Nonlinear Optical Properties of Perfectly Polarized KIO_(3) Single Crystal

The nonlinear optical properties of a perfectly polarized KIO^single crystal were investigated.The principal refractive indices and nonlinear optical coefficients have been measured.The results are as follows:n1=1.6967,n2=1-8329,n3=1.8358 for 0.5893μm;d_(31)=1.2|d_(31)(LiIO_(3))|,d_(32)=1.8|d_(31)(LiIO_(3))|.The in tensity of the frequency-doubled light of the KIO_(3 )single crystal with 2.96 mm thickness is 1.2 times as large as that of the KTP single crystal with the same thickness.