Abstract

A rigorous extension of the z-scan formalism is provided for systems with two or more simultaneous nonlinear refractive effects. The on-axis energy transmission of closed-aperture z-scan measurements is calculated for a wide range of expressions for the nonlinear phase. It is shown that in general cases the quantity best suited for distinguishing between simultaneous effects is the slope of the normalized transmission at focus. The results are applied to resonant systems with simultaneous excited-state refraction and optical Kerr effects.

© 1995 Optical Society of America

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