diode-pumped room-temperature Ho:Tm:LuLiF4 laser achieved an optical e
fficiency of 9.4% under normal mode operation, Under similar experimen
tal conditions, Ho:Tm:LuLiF4 yielded 1.5 times greater optical efficie
ncy than Ho:Tm:YLiF4. Absorption spectra and lifetimes as a function o
f pump energy were measured for evaluation of this laser material.