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公开(公告)号：US09048624B2
公开(公告)日：2015-06-02
申请号：US14362435
申请日：2012-12-05
Applicant: Kyoto University , HAMAMATSU PHOTONICS K.K.
Inventor： Susumu Noda , Yoshitaka Kurosaka , Akiyoshi Watanabe , Kazuyoshi Hirose , Takahiro Sugiyama
CPC classification number: H01S5/105 , H01S5/0425 , H01S5/06243 , H01S5/1085 , H01S5/1218 , H01S5/323 , H01S5/34313 , H01S5/4056
Abstract: According to a finite difference between inverse numbers of arrangement periods (a1 and a2) in first and second periodic structures, when seen in a thickness direction of a semiconductor laser element, at least two laser beams that form a predetermined angle (δθ) with respect to a lengthwise direction of a first driving electrode (E2) are generated in the semiconductor laser element, one of the laser beams is set to be totally reflected in a light emission end surface, and a refractive angle (θ3) of the other laser beam is set to be less than 90 degrees.
Abstract translation: 根据第一和第二周期结构中的排列周期（a1和a2）的倒数之间的有限差，当在半导体激光元件的厚度方向上看时，至少两个激光束形成预定角度（δ' 在半导体激光元件中产生相对于第一驱动电极（E2）的长度方向的一个激光束，其中一个激光束被设定为在发光端面中被全反射，并且将折射角（＆ 其他激光束设定为小于90度。
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公开(公告)号：US12074410B2
公开(公告)日：2024-08-27
申请号：US17287149
申请日：2019-10-23
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Takahiro Sugiyama , Akiyoshi Watanabe , Hiroki Miyachi , Ryoichi Kashiro , Takeshi Kanzaki
CPC classification number: H01S5/11 , H01S5/0216 , H01S5/3211
Abstract: One aspect relates to a light-emitting element having a layer forming a resonance mode. The light-emitting element includes a structure body constituted by a substrate and a semiconductor laminate body including a first cladding layer, a second cladding layer, an active layer, and a resonance-mode forming layer including a basic layer and modified refractive index regions. A laser light output region and a metal electrode film are on opposing surfaces of the structure body. The metal electrode film includes a first layer forming ohmic contact with the structure body, a second layer reflecting light from the resonance-mode forming layer, a third layer, and a fourth layer for solder bonding. The third layer has a different composition from the second layer and the fourth layer, and has a lower diffusion degree than the second layer and the fourth layer to that of a solder material.
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公开(公告)号：US09698562B2
公开(公告)日：2017-07-04
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
IPC: G02F1/35 , H01S5/00 , H01S5/18 , H01S5/022 , H01S5/10 , G02F1/37 , G02F1/355 , H01S5/024 , H01S5/187
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.
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公开(公告)号：US09667028B2
公开(公告)日：2017-05-30
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
IPC: G02F1/35 , H01S5/00 , H01S5/18 , H01S5/022 , H01S5/10 , G02F1/37 , G02F1/355 , H01S5/024 , 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.
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公开(公告)号：US20140348193A1
公开(公告)日：2014-11-27
申请号：US14362435
申请日：2012-12-05
Applicant: Kyoto University , HAMAMATSU PHOTONICS K.K.
Inventor： Susumu Noda , Yoshitaka Kurosaka , Akiyoshi Watanabe , Kazuyoshi Hirose , Takahiro Sugiyama
CPC classification number: H01S5/105 , H01S5/0425 , H01S5/06243 , H01S5/1085 , H01S5/1218 , H01S5/323 , H01S5/34313 , H01S5/4056
Abstract: According to a finite difference between inverse numbers of arrangement periods (a1 and a2) in first and second periodic structures, when seen in a thickness direction of a semiconductor laser element, at least two laser beams that form a predetermined angle (δθ) with respect to a lengthwise direction of a first driving electrode (E2) are generated in the semiconductor laser element, one of the laser beams is set to be totally reflected in a light emission end surface, and a refractive angle (θ3) of the other laser beam is set to be less than 90 degrees.
Abstract translation: 根据第一和第二周期结构中的排列周期（a1和a2）的倒数之间的有限差，当在半导体激光元件的厚度方向上看时，至少两个激光束形成预定角度（δ' 在半导体激光元件中产生相对于第一驱动电极（E2）的长度方向的一个激光束，其中一个激光束被设定为在发光端面中被全反射，并且将折射角（＆ 其他激光束设定为小于90度。
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Patent Agency Ranking
公开(公告)号：US10461501B2
公开(公告)日：2019-10-29
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
Abstract: To provide a two-dimensional photonic crystal surface emitting laser capable of improving characteristics of light to be emitted, in particular, optical output power. The two-dimensional photonic crystal surface emitting laser 10X includes: a two-dimensional photonic crystal 123 including a plate-shaped base member 121 and modified refractive index regions 122 where the modified refractive index regions 122 have a refractive index different from that of the plate-shaped base member 121 and are two-dimensionally and periodically arranged in the base member; an active layer 11 provided on one side of the two-dimensional photonic crystal 123; and a first electrode 15A and a second electrode 16 provided sandwiching the two-dimensional photonic crystal 123 and the active layer 11 for supplying current to the active layer 11, where the second electrode 16 covers a region equal to or wider than the first electrode 15A, wherein the first electrode 15A is formed so as to supply the current to the active layer 11 with a different density depending on the in-plane position on the first electrode 15A.
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公开(公告)号：US09583914B2
公开(公告)日：2017-02-28
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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公开(公告)号：US12181273B2
公开(公告)日：2024-12-31
申请号：US17175059
申请日：2021-02-12
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Kazuyoshi Hirose , Hiroki Kamei , Takahiro Sugiyama , Akiyoshi Watanabe
IPC: G01B11/25 , G06T7/521 , G06V10/145
Abstract: A three-dimensional measurement device includes one or a plurality of light source units configured to irradiate the object to be measured SA with measurement light having a predetermined pattern, one or a plurality of image capture units 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 on the basis of results of image capture performed by the image capture units. The light source units are constituted by an S-iPMSEL of M-point oscillation.
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公开(公告)号：US09722396B2
公开(公告)日：2017-08-01
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: H01S5/10 , H01S5/18 , H01S5/0683 , H01S5/022 , H01S5/187
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.
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公开(公告)号：US10938177B2
公开(公告)日：2021-03-02
申请号：US16585948
申请日：2019-09-27
Applicant: KYOTO UNIVERSITY , ROHM CO., LTD. , HAMAMATSU PHOTONICS K.K. , MITSUBISHI ELECTRIC CORPORATION
Inventor： Susumu Noda , Hitoshi Kitagawa , Yong Liang , Akiyoshi Watanabe , Kazuyoshi Hirose
Abstract: To provide a two-dimensional photonic crystal surface emitting laser capable of improving characteristics of light to be emitted, in particular, optical output power. The two-dimensional photonic crystal surface emitting laser 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.
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