单轴晶体中电磁高斯谢尔模型光束的二阶矩

Second-order moments of an electromagnetic Gaussian Schell-model beam in a uniaxial crystal.

作者信息

Shen Yan, Liu Lin, Zhao Chengliang, Yuan Yangsheng, Cai Yangjian

出版信息

J Opt Soc Am A Opt Image Sci Vis. 2014 Feb 1;31(2):238-45. doi: 10.1364/JOSAA.31.000238.

DOI:10.1364/JOSAA.31.000238

PMID:24562020

Abstract

We derive the analytical expressions for the second-order moments of an electromagnetic Gaussian Schell-model (EGSM) beam propagating in a uniaxial crystal. With the help of the derived formulas, we study the evolution properties of the propagation factor, the effective radius of curvature and the Rayleigh range of an EGSM beam in a uniaxial crystal. It is found that the evolution properties of an EGSM beam in a uniaxial crystal are much different from its evolution properties in free space and are closely determined by the initial beam parameters and the parameters of the uniaxial crystal. The uniaxial crystal provides one way for modulating the properties of an EGSM beam.

摘要

我们推导了在单轴晶体中传播的电磁高斯谢尔模型（EGSM）光束二阶矩的解析表达式。借助推导公式，研究了EGSM光束在单轴晶体中的传输因子、有效曲率半径和瑞利范围的演化特性。发现EGSM光束在单轴晶体中的演化特性与其在自由空间中的演化特性有很大不同，并且紧密地由初始光束参数和单轴晶体参数决定。单轴晶体为调制EGSM光束的特性提供了一种途径。