Invention Grant
- Patent Title: Distributed-feedback semiconductor laser device
- Patent Title (中): 分布式反馈半导体激光器件
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Application No.: US681820Application Date: 1984-12-14
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Publication No.: US4665528APublication Date: 1987-05-12
- Inventor: Naoki Chinone , Shinji Tsuji , Yoshihisa Fujisaki , Yasutoshi Kashiwada , Motohisa Hirao
- Applicant: Naoki Chinone , Shinji Tsuji , Yoshihisa Fujisaki , Yasutoshi Kashiwada , Motohisa Hirao
- Applicant Address: JPX Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JPX Tokyo
- Priority: JPX58-234238 19831214
- Main IPC: H01S5/00
- IPC: H01S5/00 ; H01S5/10 ; H01S5/12 ; H01S5/183 ; H01S3/19
Abstract:
Disclosed is a distributed feedback semiconductor laser provided with a grating which effects optical feedback by means of periodic corrugation disposed inside an optical resonator. The optical resonator has at least two regions having different bragg wavelength, and these regions are arranged longitudinally in the direction of an optical axis. The laser device can realize stable single longitudinal mode oscillation.
Public/Granted literature
- US5758576A Gripper bar for deliveries of printing presses Public/Granted day:1998-06-02
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