[摘要]：A high energy and high efficiency extracavity KTiOAsO4 (KTA) optical parametric oscillator (OPO) with excellent stability and beam quality, which is pumped by a Q-switched single-longitudinal-mode Nd:YAG laser, has been demonstrated based on a type II non-critical phase matching (NCPM) KTA crystal. The maximum pulse energy of 10 mJ at 3.467 mu m is obtained with the repetition rate of 10 Hz and pulse width of 2 ns, corresponding to an optical-optical conversion efficiency of 14% from 1.064 mu m to 3.467 mu m. After one hour of investigation, the OPO output stability better than 4.5% rms has been obtained. [GRAPHICS] The output stability of 3.467 mu m (C) 2011 by Astro Ltd. Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA
