Cubic parametric frequency generation in rutile single crystal

We experimentally investigated third harmonic generation in TiO(2) rutile single crystal, including phase-matching and cubic nonlinearity. We refined the dispersion equations of rutile and we demonstrated that this crystal allows angular non critical phase-matching at useful wavelengths, with a figure of merit 7.5 times that of KTiOPO(4). The measured cubic non linear coefficient and the corresponding Miller coefficients are : chi(16) =5.0x10(-21) m(2/)V(2) at 613.2 nm and Delta16 = 3.5x10(-24) m(2/)V(2). These results are used to predict the phase-matching conditions and the efficiency of triple photon generation in rutile.