面向太空环境应用的抗辐照有源光纤特性研究

针对太空恶劣辐射环境会造成光器件的光学性能降低或失效的问题。本文利用改良化学气相沉积法（MCVD）结合原子层沉积（ALD）掺杂技术制备铋铒共掺光纤（BEDF），经不同辐照剂量的伽马射线处理，与掺铒光纤（EDF）的光谱特性进行对比研究。光纤样品分别经0.3 kGy、0.5 kGy、0.8 kGy 和 1.5 kGy辐照处理，对比光谱发现 BEDF的辐照诱导损耗（RIA）的增加明显低于EDF, 特别是经1.5 kGy 的辐照处理，EDF的RIA比BEDF增加1.93 dB/m。EDF的荧光强度随辐照剂量的增加而降低，并低于未辐照前的荧光强度，而对于BEDF而言，其荧光强度随辐照剂量增加先增加后减弱，且均高于未辐照的荧光强度。实验结果表明，BEDF光纤具有一定抗辐照特性，对应用于太空环境具有重要研究意义。

Study on Characteristics of Irradiation-Resistant Active Optical Fiber for Space Applications

Aiming at the problem that the bad radiation environment in space will cause the optical performance of optical devices to decrease or fail. Bismuth erbium-doped co-doped fiber (BEDF) was fabricated by modified chemical vapor deposition (MCVD) and atomic layer deposition (ALD) doping technique. The spectral characteristics of BEDF and EDF were compared by gamma ray treatment with different irradiation doses. The optical fiber samples were irradiated by 0.3 kGy, 0.5 kGy, 0.8 kGy and 1.5 kGy respectively, and the comparison spectra showed that the increase of irradiation induced loss (RIA) of BEDF was significantly lower than that of EDF, especially after 1.5 kGy irradiation, the RIA of EDF is 1.93 (dB/m) higher than that of BEDF. The fluorescence intensity of EDF decreases with the increase of the irradiation dose and is lower than that before the irradiation, while for BEDF, the fluorescence intensity increases first and then decreases with the increase of the irradiation dose, and is higher than that of the non-irradiation. The experimental results show that BEDF optical fiber has certain anti-irradiation characteristics, which has important research significance in space environment.