We report the first diode-pumped solid-state laser operating in cw-mode-loc
ked regime and simultaneously achieving intracavity frequency-tripling. Thi
s laser provide UV picosecond pulses (lambda = 355 nm) of 10 ps duration wi
th 0.5 mW average power at 150 MHz repetition rate. A different set of adju
stments gave rise to a Q-switched mode-locked regime. Trains of hundred UV
pulses of 60 ps duration and 4 W peak power were produced in this latter ca
se at 50 kHz repetition rate.