以1 560 nm 的掺Er3+石英光纤激光器作为泵浦源, 在Tm3+掺杂的碲酸盐微结构光纤中实现了2 μm的激光输出。采用棒管法拉制出了纤芯由6个空气孔包围的微结构光纤, 选取了2.8 cm 的微结构光纤, 研究了其激光性能, 获得了9 mW 波长为1 872 nm 的激光输出, 激光的斜效率为6.53%, 激光阈值为200 mW。研究结果表明, 所制备的Tm3+掺杂碲酸盐微结构光纤可用于制作紧凑型2 μm光纤激光器。

We investigated the ~2 μm lasing performance of Tm3+ doped tellurite microstructure fiber pumped by an Er3+ doped silica fiber laser operating at 1 560 nm. The microstructure fibers consisting of a solid core surrounded by six air holes were fabricated by using a rod-in-tube method. A maximum unsaturated power of 9 mW laser operating at ~1 872 nm was obtained in a Tm3+ doped 2.8 cm long microstructure fiber with the slope efficiency of ~6.53% and the threshold power of ~200 mW. The results indicate that the Tm3+ doped tellurite microstructure fiber is a promising material for the compact 2 μm fiber laser.