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
$0.05\pm 0.005~\text{cm}^{-1}$
at
$2.09~\unicode[STIX]{x03BC}\text{m}$
. 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
$\unicode[STIX]{x03BC}\text{m}$
spectral range.
35 W continuous-wave Ho:YAG single-crystal fiber laser
