复射线近轴近似原理和应用

COMPLEX RAY PARAXIAL APPROXIMATION: PRINCIPLE AND APPLICATIONS

本文基于复射线理论和微扰原理,发展了一种近轴近似计算方法,可大大简化波场问题的求解过程.将场量表达式中的波源坐标及传播空间解析地延拓到复数域,可以十分方便地获得聚束波场量表达式.根据复射线理论,在图1所示结构中。

Complex ray tracing provides an efficient approach to dealing with the propagation and scattering of HF Gaussian-like beams, but the search for the ray path from source to observer is the most time-consuming part in the numerical implementation of the complex ray scheme. Based on the complex ray theory and the perturbation principle, an approximation method for the evaluation of beam fields in the paraxial region is developed, which simplifies the computation substantially, The theory and procedure of the method are presented and some application examples and numerical results are given.