公开(公告)号：US20190312410A1

公开(公告)日：2019-10-10

申请号：US16432198

申请日：2019-06-05

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Takahiro SUGIYAMA ,  Yuu TAKIGUCHI ,  Yoshitaka KUROSAKA ,  Kazuyoshi HIROSE ,  Yoshiro NOMOTO ,  Soh UENOYAMA

IPC: H01S5/18 ,  H01S5/42 ,  H01S5/062

Abstract: A semiconductor light-emitting module according to the present embodiment includes a plurality of semiconductor light-emitting elements each outputting light of a desired beam projection pattern; and a support substrate holding the plurality of semiconductor light-emitting elements. Each of the plurality of semiconductor light-emitting elements includes a phase modulation layer configured to form a target beam projection pattern in a target beam projection region. The plurality of semiconductor light-emitting elements include first and second semiconductor light-emitting elements that are different in terms of at least any of a beam projection direction, the target beam projection pattern, and a light emission wavelength.

公开(公告)号：US20190252856A1

公开(公告)日：2019-08-15

申请号：US16292531

申请日：2019-03-05

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Kazuyoshi HIROSE ,  Yoshitaka KUROSAKA ,  Takahiro SUGIYAMA ,  Yuu TAKIGUCHI ,  Yoshiro NOMOTO

IPC: H01S5/183 ,  H01S5/028 ,  H01S5/42

Abstract: The present embodiment relates to a semiconductor light emitting element having a structure that enables removal of zero-order light from output light of an S-iPM laser. The semiconductor light emitting element includes an active layer, a pair of cladding layers, and a phase modulation layer. The phase modulation layer has a base layer and a plurality of modified refractive index regions each of which is individually arranged at a specific position. One of the pair of cladding layers includes a distributed Bragg reflector layer which has a transmission characteristic with respect to a specific optical image outputted along an inclined direction with respect to a light emission surface and has a reflection characteristic with respect to the zero-order light outputted along a normal direction of the light emission surface.

公开(公告)号：US20170256911A1

公开(公告)日：2017-09-07

申请号：US15505560

申请日：2015-08-28

Applicant: KYOTO UNIVERSITY ,  ROHM CO., LTD. ,  HAMAMATSU PHOTONICS K.K. ,  MITSUBISHI ELECTRIC CORPORATION

Inventor： Susumu NODA ,  Hitoshi KITAGAWA ,  Yong LIANG ,  Akiyoshi WATANABE ,  Kazuyoshi HIROSE

IPC: H01S5/10 ,  H01S3/02 ,  H01S5/343 ,  H01S5/042 ,  H01S3/067

CPC classification number: H01S5/105 ,  H01S5/0425 ,  H01S5/0654 ,  H01S5/18 ,  H01S5/18319 ,  H01S5/34313 ,  H01S5/34353

Abstract: A two-dimensional photonic crystal surface emitting laser capable of improving characteristics of light to be emitted, particularly optical output , which includes: a two-dimensional photonic crystal including a plate-shaped base member and modified refractive index regions where the modified refractive index regions have a refractive index different from that of the plate-shaped base member and are two-dimensionally and periodically arranged in the base member; an active layer provided on one side of the two-dimensional photonic crystal; and a first electrode and a second electrode provided sandwiching the two-dimensional photonic crystal and the active layer for supplying current to the active layer, where the second electrode covers a region equal to or wider than the first electrode, wherein the first electrode is formed so as to supply the current to the active layer with a different density depending on the in-plane position on the first electrode.

公开(公告)号：US20170222399A1

公开(公告)日：2017-08-03

申请号：US15120149

申请日：2015-02-13

Applicant: Kyoto University ,  HAMAMATSU PHOTONICS K.K.

Inventor： Kazuyoshi HIROSE ,  Akiyoshi WATANABE ,  Yoshitaka KUROSAKA ,  Takahiro SUGIYAMA ,  Susumu NODA

IPC: H01S5/10 ,  H01S5/022 ,  H01S5/343 ,  H01S5/042

CPC classification number: H01S5/105 ,  H01L2224/48091 ,  H01S5/005 ,  H01S5/0078 ,  H01S5/02208 ,  H01S5/02276 ,  H01S5/02292 ,  H01S5/02296 ,  H01S5/042 ,  H01S5/0425 ,  H01S5/06216 ,  H01S5/0622 ,  H01S5/0653 ,  H01S5/18 ,  H01S5/34313 ,  H01S5/34353 ,  H01L2924/00014

Abstract: A control circuit in this laser equipment drives a drive circuit of a photonic crystal laser element under a predetermined condition. It was found that a wavelength width of a laser beam to be output from the photonic crystal laser element is dependent on a standardized drive current k and a pulse width T, and had a predetermined relationship with these. By meeting this condition, a laser beam with a plurality of wavelengths can be controlled and output.

公开(公告)号：US20240195150A1

公开(公告)日：2024-06-13

申请号：US18286149

申请日：2022-03-02

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Kazuyoshi HIROSE ,  Masahiro HITAKA ,  Hiroki KAMEI ,  Takahiro SUGIYAMA

IPC: H01S5/183 ,  H01S5/042 ,  H01S5/11 ,  H01S5/323

CPC classification number: H01S5/18308 ,  H01S5/04252 ,  H01S5/04256 ,  H01S5/11 ,  H01S5/323

Abstract: A surface-emitting laser device includes a first electrode, a lower cladding layer, an active layer, an upper cladding layer, a relaxation layer, a contacting layer having a bandgap different from that of the upper cladding layer, a second electrode, and a photonic crystal layer provided between the lower cladding layer and the active layer or between the active layer and the upper cladding layer, including a basic region and a plurality of different refractive index regions that differ in refractive index from the basic region and are distributed two-dimensionally in a plane perpendicular to a thickness direction to form a resonance mode of light in the plane. The relaxation layer has a bandgap that is between a bandgap of the upper cladding layer and a bandgap of the contacting layer.

