放大自发辐射(ASE)是影响低重复频率高峰值功率高能量脉冲光纤放大器性能的主要因素。系统综述了脉冲光纤放大器中抑制ASE的主要方法, 包括滤波、优化抽运特性(抽运功率、后向抽运、抽运方式)及优化种子特性(信号功率、信号脉宽)。对各种方法的抑制效果进行了比较, 发现滤波和同步脉冲抽运是抑制ASE、获得高峰值功率高能量脉冲输出的重要技术手段。

Amplified spontaneous emission (ASE) is one key factor influencing the performance of high-peak-power high-energy pulsed fiber amplifiers with low repetition rate. The main methods used for ASE suppression in pulsed fiber amplifiers, including filtering, optimization of pump characteristics (pump power, backward pumping, and pumping schemes), and optimization of seed characteristics (signal power and signal pulse width) are reviewed. The suppression effect comparison among the above methods indicates that, filtering and synchronous pulse pumping are major technical means to suppress ASE and to achieve high-peak-power high-energy pulse outputs.