2ND HARMONIC-GENERATION AND SUM FREQUENCY MIXING OF DUAL WAVELENGTH ND-YALO3 LASER IN FLUX GROWN KTIOPO4 CRYSTAL

On the basis of accurately measured refractive indexes, we have obtained the Sellmeier's equations for flux grown KTiOPO4 (KTP) crystal and used them to calculate the phase matched angles (theta(m), phi(m)) and effective nonlinear coefficients (d(eff)) for type I and III second harmonic generation (SHG) and sum frequency mixing (SFM) of radiations at 1.0795 and 1.3414-mu-m. The optimum phase matching condition for 1.0795 and 1.3414-mu-m SHG are that theta(m) = 86.88 and 58.88-degrees, respectively, in an XZ plane (phi = 0) and for SMF of 1.0795 and 1.3414-mu-m in the same plane 76.02-degrees. The corresponding d(eff) values calculated from theta(m)'s are 18.07 x 10(-9), and 17.42 x 10(-9) esu.