匹配高斯光束在双光子光折变介质中的自偏转

为了研究有外加电场的双光子光折变介质中匹配高斯光束的动态演化及自偏转特性,采用数值模拟的方法,给出了匹配高斯光束在晶体中的动态演化及自偏转图形。结果表明,对于给定的与双光子光折变介质参量匹配的高斯光束,在介质中能演化为稳定的孤子波;考虑扩散效应之后,匹配高斯光束的光束中心将发生自偏转;随着外加电场的增加,高斯光束的自偏转程度增加,当外加电场达到一定强度后,高斯光束的自偏转程度随着外加电场的增加反而减小;高斯光束的自偏转程度随着入射光强的变化关系与外加电场的情况相似。

Self-deflection of matching Gauss beam in two-photon photorefractive media

Dynamical evolution and self-deflection of matching Gaussian beam in two-photon photorefractive media with external electric field is numerically investigated. The resulted obtained indicates that, for a given two-photon photorefractive crystal, a Gaussian beam which matches with its parameters can evolve into steady-state solitary wave. The diffusion effect can cause self-deflection for the matching Gauss beam. The degree of self-deflection of matching Gauss beam is increasing when external electric field to grow in intensity. At an extent of external electric field, the degree of self-deflection is decreasing when external electric field to grow in intensity. The relation of the degree of self-deflection of matching Gauss beam and the intensity of incidence light is similar to external electric field.