Generation of tunable radiation in a BeAl2O4:Ti3+ laser subjected to pulsed coherent pumping at a high repetition frequency

Coherent pumping of a titanium-activated chrysoberyl laser, by the second harmonic of a continuously pumped YAG:Nd laser operating in the Q-switched regime at a pulse repetition frequency 3–15 kHz, made it possible to achieve a conversion efficiency of ~5% and tuning of the emission wavelength in the range 0.73–0.95 µ. It was found experimentally that the lifetime of an excited state of the Ti³⁺ ions decreased on increase in temperature from 4.9 µsec at 300 K to 0.2 µsec at 500 K.