密集波分复用石英光纤通信系统中受激Raman散射的稳态分析模型

THE ANALYTICAL MODEL OF SRS IN SINGLE-MODE SILICA FIBER IN DENSITY WAVELENGTH DIVISION MULTIPLEXED OPTICAL COMMUNICATION SYSTEM

假设石英光纤的Raman增益谱为线性谱 ,并给出了拟合直线 .以此为基础 ,得到了前向N信道受激Raman散射稳态耦合波方程的解析解 .这个解析解是在考虑了N个信号光之间串话下得到的 ,它适用于任意功率大小的信号光和任意信道间隔排列的情况 .N个信号光在石英光纤中经过受激Raman散射作用后 ,具有以下特点 :在传输过程中 ,任意两信道的信号光光子通量的比值随光纤的有效互作用长度、总的输入光子通量和两信道频率间隔按指数规律变化 .解析解与数值解进行了比较 ,两者取得了很好的一致 .

Assuming that the Raman gain profile of silica is a linear function, the authors have given analytic solutions of N channel stimulated Raman scattering (SRS) steady\|state coupling wave equation. Considering the SRS cross coupling among the N channels, the analytic solutions are applicable to systems with arbitrary channel separation and input light power. Theory shows, that the ratio of photon fluxes between arbitrary two channels is a base\|e exponential function of the effctive fibre length, the total input photon fluxes, and the Raman gain coefficient between the two channels. Finally, the analytic solution is compared with the numerical one, both are in good agreement with each other.