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	Device for driving a semiconductor laser by a plurality of driving elements
	TAGUCHI, TOYOKI
	1997-12-02
著作权人	KABUSHIKI KAISHA TOSHIBA
专利号	US5694409
国家	美国
文献子类	授权发明
其他题名	Device for driving a semiconductor laser by a plurality of driving elements
英文摘要	A semiconductor laser apparatus comprises a semiconductor laser, a photodetector, first and second variable gain units, a controllable amplifying unit, a driving unit, and a compensation unit. A control signal is supplied to one of input terminals of each of the first and second variable gain units and an output signal of the photodetector is negative-fed back to the other of the input terminals of each of the first and second variable gain units. A varied gain of an error between the control signal and the output signal is output independently of each of the first and second variable gain units. The controllable amplifying unit amplifies the error signal from the first variable gain unit with desired frequency characteristics. The driving unit includes a plurality of driving elements connected in parallel and supplies a driving current to the semiconductor laser in accordance with a drive control signal from the controllable amplifying unit. The compensation unit negatively feeds back a compensation current to the negative feedback terminals to compensate a phase delay on the basis of the error signal output from the second variable gain unit.
公开日期	1997-12-02
申请日期	1996-09-12
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/33544]
专题	半导体激光器专利数据库
作者单位	KABUSHIKI KAISHA TOSHIBA
推荐引用方式 GB/T 7714	TAGUCHI, TOYOKI. Device for driving a semiconductor laser by a plurality of driving elements. US5694409. 1997-12-02.

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