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公开(公告)号：US09882354B2
公开(公告)日：2018-01-30
申请号：US15124778
申请日：2015-03-03
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Yujin Zheng , Hirofumi Kan
CPC classification number: H01S5/4062 , H01S3/0804 , H01S3/08081 , H01S3/0815 , H01S5/02438 , H01S5/026 , H01S5/10 , H01S5/141 , H01S5/4025 , H01S5/405 , H01S5/4068 , H01S5/42
Abstract: A semiconductor laser device includes: a semiconductor laser array in which a plurality of active layers that emit laser lights with a divergence angle θS (>4°) in a slow axis direction are arranged; a first optical element that reflects first partial lights by a first reflecting surface and returns the first partial lights to the active layers; and a second optical element that reflects partial mode lights of second partial lights by a second reflecting surface and returns the partial mode lights to the active layers, the first reflecting surface forms an angle equal to or greater than 2° and less than (θS/2) with a plane perpendicular to an optical axis direction of the active layers, and the second reflecting surface forms an angle greater than (−θS/2) and equal to or less than −2° with the plane perpendicular to the optical axis direction of the active layers.
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公开(公告)号：US12155177B2
公开(公告)日：2024-11-26
申请号：US17265983
申请日：2019-05-31
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Yujin Zheng , Takashi Sekine , Yoshinori Kato , Norio Kurita , Toshiyuki Kawashima
IPC: H01S5/00 , H01S3/08 , H01S3/1055 , H01S5/0239 , H01S5/14 , H01S5/40 , H01S5/065
Abstract: An external resonator-type semiconductor laser device 1A includes an external resonator formed of one or a plurality of laser diode light sources and a VBG; an optical fiber which outputs output light La from the laser diode light source toward the VBG, and into which return light Lb from the VBG is input; and a displacement unit that displaces a disposition position of the VBG with respect to an input and output end surface of the optical fiber.
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