Dispersion of quadratic optical susceptibility of lithium niobate and barium sodium niobate crystals
Dorozhkin L.M., Kizel' V.A., Shigorin V.D., Shipulo G.N.
We measured, for the first time, the dispersion of the components χ3, and χη of single-crystal lithium niobate and barium sodium niobate in the visible and near-ultraviolet regions of the spectrum. It is shown that the dispersion is determined by the dependence of the dispersion of the quadratic polarizability of the Nb-O bonds on their length.