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Two nonlinear optical processes in z-scan curves of a bleached photographic film.

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Abstract

A bleached photographic film was characterized by z-scan technique. It exhibited a negative nonlinear refractive index. This sample was fitted with the Photoinduced Thin Lens (PhTL) model. To fit exactly this sample, it was necessary two values of parameters of this model; that is, there are involved two optical nonlinear processes.

© 2016 Optical Society of America

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