The relations between the tensor components of the nonlinear susceptibilities responsible for self-action processes are measured in KDP, deuterated KDP, and LiNbO3 crystals at the Nd:YAG laser wavelength (lambda=1064 nm). The measurements are conducted on the basis of the analysis of the polarization dependences of focused radiation transmittance with the z-scan scheme. The obtained polarization dependences in KDP corresponded to the fourth-rank tensor of Kerr nonlinearity. The obtained values of nonlinear refractive indices are compared with the known experimental data.
© 2006 Optical Society of America
(190.4720) Nonlinear optics : Optical nonlinearities of condensed matter
(190.5940) Nonlinear optics : Self-action effects
(260.1180) Physical optics : Crystal optics
(300.6250) Spectroscopy : Spectroscopy, condensed matter
Ilya A. Kulagin, Rashid A. Ganeev, Renat I. Tugushev, Alexander I. Ryasnyansky, and Timurbek Usmanov, "Analysis of third-order nonlinear susceptibilities of quadratic nonlinear optical crystals," J. Opt. Soc. Am. B 23, 75-80 (2006)