高阶耦合光伏空间孤子  

One type of high order coupled photovoltaic spatial solitons

作　　者：吴丹丹[1] 

机构地区：[1]华南理工大学南校区物理教学实验中心,广州510006

出　　处：《物理学报》2007年第6期3272-3278,共7页Acta Physica Sinica

摘　　要：采用数值模拟方法研究光折变晶体中的高阶耦合光伏空间孤子.该孤子可用包含两种频率的四束平行光入射到折射率改变为正的光折变晶体中形成.数值研究还发现,当入射光束为双曲正割光束时,在一定条件下可以模拟高阶耦合光伏空间孤子,而且,这种高阶耦合光伏空间孤子显示出光控光的特性.入射光束显著偏离左右对称会影响高阶耦合光伏空间孤子的实现.By numerical simulation we theoretically study one type of high order coupled photovoltaic spatial solitons that can be realized by using four parallel beams with two different frequency components in photovoltaic crystals whose light-induced refractive index perturbation is positive. The numerical results show that this kind of coupled soliton can be approached by hyperbolic secant beams under some suitable conditions. The optical steering properties of such a high order coupled soliton are investigated. It is shown that such a coupled soliton cannot be realized when the incident beams remarkably deviated from the lateral symmetry.

关 键 词：耦合光伏空间孤子 光控光 

分 类 号：O437[机械工程—光学工程]