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Proceedings Paper

Characterization of thermo-optic nonlinearities in glass filters using the Z-scan technique
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Paper Abstract

For nonlinear optical materials in which the excitation diffuses significantly during the time scale of measurement the usual analysis of a Z-scan experiment must be modified. We develop a simple first order theory based on a quadratic rather than Gaussian spatial modulation of the index of refraction. This leads to asymmetric Z-scan curves. We apply this theory to the study of the thermal-optic effect in a simple neutral density filter. A significant spatial phase chirp can be induced in these filters at modest intensities. The observed transmission curves agree well with the quadratic theory.

Paper Details

Date Published: 24 July 2002
PDF: 9 pages
Proc. SPIE 4751, ICONO 2001: Nonlinear Optical Phenomena and Nonlinear Dynamics of Optical Systems, (24 July 2002);
Show Author Affiliations
Alexander N. Korolevich, National Academy of Sciences of Belarus and Univ. do Minho (Belarus)
Michael Scott Belsley, Univ. do Minho (Portugal)

Published in SPIE Proceedings Vol. 4751:
ICONO 2001: Nonlinear Optical Phenomena and Nonlinear Dynamics of Optical Systems
Konstantin N. Drabovich; Nikolai S. Kazak; Vladimir A. Makarov; Alexander P. Voitovich, Editor(s)

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