Measurement of laser diode astigmatism
Measurement of laser diode astigmatism
复制标题
激光二极管像散的测量
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
Haiyi Sun
中科院分区：
文献类型：
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作者：
Haiyi Sun
对两种常用的半导体激光器像散测量方法：移动二极管法和移动轮廓仪法进行了理论和实验研究。这两种方法都使用透镜来聚焦激光束，并使用照相机（或光束轮廓仪）来定位聚焦光束的焦点。理论上表明，当二极管和透镜之间的距离远大于透镜的焦距并且照相机位于与透镜相应的距离处时，移动二极管法是有效的，并且在测量中几乎不需要计算。理论和实验表明，当测量数据经过高斯光学精细处理后，移动轮廓仪法是有效的，而以前用几何光学处理测量数据的方法是错误的。
Theoretical and experimental studies are presented on the two commonly used laser diode astigmatism measurement methods: the moving-diode method and the moving-profiler method. Both methods use lens(es) to focus the laser beam and a camera (or beam profiler) to locate the focal point of the focused beam. It is theoretically shown that the moving-diode method is valid when the distance between the diode and the lens is much larger than the lens focal length and the camera is positioned at a corresponding distance to the lens, and that virtually no calculation is required in a measurement. It is theoretically and experimentally shown that the moving-profiler method is valid when the measured data are elaborately processed using Gaussian optics and that the previous measurement with the measured data being processed by geometric optics was wrong.