公开(公告)号：US20230369825A1

公开(公告)日：2023-11-16

申请号：US18029141

申请日：2021-09-28

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Kazuyoshi HIROSE ,  Hiroki KAMEI ,  Takahiro SUGIYAMA

IPC: H01S5/183 ,  H01S5/11

CPC classification number: H01S5/18305 ,  H01S5/18302 ,  H01S5/11

Abstract: A semiconductor laser element of the present disclosure reducing one-dimensional local oscillation includes a substrate, an active layer, and a phase modulation layer. The phase modulation layer includes a base layer and modified refractive index regions two-dimensionally placed on a reference surface. In a virtual square lattice on the reference surface, the gravity center of each modified refractive index region is placed away from the corresponding lattice point, and an angle of a vector connecting the corresponding lattice point to the gravity center is set individually. A lattice spacing and a light emission wavelength of the active layer satisfy a Γ-point oscillation condition. The gravity center of each modified refractive index region is placed such that the absolute value of the Fourier coefficient of an annular or a circular shape obtained by rotating each modified refractive index region with the corresponding lattice point is 0.01 or less.

公开(公告)号：US20230273015A1

公开(公告)日：2023-08-31

申请号：US18195508

申请日：2023-05-10

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Kazuyoshi HIROSE ,  Hiroki KAMEI ,  Takahiro SUGIYAMA ,  Akiyoshi WATANABE ,  Seiichiro MIZUNO

IPC: G01B11/25

CPC classification number: G01B11/2513

Abstract: A three-dimensional measurement device includes a plurality of light source units configured to irradiate the object to be measured with measurement light having predetermined patterns, an image capture unit configured to capture an image of the object to be measured which is irradiated with the measurement light, and a measurement unit configured to measure a three-dimensional shape of the object to be measured based on results of image capture performed by the image capture unit. The predetermined patterns of the measurement light include stripe patterns, respectively. The stripe patterns radiated from the plurality of light source units have respective patterns different from each other. The plurality of light source units are arrayed in a direction parallel to stripes in the stripe patterns. The measurement unit measures the three-dimensional shape of the object to be measured based on a three-dimensional shape measurement method using the stripe pattern.

公开(公告)号：US20230035423A1

公开(公告)日：2023-02-02

申请号：US17787976

申请日：2020-12-23

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Kazuyoshi HIROSE ,  Yoshitaka KUROSAKA ,  Soh UENOYAMA

IPC: G02F1/025 ,  H01S5/11 ,  H01S5/026

Abstract: This disclosure relates to a spatial light modulator, etc., the spatial light modulator being capable of dynamically controlling the phase distribution of light, and provided with a structure having a smaller pixel arrangement period and suitable for high-speed operation. The spatial light modulator includes a substrate. The substrate has a front surface, a back surface, and through-holes arranged one-dimensionally or two-dimensionally and penetrating between the front surface and the back surface. The spatial light modulator further includes layered structures each covering the inner walls of the through-holes. Each layered structure includes a first electroconductive layer on the inner wall, a dielectric layer on the first electroconductive layer and having optical transparency, and a second electroconductive layer on the dielectric layer and having optical transparency. At least one of the first and second electroconductive layers is electrically isolated for each group including one or more through-holes.

公开(公告)号：US20210318466A1

公开(公告)日：2021-10-14

申请号：US17226662

申请日：2021-04-09

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Soh UENOYAMA ,  Hiroki KAMEI ,  Kazuyoshi HIROSE

IPC: G02B1/00 ,  G02B3/08

Abstract: A method for producing an optical element includes: disposing a joint layer on a substrate; forming a first portion and a second portion in a second surface of the joint layer; and forming a plurality of structural bodies, which are made of a dielectric, on the second surface of the joint layer. The joint layer has a first surface facing the substrate, and the second surface located on a side opposite the first surface. The first portion is covered with a resist layer, and the second portion is exposed from the resist layer. After the dielectric is laminated on at least the second portion, the resist layer is removed to form the plurality of structural bodies on the second surface.

公开(公告)号：US20210226420A1

公开(公告)日：2021-07-22

申请号：US15734325

申请日：2019-06-05

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Yuta AOKI ,  Kazuyoshi HIROSE ,  Satoru OKAWARA

IPC: H01S5/183 ,  H01S5/343

Abstract: The present embodiment relates to a surface emitting type light-emitting element mainly including a nitride semiconductor and a layer for forming a resonance mode. The light-emitting element increases the optical confinement coefficient of a layer forming a resonance mode, includes an active layer, a phase modulation layer, and one or more high refractive index layers, and further includes, first and second cladding layers sandwiching the active layer, the phase modulation layer, and the high refractive index layer. The phase modulation layer includes a base layer and modified refractive index regions. The gravity centers of the modified refractive index regions are arranged on a straight line passing through each lattice point of a virtual square lattice and tilted with respect to the square lattice. The distance between the gravity center of each modified refractive index region and the lattice point is individually set according to the optical image.