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Ｍ￣２因子与光束质量评定华仁忠，梁培辉（中国科学院上海光机所）长期以来，在激光光束质量的测量与评定上存在着一定的不确定因素，不同的测量方法和评估标准得出的结论相差较大，这是由于实际光束的复杂性造成的。图１描述了几种不规则光束沿传播方向ｚ在两个正交平面...
M ~ 2 Factor and Beam Quality Evaluation Huaren Zhong, Liang Peihui (Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences) For a long time, there are some uncertainties in the measurement and evaluation of laser beam quality. Different measurement methods and evaluation criteria The conclusion is quite different, due to the complexity of the actual beam. Figure 1 depicts several irregular beams along the propagation direction z in two orthogonal planes.