基于Sagnac环形镜的高功率多波长线偏振掺镱光纤激光器

摘要

A dumbbell-shaped ytterbium-doped all-fiber laser based on Sagnac fiber loop mirror was demonstrated in this paper.Stable multiwavelength laser output was obtained through finely tuning the polarization controller under the pump of 976 nm laser diode.The largest output power was 5.13 W with the degree of polarization being 14.19 dB while the power fluctuation was no bigger than 0.02 W under the pump power of 20.4 W.The corresponding power difference was less than 3 dB among all channels in long-term observations.%设计了基于Sagnac环形镜的哑铃型结构全光纤掺镱激光器,使用976 nm多模激光二极管泵浦,通过调节偏振控制器获得了稳定的多波长线偏振激光输出.泵浦功率为20.4W时,最高输出功率达到5.13W,功率波动不大于0.02 W,激光器输出多波长激光线偏振度约为14.19 dB,多波长输出功率平坦度优于3 dB.