Method and device for calculating nonlinear noise of Raman amplification scene

The invention relates to a method and a device for calculating nonlinear noise of a Raman amplification scene. The method mainly comprises the following steps: obtaining an equivalent in-fiber optical power spectrum of each channel according to a Raman coupling equation or obtaining an equivalent in-fiber optical power spectrum of each channel according to a Raman analysis equation; and calculating according to the equivalent incident optical power spectrum of each channel and related optical fiber parameters to obtain an equivalent nonlinear noise signal ratio of each channel, and finally obtaining an equivalent signal-to-noise ratio caused by nonlinearity in the Raman amplification scene. The method can solve the problems that a traditional model is too complex and a backward Raman amplification scene is difficult to solve, and is more practical. 本发明涉及一种计算拉曼放大场景非线性噪声的方法和装置。其方法部分主要包括：根据拉曼耦合方程得到各个信道的等效入纤光功率谱或根据拉曼解析方程得到各个信道的等效入纤光功率谱；根据各个信道的等效入纤光功率谱及相关的光纤参数进行计算，以得到各个信道等效的非线性噪声信号比，最终得到拉曼放大场景由非线性引起的等效信号噪声比。本发明可解决