We report on an 888 nm pumped passively mode-locked TEM00 Nd:YVO4 oscillator providing 56 W of average power at a repetition rate of 110 MHz with 33 ps pulse duration, further amplified to 111 W in a 52% optical efficiency single-pass amplifier stage, maintaining beam quality at M-2 = 1.05. Frequency doubling in a LiB3O5 crystal generated up to 87 W at 532 nm, while a third harmonic power of 35 W was achieved in a nonoptimized tripling configuration, corresponding to 80% and 33% conversion efficiency. (c) 2007 Optical Society of America.
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