摘要
面向2μm掺铥光纤激光器的空间应用,本文针对典型商用掺铥光纤(TDF)开展了γ射线辐照效应实验研究。利用^(60)Co源放射的γ射线,对由5段同批次Nufern公司SM-TDF-10P/130-HE型TDF样品搭建的2μm光纤激光器进行总剂量为9.0 krad(Si)、剂量率为0.5~3.0 rad/s的辐照效应在线测试。结果表明,TDF的出光性能在辐照过程中出现了显著衰减,衰减幅度随着剂量率的上升而增大。通过对TDF样品在辐照前和辐照后的吸收光谱进行对比测试,观察到在经过总剂量9 krad(Si)的γ射线辐照后,TDF对793 nm泵浦光的吸收峰接近消失。对前述经历γ辐照之后的TDF样品进行2 h的793 nm泵浦光漂白实验测试,未见其出现性能恢复现象。可见,面向空间应用的该典型掺铥光纤需大力提高耐空间辐射性能。
In order to realize the space application of 2 μm thulium-doped fiber laser,the experimental studyof γ-ray irradiation effect is carried out for typical commercial Tm-doped fiber（ TDF）. Using a gamma ray of60Co,the irradiation effect of a total dose of 9. 0 krad（ Si） and a dose rate of 0. 5-3. 0 rad/s is performed on a 2 μm fiber laser constructed from 5 groups of the same TDF samples batch of SM-TDF-10 P/130-HE produced by Nufern. The measurement results show that the light emission performance of TDF greatly attenuated during irradiation,and the attenuation amplitude increases with the increase of the dose rate. By comparing the absorption spectra of the TDF sample before and after irradiation,it is found that the absorption peak of the793 nm pump light disappeared with the irradiation of the total dose of 9 krad（ Si）. The above-mentioned irradiated TDF sample is subjected to a 793 nm pump photobleaching test for 2 hours,and no performance recovery is observed. It can be seen that the space radiation performance of typical Tm-doped fiber has to be improved for space applications.
作者
吴闻迪
余婷
陶蒙蒙
李兴冀
叶锡生
WU Wen-di;YU Ting;TAO Meng-meng;LI Xing-ji;YE Xi-sheng(Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;State Key Laboratory of Laser Interaction with Matter,Northwest Institute of Nuclear Technology,Xi＇ an 710024,China;National Key Laboratory of Materials Behavior and Evaluation Technology in Space Environment,Harbin Institute of Technology,Harbin 150001,China)
出处
《中国光学》
EI
CAS
CSCD
北大核心
2018年第4期610-614,共5页
Chinese Optics
基金
中国科学院"百人计划"项目(No.1505521XR0)
空间环境材料行为及评价技术国家级重点实验室基金项目(No.6142910030613)~~
关键词
掺铥光纤
空间辐照
γ射线辐照效应
Tm-doped fiber
spatial radiation
gamma-ray irradiation effect
