[1] R X Xing, Y B Sheng, Z J Liu, et al. Investigation on radiation resistance of Er/Ce co-doped silicate glasses under 5 kGy gamma-ray irradiation. Optical Materials Express, 2, 1329(2012).

[2] Hongbo Wang, Qin Li. Radiation effects and protection techonolgy for optical components of fiber optic gyroscope. Infraed and Laser Engineering, 44, 682-687(2015).

[3] Fuhua Liu, Ping Wang, Gang Feng, et al. Influence of Gamma-ray radiation on optical fiber disperion. Infraed and Laser Engineering, 45, 0118001(2016).

[4] Chongyun Shao, Chunlei Yu, Lili Hu. Radiation-resistant active fibers for space pplications. Chinese Journal of Lasers, 47, 0500014(2020).

[5] R Dardaillon, M Lancry, M Myara, et al. Radiation-induced absorption and photobleaching in erbium Al-Ge-codoped optical fiber. Journal of Materials Science, 55, 14326-14335(2020).

[6] S Girard, A Morana, A Ladaci, et al. Recent advances in radiation-hardened fiber-based technologies for space applications. Journal of Optics, 20, 093001(2018).

[7] M León, M Lancry, N Ollier, et al. Ge- and Al-related point defects generated by Gamma irradiation in nanostructured erbium-doped optical fiber preforms. Journal of Materials Science, 51, 10245-10261(2016).

[8] C Cao, Z Gu, Q Qiu, et al. Radiation-resistant Er-doped fiber based on Ge-Ce Co-doping. IEEE Photonics Journal, 14, 1-5(2022).

[9] Chi Cao, Bo Wang, Yingbo Zhu, et al. Domestic high quality radiation-resistant erbium-doped fiber. Chinese Journal of Lasers, 48, 2015001(2021).

[10] J C Lagomacini, D Bravo, A Martín, et al. Growth kinetics of AlOHC defects in γ-irradiated silica glasses. Journal of Non-Crystalline Solids, 403, 5-8(2014).

[11] M Essid, J Albert, J L Brebner, et al. Correlation between oxygen-deficient center concentration and KrF excimer laser induced defects in thermally annealed Ge-doped optical fiber preforms. Journal of Non-Crystalline Solids, 246, 39-45(1999).

[12] G P Singh, P Kaur, S Kaur, et al. Conversion of Ce³⁺ to Ce⁴⁺ ions after Gamma ray irradiation on CeO₂-PbO-B₂O₃ glasses. Physica B Condensed Matter, 408, 115-118(2013).

[13] Shanqiang Chen, Siqing Liu, Liqin Shi, et al. A software for space radiation effects assessment. Journal of Astronautics, 38, 317-322(2017).

[14] Jingming Song, Jianhua Guo, Xueqin Wang. Radiation induced attenuation effect for optical fiber. Laser & Optoelectronics Progress, 49, 080008(2012).

[15] [15] Feng Wei. Study on irradiation damage mechanism of Yb doped quartz glass [D]. Xi’an: Xi’an Institute of Optical & Precision Mechanics, Chinese Academy of Sciences (University of Chinese Academy of Sciences), 2020. (in Chinese)

[16] Chongyun Shao, Wenbin Xu, N Ollier, et al. Suppression mechanism of radiation-induced darkening by Ce doping in Al/Yb/Ce-doped silica glasses: Evidence from optical spectroscopy, EPR and XPS analyses. Journal of Applied Physics, 120, 153101(2016).