匹配高斯光束在双光子光伏光折变介质中的自偏转

Self-deflection of Matching Gauss beam in Two-photon Photovoltaic Photorefractive Media

通过数值模拟的方法,研究了无偏压双光子光伏光折变介质中匹配高斯光束的动态演化及自偏转特性.结果表明,对于给定的与双光子光伏光折变晶体参量匹配的高斯光束,在晶体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.高斯光束的自偏转程度首先随入射光强的增加而增加,当光强达到一定程度后随着入射光强的增加偏转程度反而减小.

Dynamical evolution and self-deflection of matching Gaussian beam in two-photon photovohaic photorefractive media without external electric field is numerically investigated. The result indicates that, for a given two-photon photovohaic 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 incidence light to grow in intensity. At an extent of incidence light, the degree of self-deflection is decreasing when incidence light to grow in intensity.