高功率掺镱光纤激光器的辐照影响分析及研究进展

高功率掺镱光纤激光器在空间环境中的应用日益增多，但掺镱光纤材料在空间辐照条件下会产生色心效应，导致损耗增加，影响光纤器件以及激光器整机的性能，从而给高功率光纤激光器在空间环境的长期稳定工作带来隐患。从空间辐照对高功率光纤激光器性能的影响机理、抑制方法和研究进展等3个方面进行介绍。首先介绍了空间辐照对高功率掺镱光纤激光器中关键光学器件、放大级热负载、非线性效应等方面的影响分析，其次介绍了抑制辐照效应的典型方法及其在高功率掺镱光纤激光器中的可行性分析，最后介绍了国内外典型的高功率掺镱光纤激光器的辐照影响及抑制的研究成果，并展望了未来发展趋势。

Influence of space radiation on properties of high power Yb-doped fiber lasers and their recent progress

High power Yb-doped fiber lasers have gained increasing application in space environment. However, the space radiation will bring color centers in Yb-doped fiber materials, thus increasing the inherent loss of the fiber. As a result, the optical properties of typical fiber-based components and the fiber lasers will be deteriorated, which makes it difficult for high power fiber lasers to achieve long-term stable operation in space environment. In this paper, a detailed introduction from three main aspects is given. Firstly, the influence of space radiation on typical optical components, thermal loading and nonlinear effects in high power fiber laser are introduced. Next, the typical suppressing methods of space radiation and their feasibility in high power fiber laser system are discussed. In the end, the representative research progress on the influence of space radiation on high power Yb-doped fiber lasers and effective suppressing methods at home and abroad are introduced.