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	Semiconductor laser driving device
	OTSUKI NORIYOSHI
	1988-05-09
著作权人	SEIKO EPSON CORP
专利号	JP1988104391A
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 make it possible to use low-power laser by lowering an amplitude of a high frequency current so that the minimum of a laser driving current is not below a threshold value of laser oscillation current. CONSTITUTION:When only a direct current flowing from a d-c power source 5 is used as a laser driving current, semiconductor laser power is also obtained. A high-frequency current generated by an oscillator 2 is superposed on the d-c current and used as a laser driving current, so that a state of laser beam power is always changing. Beams generated from the semiconductor laser are changed into parallel beams by a collimator lens 6 and next focused on a light record medium by an object lens 7 and read/written as information. Because the high-frequency current is cut off by a coil 4, the high-frequency current does not have direct effects on the d-c power source. The d c component is cut by a capacitor 3 so as to have no effect on the oscillator.
公开日期	1988-05-09
申请日期	1986-10-21
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/68895]
专题	半导体激光器专利数据库
作者单位	SEIKO EPSON CORP
推荐引用方式 GB/T 7714	OTSUKI NORIYOSHI. Semiconductor laser driving device. JP1988104391A. 1988-05-09.

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