Abstract. High powered optical amplifiers (HPOAs) are a key subassembly in free-space optical communication systems. As these free-space optical communications systems are being introduced into space applications, it is critical to assess the impact of the radiation environment present in space on the reliability of these systems. One key component in HPOAs is multimode laser diodes, which are used to pump gain fibers in the HPOA. The reliability of these laser diodes is very dependent on optical output power, with increases in optical power causing dramatic reductions in lifetime. At the same time, radiation darkening is a well-known problem that reduces the efficiency in HPOAs operating in environments with high radiation levels. We use Monte Carlo simulation to evaluate the impact of radiation darkening on the reliability of multimode pump ensembles over time. At radiation fields related to geostationary earth orbits (2 to 5 krad / year) radiation effects reduce multimode pump lifetime by a factor of 7-220 under typical use conditions. Use of redundant pumps operating under derated conditions can mitigate the impact of radiation.

中文翻译：

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使用蒙特卡罗模拟估算辐射环境中多模泵的可靠性

摘要。高功率光放大器 (HPOA) 是自由空间光通信系统中的关键组件。随着这些自由空间光通信系统被引入空间应用，评估空间中存在的辐射环境对这些系统可靠性的影响至关重要。HPOA 中的一个关键组件是多模激光二极管，用于泵浦 HPOA 中的增益光纤。这些激光二极管的可靠性非常依赖于光输出功率，光功率的增加会导致寿命的显着缩短。同时，辐射变暗是一个众所周知的问题，它降低了在高辐射水平环境中运行的 HPOA 的效率。我们使用蒙特卡罗模拟来评估辐射变暗对多模泵浦集合可靠性的影响。在与地球静止轨道相关的辐射场（2 至 5 krad / 年），在典型使用条件下，辐射效应将多模泵的寿命减少 7-220 倍。使用在降额条件下运行的冗余泵可以减轻辐射的影响。