We used a cw-pumped, <b>Q</b>-switched, and mode-locked Nd:YAG oscillator and a cw-pumped, multipass traveling-wave amplifier with a face-pumped total-internal-reflection Nd:YAG slab as the gain element to produce an 80-W, TEM00 diffraction-limited beam at a <b>Q</b>-switching rate of 10 kHz (50 W at 3 kHz). The output of this device was used to synchronously pump a degenerate optical parametric oscillator that utilized six KTiOPO<sub>4</sub> crystals as nonlinear converters. A maximum average power of 14 W at 2.128 µm was generated with a conversion efficiency of 25% at 4.25 kHz.
© 1993 Optical Society of America
W. T. Lotshaw, J. R. Unternahrer, M. J. Kukla, C. I. Miyake, and F. D. Braun, "Performance of a degenerate KT1OPO4 optical parametric oscillator, synchronously pumped by a mode-locked and Q-switched Nd:YAG continuous-wave oscillator—slab amplifier combination," J. Opt. Soc. Am. B 10, 2191-2194 (1993)