Photorefractive two beam coupling characterization of a Barium-Calcium titanate crystal

Sylvie Bernhardt (1) , Philippe Delaye (1) , H. Veenhuis (2) , D. Rytz (3) , Gérald Roosen (1)

1 Laboratoire Charles Fabry de l'Institut d'Optique / Manolia
2 Fachbereich Physik [Osnabrück]
3 Forschunginstitute für Mineralische und Metallische Werkstoffe

We present two beam coupling characterization of Ba0.77Ca0.23TiO3, a ferroelectric material with no phase transition around room temperature that shows high photorefractive gain (7cm-1 with ordinary polarization and 15cm-1 with extraordinary polarization). We measure the electrooptic coefficients of Ba0.77Ca0.23TiO3. These values are compared to estimated theoretical values, calculated using a model that allows to deduce the tetragonal phase parameter (Pockels and piezoelectrics coefficients) from the parameters of the high temperature cubic phase (Kerr and electrostriction coefficients)

Domains: Optics [physics.optics]

Sylvie Bernhardt, Philippe Delaye, H. Veenhuis, D. Rytz, Gérald Roosen. Photorefractive two beam coupling characterization of a Barium-Calcium titanate crystal. Applied Physics B - Laser and Optics, 2000, 70, pp.789-795. ⟨10.1007/s003400050010⟩. ⟨hal-00686038⟩