We report on the room-temperature continuous-wave (CW) operation of a Ho:YAlO
3 laser that is resonantly end pumped at 1.94 μm by a diode-pumped thulium-doped laser in the same host. Through the use of
a 1 at % Ho
3+-doped 20-mm-long YAlO
3 crystal (
b cut), the Ho:YAlO
3 laser generated 1 W of linearly polarized (
E//c) output at 2118 nm and 0.55 W of
E//a output at 2128.5 nm for an incident pump power of 5 W, with an output coupler transmission of 14 and 3%, respectively.
An optical-to-optical conversion efficiency of 20% and a slope efficiency of 33% were achieved at 2118 nm corresponding to
an incident pump power.
PACS numbers 42.55.Xi - 42.60.Pk
Original Text © Astro, Ltd., 2008.