Conical pumping was used in a periodically poled KTiOPO<sub>4</sub> optical parametric oscillator for singly resonant idler generation in a nearly diffraction-limited axial beam. A single signal—idler pair was generated over the whole tuning range by use of asymmetric reflectivity of the OPO mirrors. Pump depletion of 40% and total conversion efficiency of 27% were obtained. Additional OPO tuning capability was demonstrated by adjustment of the angle of the conical pump beam.
© 2000 Optical Society of America
(190.4400) Nonlinear optics : Nonlinear optics, materials
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(230.4320) Optical devices : Nonlinear optical devices
V. Pasiskevicius, H. Karlsson, J. A. Tellefsen, F. Laurell, R. Butkus, A. Piskarskas, V. Smilgevičius, and A. Stabinis, "Singly resonant optical parametric oscillator in periodically poled KTiOPO4 pumped by a Bessel beam," Opt. Lett. 25, 969-971 (2000)