双光子亮屏蔽光伏空间孤子的自偏转特性  

Self-deflection of two-photon bright screening-photovoltaic spatial solitons

作　　者：苏艳丽[1] 姜其畅[1] 吉选芒[1] 

机构地区：[1]运城学院物理与电子工程系,山西运城044000

出　　处：《量子电子学报》2010年第3期331-335,共5页Chinese Journal of Quantum Electronics

基　　金：山西省高等学校科技开发项目基金(200611042)资助课题

摘　　要：基于外加电场的双光子光伏光折变介质,数值研究了光折变介质中亮屏蔽光伏孤子的自偏转特性。结果表明:考虑扩散效应后,双光子亮屏蔽光伏孤子的中心沿一个抛物线轨迹在晶体光轴的反向上产生自偏转;孤子中心偏转距离首先随着外加电场的增加而增加,当外加电场增加到某一特定值后,孤子的自偏转距离随着外加电场的继续增加反而减小。亮孤子自偏转距离随着入射光强的增加也表现出先增加后减小的非线性变化规律。在一定参量下,对双光子模型与单光子模型的自偏转特性做了简单比较。The self-deflection characteristics of bright screening-photovoltalc spatial solitons （SPSS） in biased two-photon photovoltalc photorefractive media were studied numerically. The results show that two-photon bright SPSS possesses a self-deflection process in the direction opposite to the crystal＇s c axis during propagation and the center of the bright solitary beam moves on a parabolic trajectory. The self-deflection distance of the bright soliton increases, reaches its maximum value at a certain external electric field, and then decreases as the external electric field increases. The relation of self-deflection distance of bright solitons and incidence light intensity is also nonlinear, which is similar to that of external electric field. Moreover, the self-deflection of two-photon and single-photon models is compared at certain parameters.

关 键 词：非线性光学 双光子光折变效应 屏蔽光伏孤子 自偏转 

分 类 号：O437[机械工程—光学工程]