贝塞尔晶格中高斯光束的传输（英文）  

Propagation of the Gaussian Beam in Bessel Optical Lattices

作　　者：鄢曼 覃亚丽[1] 任宏亮[1] 李伽[1] 薛林林[1] 

机构地区：[1]浙江工业大学信息工程学院光纤通信与信息工程研究所,浙江杭州310023

出　　处：《激光与光电子学进展》2015年第2期211-214,共4页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61275124,60978010,61205121)

摘　　要：通过数值仿真研究了高斯光束在贝塞尔晶格中的传输特性,贝塞尔晶格是在光折变晶体中通过光诱导产生的。在有晶格和无晶格的情况下,高斯光束的传输特性有很大差别。高斯光束在均匀介质中传输时会呈现出线性衍射和自聚焦现象,当晶体中存在晶格时,光束可以克服光在均匀介质中的衍射和自聚焦效应,在不同的初始输入条件下,高斯光束在传输的过程中会演变成一个环形孤子或者圆形孤子。The numerical analysis of the dynamics of a Gaussian beam in Bessel lattices which are induced by transvering the focusing photorefractive nonlinearity crystal is presented. The propagation properties of the Gaussian beam can be different with and without the lattices. In the absence of the lattice, the beam will present linear diffraction and nonlinear focusing in a homogeneous medium. The beam can overcome these effects in a homogeneous medium after transfering in a crystal with lattices. With different initial input conditions in the case of lattices, the input beam can overcome these effects and form a ring-shaped soliton or a circle-shaped soliton.

关 键 词：非线性光学 高斯光束 贝塞尔晶格 光折变晶体 光孤子 

分 类 号：O734[理学—晶体学]