Semiconductor laser driving device

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	Semiconductor laser driving device
其他题名	Semiconductor laser driving device
	OTSUKI NORIYOSHI
	1988-05-09
专利权人	SEIKO EPSON CORP
公开日期	1988-05-09
授权国家	日本
专利类型	发明申请
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.
其他摘要	目的：通过降低高频电流的幅度，使激光器驱动电流的最小值不低于激光器振荡电流的阈值，可以使用低功率激光器。组成：当只有从d-c电源5流出的直流电流用作激光器驱动电流时，也可以获得半导体激光器功率。由振荡器2产生的高频电流叠加在d-c电流上并用作激光器驱动电流，从而激光束功率的状态总是在变化。由半导体激光器产生的光束由准直透镜6变成平行光束，然后由物镜7聚焦在光记录介质上并作为信息读/写。由于线圈4切断了高频电流，因此高频电流对d-c电源没有直接影响。 d c分量由电容器3切断，以便对振荡器没有影响。
申请日期	1986-10-21
专利号	JP1988104391A
专利状态	失效
申请号	JP1986250063
公开（公告）号	JP1988104391A
IPC 分类号	G11B7/125 \| H01S5/062 \| H01S5/068 \| H01S3/133
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	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[P]. 1988-05-09.

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