Characteristic measuring instrument for semiconductor laser

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	Characteristic measuring instrument for semiconductor laser
其他题名	Characteristic measuring instrument for semiconductor laser
	TAKANO YOSHIHIKO
	1988-10-04
专利权人	NEC CORP
公开日期	1988-10-04
授权国家	日本
专利类型	发明申请
摘要	PURPOSE:To enable radiation-angle to light-intensity to be accurately measured by providing a semiconductor laser driving circuit with an AC power supply in parallel to a DC power supply. CONSTITUTION:An instrument is added with an AC power supply 5 in parallel to a DC power supply Therefore, a driving current is composed of a DC bias superposed thereon with a micro-AC and light from a semiconductor laser 6 is modulated by the AC. On the other hand, a signal detecting circuit on a photodetector 7 side is provided with a capacitor 9 for cutting a DC component and taking out only an AC current and a capacitor 10 for removing the effect of a DC power supply 11 side. A signal is amplified 13 and the AC signal of the photodetector 7 is converted to a DC signal in an AC/DC converting circuit 14 to be inputted to the Y-axis terminal of an X-Y recorder 15. Thus, since only the AC signals due to a photoelectric current are taken out as the output of the photodetector 7 and there exists no DC component due to a dark current, an outputted waveform has sharp radiation-angle to light-intensity.
其他摘要	目的：通过提供一个与直流电源并联的交流电源的半导体激光器驱动电路，使光强度的辐射角能够被精确测量。组成：一台仪器增加了一个与直流电源1并联的交流电源5.因此，驱动电流由叠加在其上的直流偏压和微型交流电组成，来自半导体激光器6的光由半导体激光器6调制。 AC。另一方面，光电探测器7侧的信号检测电路设置有用于切断DC分量并仅取出AC电流的电容器9和用于消除DC电源11侧的影响的电容器10。信号被放大13并且光电检测器7的AC信号在AC / DC转换电路14中被转换成DC信号以输入到XY记录器15的Y轴端子。因此，由于仅有AC信号到期取出光电流作为光电探测器7的输出，并且由于暗电流不存在DC分量，输出的波形对光强度具有尖锐的辐射角。
主权项	-
申请日期	1987-03-26
专利号	JP1988238473A
专利状态	失效
申请号	JP1987073214
公开（公告）号	JP1988238473A
IPC 分类号	G01R31/26 \| G01M11/00 \| H01S5/00 \| H01S3/18
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/181661/62610
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	TAKANO YOSHIHIKO. Characteristic measuring instrument for semiconductor laser. JP1988238473A[P]. 1988-10-04.

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