A novel method for power-in-the-bucket (PIB) measurement of high power laser beams is proposed. The laser beam spot was first sampled by a rotating involute pinhole array and then collected by using a photodetector placed behind the pinholes. The spatial–temporal distribution and calibrated PIB curve of the laser beam can be obtained. The spatial and temporal resolution is 20 µm and 5 ms, respectively. Compared with conventional methods, the proposed measurement method is simple, convenient, and accurate, which is suitable for high power laser beams with jitter.

中文翻译：

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渐开线针孔阵列大功率激光光束质量测量

提出了一种用于高功率激光束的桶中功率 (PIB) 测量的新方法。激光束光斑首先通过旋转渐开线针孔阵列进行采样，然后使用放置在针孔后面的光电探测器进行收集。可以获得激光束的时空分布和校准的 PIB 曲线。的空间和时间分辨率为20 μ m和5毫秒，分别。与传统方法相比，所提出的测量方法简单、方便、准确，适用于具有抖动的大功率激光束。