Nonlinear optical properties of commercial semiconductor-doped glasses

We report new observations made on semiconductor-doped glasses commercially available. We have observed that the modulus of the Kerr susceptibility is proportional to the absorption coefficient below, across and above the gap. We have measured the phase of this susceptibility for various values of the excess energy. We have also observed a blue shift of the absorption edge following pulsed excitation and have measured the diameter of the crystallites to be 70–80 Å. The band-filling model is the most appropriate to account for the nonlinear properties of these glasses.