Abstract

Efficient frequency conversion of cw mode-locked Ti:Al₂O₃ laser radiation using lithium triborate, β-barium borate, and lithium iodate crystals as the nonlinear material is demonstrated. Second-, third-, and fourth-harmonic generation results in tunable blue and ultraviolet radiation down to 205 nm with transform-limited pulses and pulse lengths below 1 ps. Maximum average powers (repetition rate 82 MHz) of 700 mW at 400 nm, 120 mW at 272 nm, and 10 mW at 210 nm were obtained. The effects of group-velocity dispersion have to be taken into account to optimize the different frequency-conversion processes.

© 1991 Optical Society of America

Resonant frequency doubling of a self-starting, coupled-cavity, mode-locked Ti:Al₂O₃ laser

P. F. Curley and A. I. Ferguson
Opt. Lett. 16(5) 321-323 (1991)

Femtosecond passively mode-locked Ti:Al₂O₃ laser with a nonlinear external cavity

J. Goodberlet, J. Wang, J. G. Fujimoto, and P. A. Schulz
Opt. Lett. 14(20) 1125-1127 (1989)

Low-threshold, cw, all-solid-state Ti:Al₂O₃ laser

James Harrison, Andrew Finch, David M. Rines, Glen A. Rines, and Peter F. Moulton
Opt. Lett. 16(8) 581-583 (1991)

Mode locking of Ti:Al₂O₃ lasers and self-focusing: a Gaussian approximation

François Salin, Jeff Squier, and Michel Piché
Opt. Lett. 16(21) 1674-1676 (1991)

Resonant frequency quadrupling of a mode-locked diode-pumped Nd:YLF laser

G. P. A. Malcolm, M. A. Persaud, and A. I. Ferguson
Opt. Lett. 16(13) 983-985 (1991)