Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China.
Opt Lett. 2011 May 1;36(9):1575-7. doi: 10.1364/OL.36.001575.
We report on the high-power and high-efficiency operation of a polycrystalline Ho:YAG ceramic laser in-band pumped by a Tm fiber laser at ~1907 nm. Lasing characteristics of a 1.5 at.% and a 2.0 at.% Ho³⁺-doped YAG ceramic were investigated and compared. Using an output coupler of 6% transmission, over 21.4 W of cw output power at 2097 nm has been generated with the 1.5 at.% doped Ho:YAG ceramic under 35 W of incident pump power, corresponding to an average slope efficiency with respect to the incident pump power of 63.6% and an optical-to-optical conversion efficiency of 61.1%.
我们报告了一种多晶 Ho:YAG 陶瓷激光器在 ~1907nm 的 Tm 光纤激光器带内泵浦下的高功率、高效率运行。研究并比较了 1.5at.%和 2.0at.% Ho³⁺掺杂 YAG 陶瓷的激光特性。使用 6%透过率的输出耦合器，在 35W 的入射泵浦功率下，1.5at.%掺杂 Ho:YAG 陶瓷产生了超过 21.4W 的 2097nm 连续波输出功率，对应于入射泵浦功率的平均斜率效率为 63.6%，光光转换效率为 61.1%。
