We investigated the coupled radiation and temperature effect on the gain degradation of erbium-doped fiber amplifier (EDFA) and erbium–ytterbium-doped fiber amplifier (EYDFA). The irradiation temperatures range from −40 °C to 120 °C. Steady-state $X$ -ray (40 keV, 300 krad (SiO ₂ ), ~27 rad/s) experiments provide evidence for a minor coupled radiation and temperature effect on the gains of both reference and radiation-tolerant EDFA and EYDFA. This is an important result as it validates the reliance on room-temperature testing in establishing the suitability of fiber amplifiers for space applications. Furthermore, we also investigated the radiation-induced attenuation (RIA) kinetics during and after the various rare-earth-doped fiber irradiations to improve our knowledge of the basic radiation-effects mechanisms and their dependence on the temperature during irradiation. It appears that these effects also depend on the presence of cerium, a codopant that is incorporated to passivate the Al- or P-related defects and then to enhance the amplifier radiation tolerance.

中文翻译：

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温度和辐射的联合作用对掺Er和Er-Yb的光纤放大器增益的影响

我们研究了辐射和温度耦合对掺光纤放大器（EDFA）和掺-光纤放大器（EYDFA）增益衰减的影响。照射温度为−40°C至120°C。稳定状态 $ X $ 射线（40 keV，300 krad（SiO ₂ ），〜27 rad / s）实验提供了证据，证明辐射和温度对参考和耐辐射的EDFA和EYDFA的增益都有较小的耦合作用。这是一个重要的结果，因为它证明了在确定光纤放大器在太空应用中的适用性时对室温测试的依赖。此外，我们还研究了各种稀土掺杂纤维辐照过程中和辐照后的辐射诱导衰减（RIA）动力学，以提高我们对基本辐射效应机理及其对辐照过程中温度的依赖性的了解。看来，这些效应还取决于铈的存在，铈是一种掺入以钝化与Al或P有关的缺陷，然后增强放大器的辐射耐受性的共掺杂物。