一种大面积高能激光光束参数的在线测量方法
On-line parameters measurement method for high energy laser with large beam profile
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摘要: 提出了一种大面积连续波高能激光光束参数的在线测量方法——环形光刀扫描测量法。该方法采用偏心安装的斜面环形光刀高速扫描反射，光电探测器阵列沿反射光圆周均匀布置探测，使得绝大部分被测激光沿原光路传播，只有少量取样光被反射到探测器阵列上。通过对采集得到的探测器响应信号进行空间映射计算和图像复原，得到激光束的光强分布参数。该方法可用于光束直径数百mm的高能激光光束测量，测量空间分辨率约2 mm，时间分辨率为30~50 ms。Abstract: A novel on-line measurement method for continuous wave high energy laser beam is presented. The system based on this method is mainly consisted of a scanning circular reflector and a photoelectric detector array disposed along the circumference of the pan. The laser beam passing through the system except a little sample light is reflected into the detector array. Through the arithmetic of spatial mapping and image restoration with the output signal of detector array, the spatial-temporal distribution of the laser beam parameters is obtained. This method can be used to measure the high energy laser beam on-line with several hundred micrometers in diameter. The spatial resolution is 2 mm and the temporal resolution is 30~50 ms.
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