Calculations of optimum phase match parameters for the biaxial crystal KTiOPO4

Abstract

The expression for the optimum phase matching angle for the biaxial crystal KTiOPO4 (KTP) is presented and numerically calculated. The theoretical effective nonlinear coefficient, walk-off angle, and conversion efficiency are determined. The results provide some theoretical and practical guidance for optimum operation of biaxial crystals, with specific numerical calculations for KTP.