波分复用孤子系统中孤子碰撞特性研究

Investigation of Collision Properties of Solitons with Different Wavelengthes in Soliton WDM System

从耦合非线性薛定谔方程组出发,利用对称分步傅里叶方法,对波分复用孤子系统中两个不同波长孤子间的相互碰撞特性进行了数值研究。结果表明,碰撞会导致孤子脉冲的瞬间速度发生变化,孤子中心频率还将发生偏移,而且频率偏移量的大小与孤子的相对速度有关。

Based on coupled nonlinear Schrodinger equations, an investigation of the collision between two solitons with different wavelengthes in soliton wavelength multiplexed （WDM） system is carried out by making use of symmetrical slit-step numerical method. It shows that the collision will cause an immediate change in the instan speed of soliton pulse, as well as a shift in the central frequency, and the quantity of this relevant to the speed difference between the two solitons.