光纤放大器用于补偿光信号在光纤中的传输损耗,是全光通信网中的核心器件.建立了光孤子在分布式光纤放大器中传输的物理模型,采用分步傅里叶变换法数值模拟了光孤子的传输放大特性,讨论了增益色散对光孤子形状和频谱的影响.结果表明:在放大器的反常色散区,随着光孤子的放大,会不断地产生啁啾孤子,孤子频谱会加宽并且产生振荡结构.放大介质的增益色散将会使光孤子幅度下降,宽度展宽,频谱窄化.因此,光纤放大器的色散、非线性效应和增益色散均会对光孤子的传输特性产生影响.
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