DISPERSION COMPENSATION FOR A FEMTOSECOND CR-LISAF LASER

The group delay per length for Cr:LiSAF crystal has been measured, and the result indicates that the refractive index of Cr:LiSAF has a larg e error. The dispersion of a prism pair is calculated without approxim ations to be estimated in a large wavelength range. The conditions in which the group delay dispersion and third order dispersion of a femto second-Cr:LiSAF-laser cavity are simultaneously zero have been discuss ed.