中文摘要：

采用色散长度、非线性长度和增益系数作为自相似抛物脉冲光纤放大器的特征参量,用分步傅里叶方法数值模拟了输入超短脉冲在光纤放大器中的演化规律。研究了色散长度和非线性长度对脉冲自相似演化的影响,获得了放大器中脉冲实现自相似演化的条件。研究了增益系数对脉冲自相似演化的形成和放大传输的影响,发现增益系数可以影响脉冲的演化进程和结果。

英文摘要：

Using dispersion length,nonlinear length and gain coefficient as the characteristic parameters of self-similar parabolic pulse fiber amplifier,the evolution of the input pulse is numerical simulated by split- step Fourier method. The influences of dispersion length and nonlinear length on the pulse＇s self-similar evolution are studied,and the self-similar evolution conditions of the input pulse are obtained. The influence of gain coefficient on the pulse＇s self-similar evolution is also investigated, and the results show that gain coefficient can influence the pulse evolution process and result.