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本文在分析了均匀掺杂分布式光纤放大器（d－EDFA）的基础上，提出了沿传输方向掺杂浓度单调下降（单变），和降升结合（两变）的两种渐变型分布式光纤放大器，并用传输方程研究了透明传输和最佳掺杂浓度下，受激喇曼散射对均匀、单变和两变型三种d－EDFA的各种特性的影响．
Based on the analysis of the d-EDFA with uniform doping, two kinds of graded distributed doping (monotonically decreasing) (doping) and descending combination The effects of stimulated Raman scattering on the properties of three kinds of d-EDFA, ie uniform, single-variable and two-variable, were studied by using transmission equations.