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	Distributed feedback laser
	YAMAUCHI HIDEKI
	1991-08-16
著作权人	SANYO ELECTRIC CO LTD
专利号	JP1991188693A
国家	日本
文献子类	发明申请
其他题名	Distributed feedback laser
英文摘要	PURPOSE:To prevent the end face of a resonator from being broken even in case a light density is high and to contrive the speedup of a distributed feedback laser by a method wherein a light density in the central part of the resonator is made relatively higher than that in the vicinity of the end face of the resonator. CONSTITUTION:A buffer layer 2, a clad layer 3, an active layer 4, a barrier layer 5 and a guide layer 6 are continuously grown in order on a substrate Then, a secondary diffraction grating 11 is formed in the layer 6 by an interference exposure and a chemical etching. At this time, the depth of etching is adjusted so that the product of a resonator length and a coupling coefficient is a prescribed value. Thereby, a light density in the central part of a resonator becomes relatively higher than that in the vicinity of the end face of the resonator, a breaking of the end face is never generated, the upper limit of a modulated frequency is not restricted and a distributed feedback laser can be speeded up.
公开日期	1991-08-16
申请日期	1989-12-18
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/76350]
专题	半导体激光器专利数据库
作者单位	SANYO ELECTRIC CO LTD
推荐引用方式 GB/T 7714	YAMAUCHI HIDEKI. Distributed feedback laser. JP1991188693A. 1991-08-16.

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