三阶色散下的自傅里叶孤子与标准孤子相互作用

Interaction between self-Fourier soliton and standard soliton with third-order dispersion

对一阶自傅里叶孤子与一阶标准孤子光信号在光纤中传输的相互作用特性进行了数值模拟研究。所用方法为算法内部不存在理论误差的分步傅立叶变换法。结果表明:同为一阶孤子,若振幅不同,三阶色散效应导致的线性延时性不同,振幅越大,延时越多;孤子的近程相互作用会进一步改变孤子的群速度,甚至可以依据两孤子的先后排列方向而决定减速还是增速。

The interaction between one-order self-Fourier soliton and one-order standard soliton signal in optical fibers was studied numerically.The method used are split-step Fourier transform method.There is not any theoretical error in the inner part of algorithm in the method.The results show that if the two solitons have the same one-order and different amplitudes,third order dispersive effect induce the different time delay.The short range interaction of soliton further changes group velocity of soliton.Solitons are accelerated according to their orientation.