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Time resolved Z-scan measurements in Nd/sup 3+/ doped YAG

The time-resolved Z-scan method has been shown to be particularly suitable to the study of ion doped solids, which present slow nonlinearity (response times /spl sim/10/sup -4/ s). In this work we used the time-resolved Z-scan technique to measure the nonlinear refractive index, n/sub 2/, in Nd/sup 3+/:YAG. We also study the saturation behavior of the Z-scan data in other to monitor the evolution of excited state population.