Abstract
RbTiOAsO4 (RTA) has been found to be phase matchable for type-2 second-harmonic generation (SHG) from 0.5725 to 1.80μm at 20.0°C. By comparing these experimental results and the published 90°phase-matched parametric oscillator (OPO) tuning points given by Reid et al. and Scheidt et al. with two differentSellmeier's equations of Cheng et al. and Fenimore et al., the latter was found to reproduce well the experimental points of Scheidt et al. as well as our data points. In addition, the absolute values of the nonlinear optical constants of this crystal are discussed.
