Z-scan measurements in saturable nonlinear refraction media

E. Tenorio; Tomaz Catunda

doi:10.1117/12.354911

19 July 1999 Z-scan measurements in saturable nonlinear refraction media

E. Tenorio, Tomaz Catunda

Proceedings Volume 3749, 18th Congress of the International Commission for Optics; (1999) https://doi.org/10.1117/12.354911
Event: ICO XVIII 18th Congress of the International Commission for Optics, 1999, San Francisco, CA, United States

Abstract

The well-known Z-scan tecimique has been extensively applied to the study of large class of nonlinear materials. In some cases, particularly in optical limiters applications, it is important to study the nonlinearity in the high intensity regime where most material's nonlinear properties saturate with the light intensity. This saturation effect causes a change in the nonsaturated gaussian refractive index profile and consequently the usual Z-scan theory can not be used. We have studied this problem calculating the far-field pattern of the beam, transmitted by a nonlinear material, using the Kirchhoff-Fraunhofer diffraction integral. We also performed Zscan experiments in chromium doped saturable absorbers ruby, alexandrite and GdAlO3:Cr3. We believe that these materials are very suitable to this study because they present high saturable nonlinear refractive index, the experiments can be made with Ar laser in the cw regime and their properties are very well characterized in previous works'.

Citation Download Citation

E. Tenorio and Tomaz Catunda "Z-scan measurements in saturable nonlinear refraction media", Proc. SPIE 3749, 18th Congress of the International Commission for Optics, (19 July 1999); https://doi.org/10.1117/12.354911

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