串级结构Z扫描特性的分析

Analysis on Z-scan characteristics of cascade structure

对非线性介质串级结构的Z扫描特性进行了分析 ,分别给出了解析解和数值解 .解析分析主要是基于高斯分解方法 (GDM)和分布透镜方法的组合 ;数值分析采用了Crank_Nicholson有限差分方法和快速汉克尔变换方法(FHT) .同时 ,也给出了这两种数值分析的使用条件和方法 .将解析结果、数值结果和实验结果进行了比较 。

In this paper, Z_scan characteristics of the cascade structure of nonlinear media are analyzed, analytic and numerical solutions are obtained. Analytic analysis is based on the combination of Gaussian decomposition method (GDM) with the distributed lens method, and numerical calculation is based on the Crank_Nicholson finite difference scheme and fast Hankel transformation. Meanwhile, the conditions and method to apply these two numerical analyses are also given. Comparing analytic solutions with numerical calculation and experimental results, it is shown that they agree very well with each other.