通过引入广义损耗系数的概念,给出了计算机模拟光纤拉曼放大器(FRA)的一种新算法。该算法不用假设抽运光和信号光衰减系数相同,且可大大增加饱和放大状态下的迭代步长。用于光纤拉曼放大器增益、噪声系数等的数值模拟时,可在保证精度的同时显著缩短迭代时间。模拟结果与已有文献的实验数据相吻合 By introducing the concept of generalized loss coefficient, a new algorithm of computer simulation of fiber Raman amplifier (FRA) is given. The algorithm does not need to assume that the pump light and signal light attenuation coefficient of the same, and can greatly increase the saturation amplification state iteration step. For numerical simulation of fiber Raman amplifier gain, noise figure, etc., the iteration time can be significantly shortened while maintaining the accuracy. The simulation results are consistent with the experimental data of the existing literature