Abstract

A diode-pumped Nd:YAG laser was frequency doubled to 0.532μm with an intracavity KTiOPO><sub>4</sub> crystal in a V-cavity arrangement, achieving an output power of 140 W. Acousto-optic <i>Q</i> switching was employed at repetition rates of 10–30 kHz, and the beam quality was assessed at M<sup>2</sup>≈50 . It was deduced on the basis of our model that the strength of the nonlinear frequency conversion is the main parameter determining the pulse width.

© 1998 Optical Society of America

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