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公开(公告)号:US20210313769A1
公开(公告)日:2021-10-07
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
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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公开(公告)号:US20190232423A1
公开(公告)日:2019-08-01
申请号:US16256031
申请日:2019-01-24
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor: Yoshio MIZUTA , Takashi KURITA , Takeshi WATARI , Yuki KABEYA , Norio KURITA , Toshiyuki KAWASHIMA
IPC: B23K26/0622 , B23K26/356 , B23K26/00 , C21D10/00
CPC classification number: B23K26/0622 , B23K26/009 , B23K26/356 , C21D10/005
Abstract: A laser processing apparatus includes a light source which outputs a laser light, and a waveform control unit which controls a pulse waveform of the laser light irradiating the workpiece, in which the pulse waveform of the laser light controlled by the waveform control unit includes a main pulse and a foot pulse temporally preceding the main pulse, and a peak intensity of the foot pulse is smaller than a peak intensity of the main pulse, and a peak position of the main pulse is positioned in a retention time period of plasma generated due to an incidence of the foot pulse on the workpiece.
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