Abstract
The bottleneck in laser emission, where the upper-level lifetime () is significantly shorter than that of the lower-level () lifetime, is overcome by co-doping and ions. A novel kind of (Ho,Pr:YLF) crystal is fabricated by optimizing the doping concentration ratios. By using as-grown Ho,Pr: YLF crystals with doping concentrations of 0.498 at. % , 0.115 at. % and 0.489 at. % , 0.097 at. % as gain media, both high-efficiency and continuous-wave 2.9 μm laser operations are realized under 1150 nm fiber laser pumping, respectively. With the 0.498 at. % , 0.115 at. % : YLF crystal, a maximum output power of 1.27 W with a corresponding slope efficiency of 28.3% is yielded under a 4.48 W absorbed pump power, which is the highest output power among the -doped 2.9 μm lasers ever reported, to the best of our knowledge. The results well reveal the great potential of Ho,Pr:YLF crystals in developing high-power, high-efficiency 2.9 μm mid-infrared lasers.
© 2018 Optical Society of America
Full Article | PDF ArticleMore Like This
Shuai Ye, Xue Zhou, Shengjun Huang, Hongkun Nie, Jintian Bian, Tao Li, Kejian Yang, Jingliang He, and Baitao Zhang
Opt. Lett. 47(21) 5642-5645 (2022)
Peixiong Zhang, Yin Hang, and LianHan Zhang
Opt. Lett. 37(24) 5241-5243 (2012)
Shunbin Wang, Jiquan Zhang, Niannian Xu, Shijie Jia, Gilberto Brambilla, and Pengfei Wang
Opt. Lett. 45(5) 1216-1219 (2020)