公开(公告)号：US20170229842A1

公开(公告)日：2017-08-10

申请号：US15426289

申请日：2017-02-07

Applicant: Showa Optronics Co., Ltd.

Inventor： Masami HATORI ,  Kenji OHARA ,  Takuya ARICHI

IPC: H01S5/042 ,  H01S5/14

CPC classification number: H01S5/0427 ,  H01S5/0287 ,  H01S5/0428 ,  H01S5/0653 ,  H01S5/0655 ,  H01S5/06832 ,  H01S5/141 ,  H01S5/32341

Abstract: A semiconductor laser device with external resonator with stable longitudinal mode regardless of variation of drive current is disclosed. The device includes: a semiconductor light-emitting element having a pair of end faces with a light emitting section disposed therebetween, and an external resonator configured to oscillate light emitted from the semiconductor light-emitting element, the external resonator being formed by a resonator mirror disposed outside the semiconductor light-emitting element and one of the pair of end faces that is farther from the resonator mirror, wherein, as the semiconductor light-emitting element, a semiconductor light-emitting element having a structure which does not oscillate light emitted therefrom by itself is used. The device further includes a wavelength control element disposed in the optical path within the external resonator and configured to select a wavelength range of the light, and a driver circuit configured to perform fast modulation drive of the semiconductor light-emitting element.