掺镱光纤光致暗化性能的物理诊断方法

Physical Methods for Diagnosing Photodarkening Performance of Yb-Doped Fibers

光致暗化效应是高功率掺镱光纤激光器稳定性、可靠性及寿命的重要影响因素。对掺镱光纤光致暗化性能进行精确表征和物理诊断是理解光致暗化产生机理及建立光致暗化消除技术的前提和基础。介绍了表征掺镱光纤光致暗化性能的主要物理参量,综述了掺镱光纤光致暗化性能的物理诊断方法,分析了不同方法的优缺点及适用范围,阐述了影响光致暗化性能的关键因素,并对未来掺镱光纤光致暗化性能物理诊断研究方向进行了展望。

The photodarkening effect is a crucial factor that influences the stability, reliability, and lifetime of the high-power Yb-doped fiber lasers. The accurate physical characterization and diagnosis of the photodarkening performance of the Yb-doped fibers are the premise and basis for understanding the photodarkening mechanisms and for establishing the photodarkening elimination technologies. This study introduces the main physical parameters of the photodarkening performance. Further, the physical diagnosis methods used to assess the photodarkening performance are also reviewed. Additionally, the advantages, disadvantages, and application scopes of these methods are analyzed. The major factors influencing the photodarkening performance are subsequently discussed. Finally, the research development trend of the physical diagnosis methods is briefly discussed with respect to the photodarkening performance of the Yb-doped fibers.