High frequency response and wavelength dispersion of the linear electro-optic effect in PZN-PT (88/12) single crystal

International audienceWe have characterized the wavelength dispersion of the high- and low-frequency values of the linear electro-optic coefficient r c = r 33−(n o/n e)3 r 13 of poled 0.88 Pb(Zn1/3Nb2/3)O3–0.12 PbTiO3 single crystal. The measurements have been investigated as a function of the laser wavelength from 0.465 to 1.32 μm. Clamped r S and unclamped r T values of the electro-optic coefficient as well as the acoustic contribution r a have been established. We obtained a ratio of r S/r T = 30%, which is independent of the wavelength of the light beam. The value of r S c at the wavelength of 633 nm was found to be equal to 50±5 pm/V, which is a rather high value