broad beam absorption

The generalized M 2 factor of rotationally symmetric truncated beams is studied in detail by using the asymptotic analysis, generalized truncated second-order moments method and self-convergent beam width approach.

使用渐近分析法、广义截断二阶矩法和自收敛束宽法研究了旋转对称截断光束的广义M2 因子 ,分析了这三种方法的物理联系以及如何惟一确定广义M2 因子问题 ,并用数值计算结果做了说明 。