Abstract

We present a theoretical analysis of beam propagation in thick nonlinear media by using the Gaussian decomposition method and considering a thick medium as a stack of thin media. Simple analytic solutions of Z-scan characteristics and optical limiting with thick nonlinear media are obtained. Comparisons of these results with those obtained by use of a distributed-lens model and Gaussian–Laguerre mode decomposition are made. Good agreement is obtained with a distributed-lens model.

© 1995 Optical Society of America

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