面向空间激光通信应用的抗辐照掺铒光纤性能研究  

Radiation Resistance of Erbium-Doped Fibers for Space Laser Communication Applications

作　　者：王博 文建湘[1] 陈子睿 罗艳华 庞拂飞[1] 王廷云[1] Wang Bo;Wen Jianxiang;Chen Zirui;Luo Yanhua;Pang Fufei;Wang Tingyun(Key Laboratory of Specialty Fiber Optics and Optical Access Networks,Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学特种光纤与光接入网省部共建国家重点实验室培育基地,特种光纤与先进通信国际合作联合实验室,上海200444

出　　处：《中国激光》2025年第1期159-168,共10页Chinese Journal of Lasers

基　　金：国家自然科学基金重点项目(61935002)。

摘　　要：随着太空探索与星链激光通信等技术的飞速发展,有源光纤及其相关器件得到了广泛应用。由于太空环境的特殊性,相关应用必须要考虑辐照环境的影响。本团队研制了两种有源光纤EDF1与EDF2,从吸收特性光谱、发光特性光谱与激光输出特性等方面研究了有源光纤的抗辐照性能。实验结果表明:包层掺杂铋元素的抗辐照掺铒光纤EDF2经过1500 Gy剂量的辐照处理之后,在1300 nm处的辐致损耗为5.03 dB/m,相较于未掺铋的掺铒光纤下降了约37.5%;在1550 nm波段处归一化的辐照诱导增益变化(RIGV)为1.89 dB/kGy,相较于EDF1降低了31.9%;利用EDF2搭建的激光器的阈值功率相较于原始光纤搭建的激光器上升了49 mW,相较于利用EDF1搭建的激光器降低了26.9%。同时,使用GEANT4软件进行仿真建模分析,验证了EDF2光纤在铋离子掺杂浓度(质量分数)为1.0%时纤芯沉积能量相对最少。研制的抗辐照掺铒光纤在辐照恶劣环境中具有重要的应用价值。Objective With the rapid development of technologies such as space exploration and Starlink laser communications,active optical fibers and related devices have become widely used.Due to the unique nature of the space environment,these applications must account for the effects of radiation exposure.As a result,extensive research has been conducted to improve the radiation resistance of optical fibers.The primary focus in this field is to reduce the color center defects that arise in optical fibers after irradiation.Bismuth(Bi)is a heavy metal element with a wide range of valence states,making it particularly promising for enhancing radiation resistance in optical fibers.In this paper,we propose a cladding-doped Bi-ion erbium-doped fiber(EDF),which offers a promising solution to prevent performance degradation or failure of optical fiber devices such as optical fiber amplifiers and optical fiber lasers in irradiated environments.It has significant potential for application in radiation-affected environments.Methods Using GEANT4 software,the influence of varying doping concentrations of Bi ions doped in the cladding on the radiation resistance of EDFs is theoretically studied.Based on this,two types of erbium-doped fibers(EDF1 and EDF2)are fabricated using modified chemical vapor deposition(MCVD)combined with atomic layer deposition(ALD).EDF1 contains no Bi ions in its cladding,while EDF2 has Bi ions doped in the cladding.An experimental setup is used to investigate the changes in the optical fiber's spectral characteristics before and after irradiation,including radiation-induced absorption(RIA)spectra,fluorescence spectra,fluorescence lifetime spectra,gain characteristics,and laser performance.Results and Discussions The simulation results indicate that doping Bi ions into the cladding of the fiber decreases energy deposition in the core,initially lowering and then increasing as the doping concentration rises,with the optimal result achieved at a doping concentration of 1.0%(Figs.3 and 4).After irradiation with 15

关 键 词：抗辐照性能 掺铒光纤 光通信 辐照诱导增益变化 

分 类 号：O436[机械工程—光学工程]