Synchrotron reflectivity spectra and optical properties of the non-linear KTiOPO <sub>4</sub> crystal
The spectra of two sets of optical functions for KTiOPO <sub>4</sub> crystal were determined in a wide region of fundamental absorption. The calculations were carry out on the basis of the known experimental reflectivity spectra in the region 0 to 18 eV for the two polarizations E || X and E || Z. Their main peculiarities and the influence of the polarization were established.