面向空间环境中有源光纤器件的复合多层抗辐射薄膜研究  

Multilayer Radiation-Resistant Composite Films for Active Optical Fiber Devices in Space Environments

作　　者：洪沈展 黄璐[1] 王宁[1] 王航[1] 钟池 卜轶坤 罗正钱[1,2] Hong Shenzhan;Huang Lu;Wang Ning;Wang Hang;Zhong Chi;Bu Yikun;Luo Zhengqian(Fujian Key Laboratory of Ultrafast Laser Technology and Applications,Xiamen University,Xiamen 361005,Fujian,China;School of Electronic Science and Engineering,Xiamen University,Xiamen 361005,Fujian,China)

机构地区：[1]厦门大学福建省超快激光技术与应用重点实验室,福建厦门361005 [2]厦门大学电子科学与技术学院,福建厦门361005

出　　处：《中国激光》2025年第2期81-89,共9页Chinese Journal of Lasers

基　　金：国家重点研发计划(2020YFC2200400);福建省科技规划项目(2022H6015)。

摘　　要：光纤系统在宇宙环境中可能会遭受高能粒子和能量束的辐射,致使有源光纤发生色心效应和辐致暗化效应,从而导致有源光纤损耗增大及光增益急剧下降。对此,本课题组研制了一种基于镀膜技术的柔性复合多层抗辐射薄膜,该薄膜可以缠绕在有源光纤表面,达到抗辐射的效果。在实验中,对缠绕复合薄膜的掺Yb^(3+)保偏光纤进行总剂量约为85 kGy的辐照,然后测量其发射谱、吸收谱、辐射诱导损耗、激光性能等。测试结果表明,采用复合多层抗辐射薄膜进行防护的光纤明显优于未采取任何防护措施的光纤。该复合多层抗辐射薄膜在辐照环境下能有效降低有源光纤受到的辐照,为光纤防辐射提供了一种新途径。Objective In space environments,the performance and lifespan of active optical fibers are significantly compromised by highenergy particles and radiation rays primarily due to radiation-induced darkening(RD).Consequently,the capabilities of fiber lasers and amplifiers in space environments are undermined.This issue is generally attributed to radiation-induced impacts on the color centers within the active fibers.Numerous types of active irradiation suppression technologies are currently available for enhancing the performance of active optical fibers,and their radiation-resistant effects have been validated.The most commonly used passive irradiation suppression technique is shielding with metallic materials.Although effective,this approach is neither lightweight nor flexible,typically requiring significant mass and space,and cannot conform to the circumference of the fiber.Consequently,this study aimed to explore a lightweight,flexible,and directly wearable passive radiation-resistant film that can be applied to the circumference of optical fibers.Methods This study proposes a multilayer radiation-resistant composite film fabricated using advanced optical precision deposition techniques,boasting the advantages of being lightweight,flexible for wearable applications,and cost-effective.It can be directly applied to the circumference of optical fibers and employed in conjunction with other radiation protection methods for fibers,such as metal shielding and fiber doping,to provide point-to-point protection for fiber components that are more susceptible to radiation,thereby enhancing the overall radiation resistance of the optical fibers.This study employed electron beam evaporation combined with ion-assisted deposition technology to fabricate an Al+ITO+Kapton composite multilayer radiation-resistant film,the specific structure of which is shown in Fig.1.After exposure to approximately 85 kGy of radiation in a laboratory setting,the Yb^(3+)doped optical fiber without radiation-resistant film(fiber A),along with three

关 键 词：抗辐射薄膜 掺Yb3+光纤 光纤激光器 辐射诱导损耗 发射谱 

分 类 号：TN253[电子电信—物理电子学]