为了操控在非线性克尔介质中传输的光孤子, 以薛定谔方程为模型, 采用分步傅里叶数值模拟的方法, 分别研究了在非线性自聚焦克尔介质中添加高斯势垒、高斯势阱、Scarf-Ⅱ势垒(阱)和周期势垒(阱)后, 光孤子在非线性克尔介质中的传输情况.通过改变势垒(阱)的高度(深度)、高斯势垒(阱)和Scarf-Ⅱ势垒(阱)的宽度, 或者周期性势垒的周期, 可实现对光孤子的操控.随着参数取值的不同, 光孤子在传输中出现了反射、隧穿、周期性摆动、直线传播、分裂、光强增大等不同的现象.研究结果可为光开关和光控光技术提供参考.

In order to control solitons in Kerr medium, based on Schrodinger equation, the optical soliton transmission in nonlinear self-focusing Kerr medium, after adding Gaussian-type potetial barrier, Gaussian-type potetial trap, Scarf-Ⅱ barrier (trap) and periodic potential barrier (trap), was studied by fast Fourier transform numerical simulation. The soliton can be controlled by changing the height (depth) of potential barrier (trap), the width of the gaussian-type barrier (trap) and Scarf-Ⅱbarrier (trap), or the period of the periodic potential barrier (trap). There are different phenomena in optical soliton transmission, such as tunneling, cyclical swings, linear transmission, division and so on, by selecting the different parameters. The study is available for cotrolling the soliton and optical switch and photocontrol.