We demonstrate the application of electromodulated absorption experiments on poled polymer films. Information on the polar order in guest host materials could be deduced precisely by knowing only the mesomeric moment of the 4’-dimethylamino-4-nitrostilbene dye molecule. The dispersion of the real and imaginary parts of the non-linear optical susceptibility chi((2)) could be obtained by applying the Kramers-Kronig formalism to the electroabsorption data. The result was in excellent agreement with theoretical two-level calculations in combination with the experimental information on the polar ordering. Furthermore, the contribution of the piezoelectric effect to the electroabsorption signal is proven to be negligible. The results show that electromodulated absorption is a powerful method for obtaining the dispersion of the pure electro-optical response described by chi(XXZ)((2))( -omega,omega,0) over a large frequency range provided that the second order non-linearity is dominated by electronic transitions accessible by optical absorption experiments.