Jiao Yan, Yang Qiubai, Zhu Yiming, Wang Fan, Zhang Lei, Wang Meng, Wang Shikai, Shao Chongyun, Yu Chunlei, Hu Lili
Opt Express. 2022 Feb 14;30(4):6236-6247. doi: 10.1364/OE.450445.
We report a novel pretreatment method to improve the radiation resistance of Er-doped fiber (EDF). The processing object of this method is EDF preform, and the pretreatment processing involves three steps: deuterium loading, pre-irradiation, and thermal annealing. The effects of pretreatment conditions on the optical loss, gain performance, and radiation resistance of EDF were systematically studied. The relevant mechanisms were revealed using Fourier transform infrared (FTIR), radiation-induced absorption (RIA), and electron paramagnetic resonance (EPR) spectroscopies. The results show that the pretreatment can not only greatly reduce the hydroxyl content of the EDF core, but it can also effectively improve the radiation resistance of EDF. The online test results show that the gain of the commercial, pristine, and pretreated EDFs were reduced by 19.0, 4.2, and 1.3 dB, respectively, corresponding to a decrease of 68.1, 16.2, and 4.7% after 98 krad X-rays irradiation. The high vacuum experiments show that the pretreatment method can maintain long-term stable high radiation resistance. This work provides a reference for the development of high-performance radiation resistant EDFs for use in the lower, middle, and geosynchronous earth orbit.
我们报道了一种提高掺铒光纤（EDF）抗辐射性能的新型预处理方法。该方法的处理对象是EDF预制棒，预处理过程包括三个步骤：充氘、预辐照和热退火。系统研究了预处理条件对EDF的光损耗、增益性能和抗辐射性能的影响。利用傅里叶变换红外光谱（FTIR）、辐射诱导吸收光谱（RIA）和电子顺磁共振光谱（EPR）揭示了相关机制。结果表明，预处理不仅可以大大降低EDF纤芯的羟基含量，还能有效提高EDF的抗辐射性能。在线测试结果表明，商用、原始和预处理的EDF在98 krad X射线辐照后的增益分别降低了19.0、4.2和1.3 dB，相应下降了68.1%、16.2%和4.7%。高真空实验表明，该预处理方法可保持长期稳定的高抗辐射性能。这项工作为开发用于低、中地球轨道和地球同步轨道的高性能抗辐射EDF提供了参考。
