QQ客服 官方微博 反馈留言

	Semiconductor laser transmitting circuit
	MOTEGI MITSUHIRO; TAKAHASHI MASAAKI
	1983-12-27
著作权人	FUJITSU KK
专利号	JP1983225744A
国家	日本
文献子类	发明申请
其他题名	Semiconductor laser transmitting circuit
英文摘要	PURPOSE:To eliminate the need for a beam splitter and to reduce loss to a main light signal, by using a polarized component which is not used for communication as a loop-back light signal in a duplicated semiconductor laser transmitting circuit. CONSTITUTION:The TM polarized component of a laser diode LD21 is polarized at right angled by a polarizer 25 and coupled with an optical fiber 15, and the TM polarized component of an LD22 enters and advances straight in the polarizer 25 and is coupled with the optical fiber 15 through the same route with the TM polarized component of the LD2 Therefore, the TM polarized components are transmitted to the optical fiber 15 through the polarizer 25 regardless of which of the LDs 21 and 22 is in use. A control circuit 13 detects a fault search signal during fault searching operation and then opens an optical switch 14. The TM polarized component transmitted through the optical fiber 15 is converted by a photodetecting element 10 into an electric signal, which is recovered into the light signal through a 3R circuit 11 and a light emitting element 12; and the light signal is returned to the terminal station through the optical fiber 5, thus sending the main signal back. Therefore, a beam splitter, etc., for extracting a loop-back signal are excluded from the main signal path and loss to the main signal is reduced.
公开日期	1983-12-27
申请日期	1982-06-24
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/62860]
专题	半导体激光器专利数据库
作者单位	FUJITSU KK
推荐引用方式 GB/T 7714	MOTEGI MITSUHIRO,TAKAHASHI MASAAKI. Semiconductor laser transmitting circuit. JP1983225744A. 1983-12-27.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。