Electro-Optic Coefficients in Single-Domain Ferroelectric Lithium Niobate

This paper presents the results of measurements by the Sénarmont compensator method of the dc electro-optic coefficients at a wavelength of 6328 Å and observations of electro-optic modulation at radio frequencies in single-domain crystals of lithium niobate (LiNbO3), a trigonal crystal of point group 3m. Tables of electro-optic properties and measurements are included, as well as a series of optical interference figures for various static field conditions. The magnitudes of the dc coefficients were found to be r22=2.0×10−7 cm/statvolt and |0.9r33−r13|=5.2×10−7 cm/statvolt.