公开(公告)号：US11067728B2

公开(公告)日：2021-07-20

申请号：US16285426

申请日：2019-02-26

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Tadataka Edamura ,  Atsushi Sugiyama ,  Tatsuo Dougakiuchi

IPC: G02B5/18

Abstract: A movable diffraction grating includes; a supporting portion; a movable portion which includes a first surface and is swingably connected with the supporting portion; a resin layer which is provided on the first surface and includes a diffraction grating pattern formed therein; a reflection layer which is provided on the resin layer an along the diffraction grating pattern and is formed of metal; and a stress regulation portion inducing stress on the movable portion, and the first surface is caused to bend concavely by stress.

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：US10361538B2

公开(公告)日：2019-07-23

申请号：US15687637

申请日：2017-08-28

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Atsushi Sugiyama ,  Tadataka Edamura

IPC: H01S3/10 ,  H01S5/14 ,  H01S5/06 ,  H01S5/12 ,  H01S5/34 ,  H01S3/1055

Abstract: A movable diffraction grating includes: a support portion; a movable portion swingably connected to the support portion; a coil buried in the movable portion; a magnetic field generator configured to apply a magnetic field to the coil; an insulation layer provided on a surface of the movable portion; a resin layer provided on the insulation layer and provided with a diffraction grating pattern; and a reflection layer formed of a metal and provided on the resin layer to follow the diffraction grating pattern.

公开(公告)号：US10236661B2

公开(公告)日：2019-03-19

申请号：US15901155

申请日：2018-02-21

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Atsushi Sugiyama ,  Tadataka Edamura ,  Naota Akikusa

IPC: H01S5/183 ,  H01S5/06 ,  H01S5/14 ,  H01S5/042 ,  H01S5/04 ,  H01S5/022 ,  H01S5/18 ,  H01S5/024

Abstract: A wavelength variable light source includes a housing, a heat sink disposed in the housing, an excitation light source disposed on the heat sink and configured to output excitation light, a gain medium disposed on the heat sink and including an active layer and a lower DBR, a MEMS mechanism including a movable film facing the gain medium via a gap, disposed on the gain medium, and configured to control the gap, an upper DBR provided in the movable film and configuring a resonator together with the lower DBR, a reflector configured to reflect the excitation light output from the excitation light source toward the gain medium in the housing, and a window formed in the housing and configured to transmit light output from the gain medium.

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.