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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
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.
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公开(公告)号：US20200209653A1
公开(公告)日：2020-07-02
申请号：US16622497
申请日：2018-06-13
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Yuu TAKIGUCHI , Kazuyoshi HIROSE , Yoshitaka KUROSAKA , Takahiro SUGIYAMA , Yoshiro NOMOTO , Soh UENOYAMA
Abstract: The present embodiment relates to a light-emitting device that enables reduction in attenuation or diffraction effect caused by a semiconductor light-emitting device with respect to modulated light outputted from a spatial light modulator, and the light-emitting device includes the semiconductor light-emitting device that outputs light from a light output surface and the reflection type spatial light modulator that modulates the light. The spatial light modulator includes a light input/output surface having the area larger than the area of a light input surface of the semiconductor light-emitting device, modulates light taken through a region facing the light output surface of the semiconductor light-emitting device in the light input/output surface, and outputs the modulated light from another region of the light input/output surface to a space other than the light input surface of the semiconductor light-emitting device.
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公开(公告)号：US20190181613A1
公开(公告)日：2019-06-13
申请号：US16323625
申请日：2017-08-10
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Yoshitaka KUROSAKA , Kazuyoshi HIROSE , Takahiro SUGIYAMA , Yuu TAKIGUCHI , Yoshiro NOMOTO
Abstract: The present embodiment relates to a light emitting device having a structure capable of removing zero order light from output light of an S-iPM laser. The light emitting device includes a semiconductor light emitting element and a light shielding member. 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 basic layer and a plurality of modified refractive index regions, each of which is individually disposed at a specific position. The light shielding member has a function of passing through a specific optical image output along an inclined direction and shielding zero order light output along a normal direction of a light emitting surface.
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公开(公告)号：US20170012407A1
公开(公告)日：2017-01-12
申请号：US15115713
申请日：2014-11-10
Applicant: KYOTO UNIVERSITY , HAMAMATSU PHOTONICS K.K.
Inventor： Akiyoshi WATANABE , Yoshitaka KUROSAKA , Kazuyoshi HIROSE , Takahiro SUGIYAMA , Susumu NODA
IPC: H01S5/0683 , H01S5/18 , H01S5/10 , H01S5/022
CPC classification number: H01S5/0683 , H01S5/022 , H01S5/105 , H01S5/18 , H01S5/187
Abstract: A surface emitting laser element capable of emitting a main beam and a sub-beam, and a monitoring light detection element capable of detecting a light intensity of the sub-beam are included, the surface emitting laser element is a PCSEL, the main beam and the sub-beam are emitted in an upward direction of the surface emitting laser element and are inclined to each other at a predetermined angle, and respective changes in a peak light intensity of the main beam and a peak light intensity of the sub-beam with respect to a value of a driving current of the surface emitting laser element are correlated with each other. Therefore, if an output of the monitoring light detection element indicating the peak light intensity of the sub-beam is used, the peak light intensity of the main beam can be estimated.
Abstract translation: 包括能够发射主光束和子光束的表面发射激光器元件和能够检测子光束的光强度的监视光检测元件，表面发射激光器元件是PCSEL，主光束和 子光束在表面发射激光器元件的向上方向上发射，并且以预定角度彼此倾斜，并且主光束的峰值光强度和子光束的峰值光强度各自变化， 相对于表面发射激光元件的驱动电流的值彼此相关。 因此，如果使用表示子光束的峰值光强度的监视光检测元件的输出，则可以估计主光束的峰值光强度。
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公开(公告)号：US20160020581A1
公开(公告)日：2016-01-21
申请号：US14771911
申请日：2014-02-27
Applicant: KYOTO UNIVERSITY , HAMAMATSU PHOTONICS K.K.
Inventor： Kazuyoshi HIROSE , Akiyoshi WATANABE , Yoshitaka KUROSAKA , Takahiro SUGIYAMA , Susumu NODA
CPC classification number: H01S5/18 , H01S3/08009 , H01S5/0425 , H01S5/105 , H01S5/12 , H01S5/1231 , H01S5/183 , H01S5/18319 , H01S5/187 , H01S2301/14
Abstract: A semiconductor laser element is realized with high beam quality (index M2
Abstract translation: 半导体激光元件实现了高光束质量（指标M2 <1）。 衍射光栅层6的衍射光栅6ba沿主表面2a延伸并设置在衍射光栅层6的p侧表面6a上; 衍射光栅层6的折射率在衍射光栅6ba中沿主表面2a延伸的方向周期性地变化; 衍射光栅6ba具有多个孔6b; 多个孔6b设置在p侧表面6a中并且沿着正方形格子R3平移对称地布置; 多个孔6b各自具有相同的尺寸和形状; 每个孔6b对应于衍射光栅6ba的晶格点，并且具有三棱柱形状; 孔6b的底面6c的形状为近似的直角三角形。
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Patent Agency Ranking
公开(公告)号：US20160020576A1
公开(公告)日：2016-01-21
申请号：US14772459
申请日：2014-03-07
Applicant: KYOTO UNIVERSITY , HAMAMATSU PHOTONICS K.K.
