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	IC type optical semiconductor unit
	KITAMURA MITSUHIRO
	1991-02-26
著作权人	NEC CORP
专利号	JP1991044989A
国家	日本
文献子类	发明申请
其他题名	IC type optical semiconductor unit
英文摘要	PURPOSE:To obtain a highly stable and reliable IC type optical semiconductor unit for broadcasting reception at low cost by integrating optical components to form a receiver, receiving a beat signal produced by a signal light and station emission, and feeding back a part of the output to a laser control region. CONSTITUTION:This semiconductor unit is designed to comprise a waveguide passage 21 on a filter side and a waveguide passage 24 on a laser side and a light receiving element 25 so that the element 25 may be electrically connected with a control region 28 of a wavelength variable laser 23 by way of a control circuit 27. Under this structure, multi-channel signal light input from the left side of an optical filter 20 is selected by the filter 20 and jointed with the light of the laser 23 at a coupler 22 and its beat signal is detected by the element 25. The output of the element 25 is partially is fed back to a region 28 of the laser 23 by way of an amplification circuits 26 and the control circuit 27. This feedback mechanism enables stable reception constantly under the stable beat signal.
公开日期	1991-02-26
申请日期	1989-07-12
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/64920]
专题	半导体激光器专利数据库
作者单位	NEC CORP
推荐引用方式 GB/T 7714	KITAMURA MITSUHIRO. IC type optical semiconductor unit. JP1991044989A. 1991-02-26.

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