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	Semiconductor laser driving device
	KARAKI MORIHIRO; SHINODA MASAHISA; SATO YASUYUKI
	1990-01-12
著作权人	三菱電機株式会社
专利号	JP1990009026A
国家	日本
文献子类	发明申请
其他题名	Semiconductor laser driving device
英文摘要	PURPOSE:To eliminate the need of the separate detection of each optical output, to relax the positioning accuracy and to improve the mass-producing property by receiving laser beams from plural pieces of light sources in a lump by a two-division photodetector, and calculating an optical output signal, and detecting separately optical outputs from each light source. CONSTITUTION:A front laser luminous flux from two pieces of laser light sources of a semiconductor laser array 6 is divided into two by a beam splitter 20, and one of them is received in a lump by a two-division photodetector 22. Subsequently, an optical output signal passes through current/voltage converters 23, 24 and processed by an arithmetic circuit means having differential amplifiers 25, 27 and amplifiers 26, 28 and 29, the corresponding output of the detector 22 corresponding to a front light 12b is calculated as the product of a difference output of the transducers 23, 24 and a proportional constant K2 corresponding to an amplification factor of the amplifier 28, and in the same way, the corresponding output of the front light 12a is calculated and optical outputs of each light source are detected separately. Next, based on the detected output, the intensity of a laser light from each light source is adjusted so as to be made constant through driving circuits 30a, 30b. According to such constitution, it is unnecessary to detect separately each optical output, and the constitution of an optical system is simplified.
公开日期	1990-01-12
申请日期	1988-06-28
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/69002]
专题	半导体激光器专利数据库
作者单位	三菱電機株式会社
推荐引用方式 GB/T 7714	KARAKI MORIHIRO,SHINODA MASAHISA,SATO YASUYUKI. Semiconductor laser driving device. JP1990009026A. 1990-01-12.

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