A novel diode-pumped, efficient, quasi-end-pumping scheme that uses two lens ducts to achieve homogeneous pumping in a gain medium was proposed and evaluated. With this technique, room-temperature laser action at a pulse repetition frequency up to 20 Hz was demonstrated in 5%Tm, 0.5%Ho:LuLiF<sub>4</sub>, which we grew by the Czochralski method. At 10 Hz a long-pulse laser output energy in excess of 24 mJ and a slope efficiency with respect to the incident pump energy of 10.7% were obtained.
© 2001 Optical Society of America
(140.2010) Lasers and laser optics : Diode laser arrays
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3580) Lasers and laser optics : Lasers, solid-state
(140.5560) Lasers and laser optics : Pumping
(160.5690) Materials : Rare-earth-doped materials
Vikas Sudesh, K. Asai, K. Shimamura, and T. Fukuda, "Room-temperature Tm, Ho:LuLiF4 laser with a novel quasi-end-pumping technique," Opt. Lett. 26, 1675-1677 (2001)