Laser light source for plural beams

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	Laser light source for plural beams
其他题名	Laser light source for plural beams
	ITO MASATAKA
	1986-10-30
专利权人	NEC CORP
公开日期	1986-10-30
授权国家	日本
专利类型	发明申请
摘要	PURPOSE:To obtain a stable laser light source for plural beams by providing a feedback circuit for resetting an optical output to a value which is set in advance, on at least one driving circuit of a semiconductor laser. CONSTITUTION:An optical output P of a semiconductor laser 21 is adjusted by a voltage V1 of one input terminal 25 of a differential amplifier 23, and voltages of an output terminal 24 of the amplifier and the other input terminal 26 become V0 and V1, respectively. In such a state, the optical output of the laser 21 whose threshold current is varied by the adjacent semiconductor laser or a disturbance such as an ambient temperature variation, etc. is varied to P+DELTAP, and an optical power which is made incident on a monitor use detector 22 is also varied. In accordance with it, the voltage of the input terminal 26 of the amplifier 23 goes to V1+DELTAV. This amplifier 23 is operated so that the voltage of the terminal 26 becomes V1, and the voltage of the terminal 24 becomes V0-DELTAV. Accordingly, the optical output of the laser 21 is reset to the value P, the optical power which is made incident on the detector 22 also goes to an initial state, and the optical output P of the laser 21 is maintained stably.
其他摘要	目的：通过在半导体激光器的至少一个驱动电路上提供用于将光输出重置为预先设定的值的反馈电路，为多个光束获得稳定的激光光源。组成：半导体激光器21的光输出P由差分放大器23的一个输入端25的电压V1调整，放大器的输出端24和另一输入端26的电压分别变为V0和V1。。在这种状态下，由相邻的半导体激光器改变阈值电流的激光器21的光输出或诸如环境温度变化等的干扰变为P + DELTAP，并且入射的光功率监视器使用检测器22也是变化的。据此，放大器23的输入端26的电压变为V1 +ΔV。操作该放大器23使得端子26的电压变为V1，并且端子24的电压变为V0-ΔV。因此，激光器21的光输出被重置为值P，入射在检测器22上的光功率也进入初始状态，并且激光器21的光输出P被稳定地保持。
主权项	-
申请日期	1985-04-20
专利号	JP1986243957A
专利状态	失效
申请号	JP1985084772
公开（公告）号	JP1986243957A
IPC 分类号	G11B7/125 \| G11B7/14 \| H01S5/00 \| 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/181661/59413
专题	半导体激光器专利数据库
作者单位	NEC CORP
推荐引用方式 GB/T 7714	ITO MASATAKA. Laser light source for plural beams. JP1986243957A[P]. 1986-10-30.

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