding layer provided on an opposite side to the substrate with respect to the active layer and having a lower refractive index than the active layer; and an upper metal layer provided on an opposite side to the active layer with respect to the upper cladding layer. A first end face being in a waveguide direction in a waveguide structure with the active layer, lower cladding layer, and upper cladding layer is an entrance surface for light to be detected.

公开(公告)号：US09912119B2

公开(公告)日：2018-03-06

申请号：US15253382

申请日：2016-08-31

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Akio Ito ,  Tatsuo Dougakiuchi ,  Kazuue Fujita ,  Tadataka Edamura

IPC: H01S5/24 ,  H01S5/14 ,  H01S5/34 ,  H01S5/06 ,  H01S5/10 ,  H01S5/12 ,  H01S5/02

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.