We measured small-signal gain in a cw diode-pumped Cr:LiSAF and showed that upconversion and thermal quenching of fluorescence strongly limit small-signal gain. Then we optimized the gain in a Cr:LiSAF laser pumped by two 400-mW red diodes. In Q-switched operation, this laser produced tunable nanosecond pulses between 800 and 900 nm. At 850 nm, we obtained 230-ns pulses with an energy of 6.5 µJ at a repetition rate of 10 kHz.
© 1996 Optical Society of America
F. Falcoz, F. Kerboull, F. Druon, F. Balembois, P. Georges, and A. Brun, "Small-signal gain investigations for a continuous-wave diode-pumped Q-switched Cr:LiSAF laser," Opt. Lett. 21, 1253-1255 (1996)