厄米-高斯光束在饱和非线性介质中的传输特性  

Propagation characteristics of Hermite-Gaussian beam in saturable nonlinear media

作　　者：姜其畅[1] 苏艳丽[1] 聂合贤[1] 马紫微[1] 李永宏[1] JIANG Qichang;SU Yanli;NIE Hexian;MA Ziwei;LI Yonghong(Department of Physics and Electronic Engineering,Yuncheng University,Yuncheng 044000,China)

机构地区：[1]运城学院物理与电子工程系,运城044000

出　　处：《激光技术》2018年第1期141-144,共4页Laser Technology

基　　金：山西省自然科学基金资助项目(2011011003-2)

摘　　要：为了研究厄米-高斯光束在光折变饱和非线性介质中的传输特性,采用有限差分方法数值求解了光波演化方程,理论分析了厄米-高斯光束的传输特性。结果表明,1维1阶、2阶和3阶厄米-高斯光束在光折变非线性介质中传输时,在合适的非线性条件下,均可以形成呼吸模式的孤子;随着非线性的加大,厄米-高斯光束的光场分量之间的相互分离趋势将逐渐变弱,同时,每个光场分量的振幅起伏效应会更加明显;改变厄米-高斯光束的入射位置、入射角度对其传输特性没有影响;2维厄米-高斯光束的传输特性和1维情况是类似的。厄米-高斯光束的这些特性在光开关领域有一定的应用前景。In order to study propagation properties of Hermite-Gaussian beams in photorefractive saturable nonlinear media,finite difference method was used to solve the evolution equation of light wave numerically and analyze the propagation properties of Hermite-Gaussian beams theoretically.The results show that,under suitable nonlinear conditions,1-D Hermite-Gaussian beams of 1-order,2-order and 3-order can form the solitons in respiratory mode during the propagation in photorefractive nonlinear media.With the increase of nonlinearity,the separation tendency among light field components of Hermite-Gaussian beams would become weaker.At the same time,the amplitude fluctuation effect of each light field component would be more obvious.The changes of incident position and incident angle of Hermite-Gaussian beams have no influence on its propagation characteristics.The transmission characteristics of 2-D Hermite-Gaussian beams are similar to those of 1-D.These properties of Hermite-Gaussian beams have certain application prospects in the field of optical switching.

关 键 词：非线性光学 厄米-高斯光束 光折变效应 空间孤子 

分 类 号：O437.5[机械工程—光学工程]