高斯光束在有外电场的双光子光伏光折变材料中的演化

吉选芒; 刘劲松

光学技术, 2010, 36 (2): 279, 网络出版: 2011-02-21

高斯光束在有外电场的双光子光伏光折变材料中的演化

Evolution of Gauss beam in biased two-photon photovoltaic photorefractive media

论文大纲

吉选芒 ^1,*刘劲松 ²

作者单位

¹ 山西运城学院物理与电子工程系, 山西运城 044000

² 华中科技大学光电子科学与工程学院, 湖北武汉 430074

非线性光学高斯光束双光子光伏光折变材料演化相互作用 nonlinear optics Gauss beam two-photon photovoltaic photorefractive materials evolution

摘要

为了得到一束高斯光束和两束高斯光束的相互作用在有外电场的双光子光伏光折变材料中的演化结果, 将高斯光束作为入射波,采用数值方法求解波传播方程。研究结果表明: 在外加电场、光强峰值分别与晶体参量匹配的情况下, 一束高斯光束能演化为稳定的屏蔽光伏明孤子, 而在不匹配时,一束高斯光束在传播过程中则呈现周期性压缩或膨胀现象。同时也发现: 在作用距离范围内, 同相位的两高斯光束相互吸引, 并伴随有融合现象；而相位相反的两高斯光束相互排斥, 且其排斥作用随着光束初始间距的减小而增加, 当两高斯光束的相位差位于区间(0, π)和(-π,0)时, 其相互作用过程中伴有能量的转移, 两区间中能量转移方向相反。

Abstract

In order to obtain results of the evolution of a Gauss beam and interaction of two Gauss beams in two-photon photovoltaic photorefractive materials by applied electric filed ,the beam propagation equation is solved numerically with the Gauss beam taken as the input wave.The result shows that a Gauss beam can evolve into steady-state screening-photovoltaic bright soliton when the applied electric filed and intensity peak value watch with the photorefractive crystal respectively,or will experience cycles of compression and expansion when don’t watch. It is also found that two same-phase beam attract each other and beam fusions do occur at certain interaction length, while in the case of anti-phase ,the two beams repel each other with a force decreasing monotonously with the initial separation.. when the relative phase between the two Gauss beam falls within the ranges of (0, π)and (-π,0),energy transfer will accompany the interactions.

参考文献

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吉选芒, 刘劲松. 高斯光束在有外电场的双光子光伏光折变材料中的演化[J]. 光学技术, 2010, 36(2): 279. JI Xuan-mang, LIU Jin-song. Evolution of Gauss beam in biased two-photon photovoltaic photorefractive media[J]. Optical Technique, 2010, 36(2): 279.

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