We present and compare two continuous-wave optical parametric oscillators based on the nonlinear crystals periodically poled LiNbO<sub>3</sub> (PPLN) and periodically poled RbTiOAsO<sub>4</sub> (PPRTA) pumped internal to a high-power, all-solid-state Nd:YVO<sub>4</sub> laser. At a diode pump power of 12 W, similar total extracted idler powers of over 440 mW were obtained from each system even though the nonlinearity of PPRTA is significantly less than that of PPLN. The spatial, power, and frequency stability of the PPRTA-based system outperformed those of the PPLN system. We attribute the poor performance of PPLN in these parameters to its susceptibility to thermal lensing.
© 2003 Optical Society of America
(140.3580) Lasers and laser optics : Lasers, solid-state
(140.3600) Lasers and laser optics : Lasers, tunable
(160.4330) Materials : Nonlinear optical materials
(190.4400) Nonlinear optics : Nonlinear optics, materials
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
David J. M. Stothard, P.-Y. Fortin, Alison Carleton, Majid Ebrahimzadeh, and Malcolm H. Dunn, "Comparison of continuous-wave optical parametric oscillators based on periodically poled LiNbO3 and periodically poled RbTiOAsO4 pumped internal to a high-power Nd:YVO4 laser," J. Opt. Soc. Am. B 20, 2102-2108 (2003)