Semiconductor laser module with built-in optical isolator

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	Semiconductor laser module with built-in optical isolator
其他题名	Semiconductor laser module with built-in optical isolator
	AOKI SATOSHI; MURATA ATSUSHI; TANAKA TSUYOSHI
	1992-01-08
专利权人	株式会社日立製作所
公开日期	1992-01-08
授权国家	日本
专利类型	发明申请
摘要	PURPOSE:To reduce the return of reflected light to a semiconductor laser largely even when the mechanical central axis of an optical isolator runs parallel with the optical axis of the semiconductor laser by mounting an optical glass plate having a wedge-shaped sectional shape on the light incidence side of the optical isolator. CONSTITUTION:Beams emitted from a semiconductor laser 1 are converted into collimated beams 3 by a first lens 2, passed through a glass plate 4, a vertical plane of which is inclined only by an angle theta1 and which has a wedge- shaped sectional shape, passed through an op tical isolator 9 composed of a polarizer 5, a Farady rotator 6, an analyzer 7 and a permanent magnet 8, condensed by a second lens 10 for condensing, and optically coupled with an optical fiber 1 Collimated beams 3 from the first lens 2 are refracted by the glass plate 4 and projected at an angle theta2 to the polarizer 5, the Faraday rotator 6 and the analyzer 7 at that time. Accordingly, return to the semiconductor laser 1 of reflected light generated on each plane of incidence can be prevented. A holding part 18 is slid to a hold ing part 16, the second lens 10 is positioned to collimated beams, and the holding part 18 is welded and fixed to the holding part 16.
其他摘要	用途：通过在灯上安装楔形截面形状的光学玻璃板，即使光学隔离器的机械中心轴与半导体激光器的光轴平行，也能大大减少反射光返回半导体激光器光隔离器的入射侧。组成：从半导体激光器1发射的光束由第一透镜2转换成准直光束3，通过玻璃板4，其垂直平面仅倾斜角度θ1并具有楔形截面形状，通过由偏振器5，法拉第旋转器6，分析器7和永磁体8组成的光学隔离器9，由第二透镜10会聚以便会聚，并与光纤11光学耦合。准直光束3来自第一透镜2被玻璃板4折射并且此时以角度θ2投射到偏振器5，法拉第旋转器6和分析器7。因此，可以防止在每个入射平面上产生的反射光返回到半导体激光器1。保持部分18滑动到保持部分16，第二透镜10定位成准直光束，并且保持部分18焊接并固定到保持部分16。
主权项	-
申请日期	1990-04-20
专利号	JP1992003484A
专利状态	失效
申请号	JP1990102998
公开（公告）号	JP1992003484A
IPC 分类号	G02B6/42 \| H01S5/00 \| H01S3/18
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/50614
专题	半导体激光器专利数据库
作者单位	株式会社日立製作所
推荐引用方式 GB/T 7714	AOKI SATOSHI,MURATA ATSUSHI,TANAKA TSUYOSHI. Semiconductor laser module with built-in optical isolator. JP1992003484A[P]. 1992-01-08.

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