摘要
光子暗化是影响光纤激光器及放大器稳定性和寿命的重要因素。通过实验观察了光纤激光器输出功率的时间演化特性，发现暗化的光纤具有自我恢复的现象，其恢复的程度具有时间依赖的特性。通过设计一种可行的光子暗化测试方法，测试了国产光纤的光子暗化特性。利用638nm半导体激光器对已暗化的光纤进行漂白，结果表明638nm激光可以有效漂白光子暗化引起的额外损耗，并对其机理给出了一种合理的解释。
Photodarkening （PD） is recognized as an important factor that affects the reliability and lifetime of many fiber lasers and amplifiers. Temporal characteristics of the fiber laser and a self-recovery phenomenon with time dependence in darkened fibers are observed. A feasible method to measure PD is designed and several domestic fibers are tested. A 638 nm laser diode （LD） is utilized to bleach the darkened fiber. Experimental result indicates that the excess loss caused by PD can be considerably mitigated by 638 nm irradiation and one reasonable explanation is demonstrated.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2013年第B12期33-37,共5页
Chinese Journal of Lasers
基金
国防科技大学科研计划项目（JCl2-07-03）
关键词
光纤激光器
掺镱光纤
光子暗化
光子漂白
fiber lasers
ytterbium doped fibers
photodarkening
photobleaching
