为了研究高阶色散对光孤子及孤子对传输的影响,采用分步傅里叶变换方法,对含高阶色散效应与不考虑高阶色散情况下的光孤子非线性薛定谔方程进行了数值求解,得到了孤子脉冲形状与色散阶数有着相关性这一结果。结果表明,奇数阶色散效应会使孤子及孤子对脉冲发生单边振荡,产生能量损耗,并在振荡侧产生次脉冲,而偶数阶色散效应会使孤子及孤子对脉冲发生明显的脉宽展宽,高阶色散效应对孤子脉冲的影响随阶数的增加而减弱。

In order to study the effect of high-order dispersion on propagation of optical soliton and soliton couple,based on the split-step Fourier transform method,the optical soliton nonlinear Schrdinger equations with and without high-order dispersion effect were numerically calculated.It is found that the soliton pulse shape is correlative with the dispersion order.The odd-number-order dispersion effect can cause the soliton and the soliton couple to oscillate at a single side with a loss of energy,and the sub pulse can be produced at the oscillating side.While the even-number-order dispersion effect can make the pulse width extended.The effect of the high-order dispersion would be weakened with the increase of the order number.