用空间频率参量研究激光束特性

The study of laser beams in spacial frequency domain

本文提出了一种新的方法,用空间频率参量解亥姆霍兹微分方程来获得激光束特性的解析数学描述,并从空间频率参数出发定义了光束束散角和激光束腰斑最小极限值。与用衍射积分方程所得解相比较,结果一致。

The Helmholtz equation is solved in the spacial frequency domain to obtain the analytic mathematical description of laser beams. The minimum limit of the beam divergence and beam waist are determined in term of spacial frequency parameters.