Abstract
A femtosecond optical Kerr experiment was conducted and the effect of photodarkening on the nonlinear optical properties of a CdS x Se 1− x doped glass was studied. The experimental results show that the intensity of the optical Kerr signal for the fresh glass investigated is proportional to the third-power of the input light intensity, which agrees well with the theoretical analysis of two-wave mixing. After undergoing photodarkening, the nonlinear optical characteristic of the glass is changed and an almost linear dependence of the optical Kerr signal intensity on the input light intensity is demonstrated. This study is significant for the applications of these glasses.
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