有界非局域非线性介质中空间光孤子传输的研究  

Investigation of propagation of spatial soliton in nonlocal nonlinear medium of finite-size

作　　者：梁炎斌[1] 郑亚建[1] 杨平保[1] 曹龙贵[1] 陆大全[1] 胡巍[1] 郭旗[1] 

机构地区：[1]华南师范大学光子信息技术广东省高校重点实验室,广州510006

出　　处：《物理学报》2008年第9期5690-5698,共9页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10674050);高等学校科技创新团队项目(批准号:06CXTD005)资助的课题~~

摘　　要：对有界非局域非线性介质边界对孤子传输的影响进行了研究.基于非局域非线性薛定谔方程以及热传导的泊松方程,采用格林函数法求出了强非局域介质铅玻璃的响应函数和临界功率;从光线方程出发得到了偏离材料中心入射的光束中心振荡轨迹以及周期的解析解.通过数值模拟证明了该结果在不靠近样品边界的范围内都是准确的.In this paper, we investigate the effect of the boundary of the nonlocal nonlinear medium on the propagation of soliton. On the basic of NNLSE and the Poisson equation, using the Green function approach, we obtain the response function of the lead glass of finite-size, which is a strong nonlocal medium. Starting with the paraxial ray equation, we obtain the analytical solutions of the oscillation trajectory and period of the beam. Comparing the analytical solutions with numerical simulations, we found that our analytical solutions are precise when the point of incidence is not near the boundary of the medium.

关 键 词：空间光孤子 铅玻璃 非局域非线性 

分 类 号：O437[机械工程—光学工程] TN929.11[理学—光学]