Tm-doped LiLuF4 crystal for efficient laser action in the wavelength range from 1.82 to 2.06 mu m

Room-temperature continuous-wave laser action in a novel Tm-doped LiLuF4 crystal emitting at around 1.9 mu m is demonstrated. The crystal growth process, spectroscopic measurements, and laser performance are presented for different Tin concentrations. An overall tunability extending from 1817 to 2056 nm, a slope efficiency of 46%, and a maximum output power in excess of 1.1 W are reported. (C) 2007 Optical Society of America.