通过微扰理论求得非线性薛定谔方程(NLSE)的时域半解析解,在非线性效应增大的情况下提出了优化微扰方法(MPM),并在多跨距非线性光纤链路中与原微扰方法(PM)进行了对比仿真研究。研究结果表明,优化微扰方法在非线性效应增强的情况下精确度明显高于原微扰方法,同时又不失其半解析模型,为研究大功率长距离传输的光纤通信系统提供了新的方法。

A time-domain semi-analytical solution of nonlinear Schrdinger equation (NLSE) was obtained by using perturbation method (PM). And a modified perturbation method (MPM) was brought forward with the increase of nonlinearity. The numerical simulations of its applications in a high-speed nonlinear fiber-optic system,which is made up of multi-span each including one transmission fiber,one dispersion compensation fiber and an erbium doped fiber amplifier,proves that the MPM give a more precise semi-analytical solution of NLSE,which provides a novel solution to study the high-speed long-haul fiber-optic system.