Abstract. An improved model of erbium–ytterbium codoped fiber amplifier (EYDFA) considering the effects of radiation is proposed. In this model, terms of radiation-induced losses are introduced into power propagation equations, combined with the simplified rate equations to simulate radiation effects on EYDFA performances related to space missions. A method for recovering background losses and radiation-induced losses of EYDFA is illustrated. Numerical simulation tools are based on a homemade particle swarm optimization procedure. In the experimental aspect, two amplifiers of the same type were irradiated with Co60 gamma rays up to a total dose of 10 and 50 krad, respectively. Compared with the experimental data, the curve of output power drawn by the model is in good agreement with the experimentally measured values, validating the validity of the theoretical model. Using this method that combined experimental testing of online monitoring with theoretical simulation provides a new way to evaluate the performance degradation of commercial amplifiers in a radiation environment.

中文翻译：

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用于空间应用的铒-镱共掺杂光纤放大器的辐射效应模拟

摘要。提出了一种考虑辐射效应的铒-镱共掺杂光纤放大器（EYDFA）的改进模型。在该模型中，辐射引起的损耗项被引入功率传播方程，结合简化的速率方程来模拟辐射对与空间任务相关的 EYDFA 性能的影响。说明了一种用于恢复 EYDFA 的背景损失和辐射引起的损失的方法。数值模拟工具基于自制的粒子群优化程序。在实验方面，两个相同类型的放大器分别用 Co60 伽马射线照射，总剂量分别为 10 和 50 krad。与实验数据相比，模型绘制的输出功率曲线与实验测量值吻合较好，验证理论模型的有效性。使用这种将在线监测的实验测试与理论模拟相结合的方法，为评估商用放大器在辐射环境中的性能下降提供了一种新方法。