Semiconductor laser module with optical isolator

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	Semiconductor laser module with optical isolator
其他题名	Semiconductor laser module with optical isolator
	ONODA YOSHITO; CHIKAMA TERUMI; GOTO MASAMI
	1987-04-21
专利权人	FUJITSU LTD
公开日期	1987-04-21
授权国家	日本
专利类型	发明申请
摘要	PURPOSE:To reduce the spacing between a semiconductor laser and an optical fiber and improve coupling efficiency by a method wherein a semi-spherical thin type Faraday rotor and a polarization separating plate are provided between the semiconductor laser and the optical fiber and magnets are provided around them and those parts are enclosed and held solidly by a holder. CONSTITUTION:When a light is transmitted from a semiconductor laser LD to an optical fiber F, the horizontal polarized light component l1 is rotated by 45 deg. by a Faraday rotor TFR as shown by a symbol l2. As this direction is perpendicular to the optical axis of a polarization separating plate PS, the light l2 enters the polarization separating plate PS as an ordinary light and senses a refractive index no and enters the optical fiber F after being transmitted. In the case of a feedback light, its ordinary light component lo and extraordinary light component le sense refractive indices no and ne respectively to create complex refraction and the extraordinary light component le is polarized and only the ordinary light component lo is rotated by 45 deg. by the Faraday rotor TFR as shown by a symbol lo1 and returned to the semiconductor laser LD. As the direction of this light is perpendicular to the semiconductor laser LD, the deterioration of the wavelength can be neglected.
其他摘要	用途：通过在半导体激光器和光纤之间提供半球形薄型法拉第转子和偏振分离板并在周围提供磁体的方法来减小半导体激光器和光纤之间的间距并提高耦合效率它们和那些部件由一个支架封闭并牢固地固定。组成：当光从半导体激光器LD传输到光纤F时，水平偏振光分量l1旋转45度。通过法拉第转子TFR，如符号l2所示。当该方向垂直于偏振分离板PS的光轴时，光12作为普通光进入偏振分离板PS并感测折射率no并在透射后进入光纤F.在反馈光的情况下，其普通光分量和非常光分量分别感测折射率no和ne以产生复合折射，并且非常光分量le被偏振并且仅普通光分量lo旋转45度。通过法拉第转子TFR，如符号lo1所示，并返回到半导体激光器LD。由于该光的方向垂直于半导体激光器LD，所以可以忽略波长的劣化。
申请日期	1985-10-11
专利号	JP1987086780A
专利状态	失效
申请号	JP1985224872
公开（公告）号	JP1987086780A
IPC 分类号	G02B27/28 \| G02B6/293 \| G02B6/42 \| H01S5/00 \| G02B6/28 \| 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/181661/70657
专题	半导体激光器专利数据库
作者单位	FUJITSU LTD
推荐引用方式 GB/T 7714	ONODA YOSHITO,CHIKAMA TERUMI,GOTO MASAMI. Semiconductor laser module with optical isolator. JP1987086780A[P]. 1987-04-21.

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