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。
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.
出处
《光学技术》
CAS
CSCD
北大核心
2010年第2期279-284,共6页
Optical Technique
基金
基金项目：山西省高等学校科技开发项目（200611042）资助课题
