Linear And Nonlinear Optical Properties Of The Piezoelectric Crystal Alpha-Geo2

We report the first measurements of phase-matching angles for second-harmonic generation, sum- and difference-frequency generations performed over the transparency range of the uniaxial alpha-GeO2 crystal. A simultaneous fit of these data provided dispersion equations. The optical damage threshold and the magnitude of the nonlinear coefficient d(11) are also determined. We found vertical bar d(11)(GeO2) (0.67 mu m)vertical bar = 0.76 +/- 0.09 pm/V. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement