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	Semiconductor laser driver
	SAKURAI TATSUAKI
	1992-03-02
著作权人	RICOH CO LTD
专利号	JP1992065178A
国家	日本
文献子类	发明申请
其他题名	Semiconductor laser driver
英文摘要	PURPOSE:To prevent flow of a current which is not controlled, to eliminate an abnormal light emission and to protect a semiconductor laser against deterioration by providing a quasi-signal input circuit and controlling by ON, OFF of first and second switches at a suitable timing. CONSTITUTION:A power source 7 is turned ON in a state that first and second switches 9, 12 are opened at the initial time of turning ON the power source. Then, when a semiconductor laser 1 actually emits a light, the switch 12 remains opened, and the switch 9 is closed. Thus, a voltage gradually raising through a slow-starter 8 is applied to the anode of the laser In this case, the input of a current controller 5 constitutes a quasi-signal input circuit. A GND level signal is applied to a resistance circuit 11 as a quasi-signal reception signal. When the laser 1 is deenergized, the switch 12 is previously opened to set the input of the controller 5 to a quasi-reception signal, and then the switch 9 is opened. Thus, a current which is not controlled does not flow to prevent emission of an abnormal light.
公开日期	1992-03-02
申请日期	1990-07-05
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/69107]
专题	半导体激光器专利数据库
作者单位	RICOH CO LTD
推荐引用方式 GB/T 7714	SAKURAI TATSUAKI. Semiconductor laser driver. JP1992065178A. 1992-03-02.

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