环形腔掺铒光纤激光器输出特性理论与实验研究

Theoretical and Experimentical Research on Output Characteristic of Erbium-doped Fiber Ring Laser

对由不同长度的掺铒光纤和不同分光比的耦合器构成的光纤环形腔激光器的输出特性进行了理论和实验研究。理论分析表明,激光器的输出功率、斜率效率与掺铒光纤的长度、耦合器的分光比有关,且存在最佳值。最后通过实验得到,在泵浦功率为120 mW,掺铒光纤的掺杂浓度为4 000 ppm下,最佳的掺铒光纤长度为3 m左右,最佳输出耦合比在80%附近,与理论分析基本一致。

The output characteristics of fiber ring lasers composed of different length Er- doped Fibers（EDF） and different split ratio output couplers are studied experimentally, Theoretical analysis indicates the threshold and slope efficiency of the laser are related to the length of EDF and the split ratio of the output coupler,and one optimum value exists,these are according with the experimental result.