为了推进掺铒光纤抗辐射性能的研究, 全面掌握掺铒光纤性能在辐照条件下的变化规律。 基于色心模型对掺铒光纤的辐照作用机理进行了分析, 并据此对掺铒光纤在辐照中的性能变化趋势进行了预测推断。 然后根据掺铒光纤的工作原理和应用特性, 在伽马辐照条件下对两种不同型号(EDF-L-980和MP980)掺铒光纤的980 nm波段损耗谱、 1 530 nm波段损耗谱以及发射光谱的特性进行了在线实时监测, 并在辐照停止后进行了恢复测量。 研究表明, 在辐照中两种掺铒光纤的性能变化趋势一致。 在损耗谱方面, 980 nm波段和1 530 nm波段的损耗随辐照单调增加, 980 nm吸收峰与1 530 nm吸收峰处的损耗与辐照剂量呈近似线性关系; 在发射光谱方面, 发射光谱强度随辐照单调降低, 光谱能量向长波方向转移, 平均波长和光谱带宽大幅增加, 1 530 nm发射峰处的发光强度与辐照剂量也呈近似线性关系。 辐照停止后, 掺铒光纤体现出了一定的恢复能力, 但是各项参数的恢复均不到40%。 各项实验结果与理论模型和分析预测匹配良好, 证明了辐照对掺铒光纤性能影响理论解释的合理性。

In order to promote the research on erbium-doped fiber’s anti-radiation properties and fully grasp variation laws of erbium-doped fiber’s properties under radiation, theoretical analysis on how irradiation effect erbium-doped Fiber based on model of color centers was conducted. The performance changes of erbium-doped fiber that may occur during irradiation were predicted. According to working principle and application characteristics, online real-time monitoring of 980 nm wave band loss spectra, 1 550 nm wave band loss spectra, luminescence spectra of two different types(EDF-L-980 and MP980) of erbium-doped fiber as well as recovery measuring after radiation were carried out,. Studies showed that spectral characteristics of both types have similar variation trends during radiation. Losses at 980 and 1 530 nm wave band increase monotonically with dose, and the relationship is approximately linear at absorption peak of 980 and 1 530 nm; luminescence spectra intensity decreases monotonically with dose, and energy of luminescence spectra is shifting to long wavelengths, while its mean wavelength and bandwidth increasing substantially. The relationship between luminescence intensity and dose is also approximately linear at luminescence peak of 1 530 nm. Erbium-doped fiber’s spectral characteristics recovered modestly after radiation, but to a limited extent of less than 40% for all parameters. The experiment result is in good agreement with theoretical analysis and prediction, so rationality of theoretical explanation of erbium-doped fiber’s performance changes during radiation has been proven.