Room-temperature cw operation of a Ti:Al2O3 laser has been demonstrated for the first reported time. Laser emission at 770 nm was excited with an all-line Ar-ion laser pump. The maximum output power was 1.6 W. Values of (64 ± 10)% for the internal quantum efficiency and (2.4 ± 0.5)% for the round-trip cavity loss are obtained from the thresholds and slope efficiencies measured with 0.7 and 4.9% output couplers. The cavity-loss value places an upper bound of 0.007 cm-1 on the absorption coefficient of the laser rod for the π polarization (E‖ĉ)‖ at 770 nm, compared with 0.73 cm-1 measured at 490 nm, the peak of the Ti3+ pump band.
© 1986 Optical Society of America
A. Sanchez, R. E. Fahey, A. J. Strauss, and R. L. Aggarwal, "Room-temperature continuous-wave operation of a Ti:Al2O3 laser," Opt. Lett. 11, 363-364 (1986)