宽带Te基掺Er光纤放大器饱和增益谱特性研究

Studies on the Saturated Gain Spectrum of Erbium-doped Tellurite-based Optical Fiber Amplifier

对波分复用(WDM)系统中宽带Te基掺Er光纤放大器(EDTFA)饱和增益谱特性进行了理论研究,研究依据均匀加宽四能级模型下的速率方程组和光功率传输方程组,采用龙格 库塔法数值模拟。研究结果表明,在给定泵浦方式、泵浦功率和光纤长度的饱和工作状态下,多个信道同时输入时的EDTFA增益谱依赖于输入的信道数和信道功率,且各个信道增益要低于相同输入功率下单个信道的增益,同时增益谱宽变窄,增益谱峰随饱和程度的加深向长波长方向偏移。

Based on the rate equations and light power propagation equations of homogeneously broadened four energy-level sysem,which are solved using Runge-Kutta algorithm,the characterization of the saturated gain spectrum for erbium-doped tellurite-based fiber amplifier(EDTFA) in WDM system was presented theoretically.The numerical simulation results show that the multi-channel gain spectrum is determined by the input channel numbers and signal power when the pumping configuration,pumping power and fiber length are given,and its each channel gain is lower than that of single channel with the same input power;Moreover,with the increasing saturation,the multi-channel gain bandwidth of the EDTFA is becoming shorted,and the gain peak shifts to the longer wavelength band.