Inventor： Akiyoshi WATANABE , Kazuyoshi HIROSE , Yoshitaka KUROSAKA , Takahiro SUGIYAMA , Susumu NODA
CPC classification number: H01S5/0092 , G02F1/3544 , G02F1/3551 , G02F1/3558 , G02F1/37 , G02F2001/3548 , H01S5/02248 , H01S5/02446 , H01S5/105 , H01S5/18 , H01S5/187
Abstract: In a laser device, a different refractive index region 6B of a photonic crystal layer is arranged at a lattice point position of a square lattice. In the case where a plane shape of the different refractive index regions 6B is a nearly isosceles right triangle, two sides forming a right angle extend along longitudinal and horizontal lateral lines of the square lattice. A direction parallel to or vertical to an oblique side of the triangle and a direction of polarization in the periodic polarization inversion structure of a nonlinear optical crystal NL are the same.
Abstract translation: 在激光装置中，将光子晶体层的不同的折射率区域6B配置在正方格子的格子点位置。 在不同折射率区域6B的平面形状是近似等腰直角三角形的情况下，形成直角的两边沿着正方形格子的纵向和横向的横向延伸。 与非线性光学晶体NL的周期极化反转结构中的三角形的倾斜侧平行或垂直的方向和偏振方向相同。
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公开(公告)号：US20220037849A1
公开(公告)日：2022-02-03
申请号：US17414070
申请日：2019-12-11
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Akio ITO , Yoshitaka KUROSAKA , Masahiro HITAKA , Kazuyoshi HIROSE , Tadataka EDAMURA
IPC: H01S5/026 , H01S5/042 , H01S5/343 , H01S5/0236 , G06F30/10
Abstract: The light-emitting element of an embodiment outputs a clear optical image while suppressing light output efficiency reduction, and includes a substrate, a light-emitting unit, and a bonding layer. The light-emitting unit has a semiconductor stack, including a phase modulation layer, between first and second electrodes. The phase modulation layer has a base layer and modified refractive index regions, and includes a first region having a size including the second electrode, and a second region. Each gravity center of the second region's modified refractive index region is arranged by an array condition. The light from the stack is a single beam, and regarding a first distance from the substrate to the stack's front surface and a second distance from the substrate to the stack's back surface, a variation amount of the first distance along a direction on the substrate is smaller than a variation amount of the second distance.
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公开(公告)号：US20210273411A1
公开(公告)日：2021-09-02
申请号：US17054000
申请日：2019-05-14
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Soh UENOYAMA , Kazuyoshi HIROSE , Yoshitaka KUROSAKA , Hiroshi TANAKA
Abstract: The present embodiment relates to a light-emitting device comprising a reflective metasurface modulating a phase for each of pixels constituting a one- or two-dimensional array. The light-emitting device comprises a surface emitting laser element, a light guide layer, and the metasurface. The metasurface has a light transmissive layer including a dielectric layer, one metal film on one surface thereof, and the other metal film on the other surface thereof. In each of unit regions corresponding to the pixels, the light transmissive layer includes a portion exposed without being covered with the metal film. The width of each unit region and the thickness of the light transmissive layer are smaller than the wavelength of the laser light to the metasurface. The metasurface modulates the phase of the laser light for each unit region. A first light output surface outputs the modulated laser.
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公开(公告)号：US20210226412A1
公开(公告)日：2021-07-22
申请号：US17269313
申请日：2019-08-27
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Kazuyoshi HIROSE , Yuu TAKIGUCHI , Takahiro SUGIYAMA , Yoshitaka KUROSAKA
Abstract: The present embodiment relates to a light emission device capable of removing zero-order light from output light of an S-iPM laser. The light emission device comprises an active layer and a phase modulation layer. The phase modulation layer includes a base layer and a plurality of modified refractive index regions. In a state in which a virtual square lattice is set on the phase modulation layer, a center of gravity of each modified refractive index region is separated from a corresponding lattice point, and a rotation angle around each lattice point that decides a position of the center of gravity of each modified refractive index region is set according to a phase distribution for forming an optical image. A lattice spacing and an emission wavelength satisfy a condition of M-point oscillation in a reciprocal lattice space of the phase modulation layer. A magnitude of at least one of in-plane wavenumber vectors in four directions formed in the reciprocal lattice space and each including a wavenumber spread corresponding to an angle spread of the output light is smaller than 2π/λ.
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公开(公告)号：US20200373739A1
公开(公告)日：2020-11-26
申请号：US16769805
申请日：2018-11-28
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Kazuyoshi HIROSE , Yoshitaka KUROSAKA , Yuu TAKIGUCHI , Takahiro SUGIYAMA
Abstract: The embodiment relates to a light-emitting device in which a positional relationship between a modified refractive index region's gravity-center position and the associated lattice point differs from a conventional device, and a production method. In this device, a stacked body including a light-emitting portion and a phase modulation layer optically coupled to the light-emitting portion is on a substrate. The phase modulation layer includes a base layer and plural modified refractive index regions in the base layer. Each modified refractive index region's gravity-center position locates on a virtual straight line passing through a corresponding reference lattice point among lattice points of a virtual square lattice on the base layer's design plane. A distance between the reference lattice point and the modified refractive index region's gravity center along the virtual straight line is individually set such that this device outputs light forming an optical image.
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