A compact diode-end-pumped Nd:YAG laser was frequency-doubled to 0.532 μm with an intracavity KTP or LBO crystal using a “V” cavity configuration. Two acousto-optic Q-switches were employed at repetition rates of 10–30 kHz. Dichroic fold and end mirrors were used to output two beams with up to 140 W of 0.532 μm power using KTP and 116 W using LBO as the frequency doubling crystal. The maximum output power at 0.532 μm corresponds to 66% of the 1.064 μm power obtained with an optimized output coupler reflectivity. The minimum output pulse duration varied with repetition rate from 90 to 130 ns. The multimode output beam had a smooth profile and a beam quality of M2 = 51.

© 1998 Optical Society of America

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