分析研究了采用分布式光纤喇曼放大器的 DWDM光纤传输系统中 ,瞬态泵浦消耗噪音对信号眼图、误码率等性能指标的影响 ,比较了不同比特率和信道数时这种噪音所带来的影响 ,给出了模拟仿真结果 ;分析并比较了瞬态泵浦消耗噪音与喇曼串扰噪音对系统性能影响的程度 ,同时分析了不同码型所对应的瞬态泵浦消耗噪音 ,发现归零码 ( RZ)具有更好的噪音特性 In the DWDM optical fiber transmission system using distributed fiber Raman amplifier, the influence of transient pump noise on the performance of signal eye diagram and bit error rate (BER) is analyzed and compared. When comparing the different bit rates and the number of channels, The influence of transient pump noise and Raman crosstalk noise on the performance of the system is analyzed and compared. At the same time, the transient pump consumption noise corresponding to different patterns is analyzed, Zero return code (RZ) is found to have better noise characteristics