Abstract

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

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