非局域非线性介质中的非傍轴空间光孤子  

Nonparaxial Spatial Optical Solitons in the Nonlocal Nonlinear Media

作　　者：陈继龙[1] 石智伟[1] 李华刚[2] 

机构地区：[1]广东工业大学信息工程学院,广东广州510006 [2]广东第二师范学院物理系,广东广州510303

出　　处：《中国激光》2014年第3期25-28,共4页Chinese Journal of Lasers

基　　金：中国博士后基金(2013M531822);广东省自然科学基金(S2012040007188)

摘　　要：空间光孤子在非线性光学中占有非常重要的地位,而大多数理论都是在傍轴条件下得到的,无法满足初始光束大角度入射情况的应用。利用亥姆霍兹理论研究了非局域非线性介质中的一维非傍轴空间光孤子。在强和弱非局域的两种情况下,得到了非局域非线性非傍轴方程的精确解析解。通过数值研究发现非局域程度可以影响孤子的束宽,但不影响其稳定性。反之,非傍轴系数可以影响孤子稳定性,但不影响其宽度。Spatial optical solitons in nonlinear optics occupy a very important position, while most of the theories are obtained under paraxial constraints, and can not meet the application under the condition of the large incident angle of the initial beam. One-dimensional nonparaxial spatial optical solitons in nonlocal nonlinear media using Helmholtz theory are investigated. An exact analytical solution to the nonlocal nonlinear nonparaxial propagation equation in the cases of high and weak nonlocalities is deduced. It＇s numerically found that the degree of nonlocality can affect the widths of nonlocal soliton beams, but has no effect on their stabilities. Contrarily, nonparaxiality can affect their stabilities, but has no effect on their widths.

关 键 词：非线性光学 非傍轴 非局域 稳定性 

分 类 号：O473[理学—半导体物理]