We show that a <i>Z</i>-transform-based time-response analysis of the electro-optical response of a crystal to a step voltage with a short rise time allows one to obtain the dispersion of the electro-optical coefficients over a wide frequency range. We describe the method employed and present the results obtained for the main electro-optic coefficients (<i>r</i><sub>22</sub>, <i>r</i><sub>61</sub>, and <i>r</i><sub><i>c</i></sub>) of a standard LiNbO<sub>3</sub> crystal. We also show that this method is able to provide even small values of the electro-optic coefficients as well as the dispersion within a wide frequency range, which is limited only by the rise time of the step voltage.
© 2003 Optical Society of America
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(160.2100) Materials : Electro-optical materials
(160.3730) Materials : Lithium niobate
(160.4760) Materials : Optical properties
(260.2130) Physical optics : Ellipsometry and polarimetry
Mustapha Abarkan, Jean Paul Salvestrini, Michel Aillerie, and Marc D. Fontana, "Frequency Dispersion of Electro-Optical Properties over a Wide Range by Means of Time-Response Analysis," Appl. Opt. 42, 2346-2353 (2003)