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	Electrically pumpable distributed feedback diode laser
	-
	1978-06-14
著作权人	XEROX CORP
专利号	GB1513892A
国家	英国
文献子类	授权发明
其他题名	Electrically pumpable distributed feedback diode laser
英文摘要	1513892 Lasers XEROX CORP 19 May 1975 [15 Oct 1974] 21263/75 Heading H1C In a heterostructure semiconductor laser in which a light waveguide region 3, Fig. 1, has a periodically toothed boundary 1 which produces distributed Bragg scattering feedback necessary for lasing, an output beam of a desired wavelength and of a particular transverse mode is obtained by boundary design using mathematical calculations involving the width w, the depth g and the periodicity # of the boundary teeth, the thickness t of the waveguide region and its refractive index n2, and the refractive indices n1' n3 of the semiconductor regions 2, 4 adjacent the waveguide region. The mathematical steps which are set out in detail in the specification involve the determination of the propagation constant B of a selected mode of the light waves obtainable in the laser, using this constant to calculate the coupling constant K of the selected mode, and using the resultant to calculate the required tooth periodicity. The method may also be used to determine the output wavelength of a given structure. The single heterostructure GaAlAs -GaAs shown in Fig. 1 may alternatively comprise a double heterostructure, Fig. 3 (not shown) by forming region 4 from n-type GaAlAs.
公开日期	1978-06-14
申请日期	1975-05-19
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/42168]
专题	半导体激光器专利数据库
作者单位	XEROX CORP
推荐引用方式 GB/T 7714	-. Electrically pumpable distributed feedback diode laser. GB1513892A. 1978-06-14.

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