Continuous-wave laser oscillation of Cr<sup>3+</sup>:MgO at room temperature was realized under argon-ion laser pumping at 476 and 514 nm. The free-running laser wavelength was 840 nm, and with different mirror sets laser oscillation at 824, 830, 870, and 878 nm was also realized. With different crystals a maximum output power of 48 mW and a lowest threshold with respect to the absorbed pump power of 80 mW were realized. The slope efficiencies with respect to the absorbed pump power were as high as 2.3%. No thermal effects were observed for absorbed pump powers as great as 2.7 W.
© 1999 Optical Society of America
(140.3380) Lasers and laser optics : Laser materials
(140.3580) Lasers and laser optics : Lasers, solid-state
(140.5680) Lasers and laser optics : Rare earth and transition metal solid-state lasers
(160.3380) Materials : Laser materials
(160.6990) Materials : Transition-metal-doped materials
S. Kück, E. Heumann, T. Kärner, and A. Maaroos, "Continuous-wave room-temperature laser oscillation of Cr3+:MgO," Opt. Lett. 24, 966-968 (1999)