激光远场焦斑测试技术的实验研究

Experimental investigation in far-field test technique for high power laser output

实验研究了激光远场焦斑能量分布测试的三种方法(长焦距透镜法、列阵相机法、RattlePair法),对三种测试方法得到的实验数据进行了比对,系统地分析了每种方法的优缺点。结果表明,采用长焦距透镜与一对微楔角劈板组合测试激光远场焦斑的方法更具优势,可减少测试系统引入的像差,并使图像处理过程得到简化。

In experiment, three systems were designed to measure the energy distribution of the laser beam in the far field. Under the same conditions, the far field of the laser beam was measured independently by three instruments: long focus lens, rattle pair and multipleimage cameras. After compare and analyze the results, a new system was put forward in which a long focus lens with a pair of smallangle wedge was used. It only needs corresponding data processing for a focalspots line which was on the focal plane. The new system satisfied requirement for aberration and predigested image data processing.