Electric field poling has been employed to fabricate 3-mm-thick periodically poled KTiOPO><sub>4</sub> crystal for a high-power optical parametric oscillator. The maximum output power of the singly resonant optical parametric oscillator reached 13 mJ with 45% efficiency when the resonator was pumped with a 2.2-mm-diameter beam from a <i>Q</i>-switched Nd:YAG laser. The influence of the cavity design on the spectral and spatial qualities of the output parametric radiation is also discussed.
© 2000 Optical Society of America
J. Hellström, V. Pasiskevicius, H. Karlsson, and F. Laurell, "High-power optical parametric oscillation in large-aperture periodically poled KTiOPO4," Opt. Lett. 25, 174-176 (2000)