高能激光光束质量β因子测量方法
Measurement method of beam quality factor β for high energy laser
-
摘要: 高能激光光束质量β因子测量装置主要用于强激光系统状态调试和综合性能参数诊断，用于评价激光系统出光性能以及远场光斑可聚焦的能力。论文针对接近衍射极限光束质量β因子测量过程中被测光斑在面阵相机上所占的像素点太少等缺陷，研究了采用聚焦显微放大与高精度扫描狭缝相结合的光束质量β因子测量方法，并对相关方案进行了分析计算。此外论文设计了采用固定像差元件及平行光管光源组合的激光光束质量β因子测量结果验证方案，对研制的高能激光光束质量β因子测量装置进行了不确定度分析，测量不确定度优于10%。Abstract: The high energy laser beam quality factor measurement system is used for state debugging as well as comprehensive performance parameters diagnosis of laser system, while these parameters can evaluate the laser output performance and the far-field spot focusing ability of the laser system. Aiming at the defect that the beam quality factor close to the diffraction limit occupies too few pixels in the area array detectors, a measurement method was proposed based on microscopic magnification with scanning slit. In addition, a verification scheme using the combination of fixed phase and colimator light source was designed to verify beam quality factor accuracy, the scheme proves the measurement uncertainty of our device is less than 10%.
下载: