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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。
The perturbation theory is used to obtain the time-domain semi-analytical solution of the nonlinear Schrödinger equation (NLSE). An improved Perturbation Method (MPM) is proposed when the nonlinear effect increases. In the multi-span nonlinear optical fiber link And the original perturbation method (PM) conducted a comparative simulation study. The results show that the proposed method is more accurate than the original perturbation method under the condition of enhanced nonlinearity without losing its semi-analytical model, which provides a new method for studying optical fiber communication systems with high power and long distance transmission method.