2020, Zhao, Yongguang, Wang, Li, Chen, Weidong, Wang, Jianlei, Song, Qingsong, Xu, Xiaodong, Liu, Ying, Shen, Deyuan, Xu, Jun, Mateos, Xavier, Loiko, Pavel, Wang, Zhengping, Xu, Xinguang, Griebner, Uwe, Petrov, Valentin

We report on a high-power Ho:YAG single-crystal fiber (SCF) laser inband pumped by a high-brightness Tm-fiber laser at 1908 nm. The Ho:YAG SCF grown by the micro-pulling-down technique exhibits a propagation loss of at. A continuous-wave output power of 35.2 W is achieved with a slope efficiency of 42.7%, which is to the best of our knowledge the highest power ever reported from an SCF-based laser in the 2 spectral range. © 2020 The Author(s). Published by Cambridge University Press in association with Chinese Laser Press.