Effect of Deuteration on the Quadratic Electrooptic Properties of KDP

Abstract

The isotopic effect on the magnitude of quadratic electrooptic coefficients in KDP is investigated. By employing both the Miller rule and assumption of a rough constancy of intrinsic electrooptic coefficients, one can expect these quadratic electrooptic coefficients which are related to the electric field applied in the [100] direction, i.e. the coefficients g1111, g2211 and g3311 to be in DKDP almost twice larger than that for KDP. Our measurements of the relative quadratic coefficient n03g1111-ne3g3311 in DKDP are in contradiction with the prediction. We found g1111, g2211 and g3311 to be weakly dependent on the deuteration.