Sellmeier and thermo-optic dispersion formulas for KTP

KTP has been found to be phase matchable for type-2 second-harmonic generation of the third harmonics of the CO2 laser wavelengths at 9.2714 and 9.5525 mum at 20.0 degreesC. The resulting angle and temperature-tuning data combined with the literature values of the Nd:YAG laser-pumped optical parametric oscillator were used to improve the Sellmeier equations and the thermo-optic dispersion formula that reproduce well the temperature-tuned 90degrees phase-matching conditions of the flux-grown crystals. Applications to quasi phase matching are presented. (C) 2002 Optical Society of America.