Abstract
The absorption spectrum of BaTiO3:Rh is measured from 400 nm to 1100 nm, there is strong absorption peak (α = 7 cm−1 at 633 nm) while at 850 nm the absorption is rather weak: α = 2 cm−1. Then, we propose an experimental investigation of the EO coefficients, for two different wavelengths corresponding to strong and weak absorption, based on an interferometric and ellipsometric assembly using application of a static electric field and leading to the measurement of the coefficients r13 and r33 separately and the linear combination rc.
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