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Proceedings Paper

Diffractive optical element for improving the Z-scan technique sensitivity
Author(s): R. de Saint Denis; M. Fromager; E. Cagniot; K. Ait-Ameur
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Paper Abstract

One of the most successful experimental technique for determining nonlinear properties of optical materials is the Z-scan technique. Interaction between a high intensity beam with a Kerr medium gives rise to a lensing effect that implies focusing or defocusing of the beam which is transformed into transmittance variations of a diaphragm set in the far-field. In other words, one can consider Z-scan technique as a diagnostic of beam divergence variations and its ultimate sensitivity depends on the smallest transmittance change that can be measured. In this paper we propose a new technique allowing to multiply the sensitivity of the Z-scan technique by a factor greater than one hundred. The basic idea is to "amplify" the divergence variation, by a Diffractive Optical Element.

Paper Details

Date Published: 8 May 2008
PDF: 10 pages
Proc. SPIE 6994, Photon Management III, 69940I (8 May 2008); doi: 10.1117/12.780266
Show Author Affiliations
R. de Saint Denis, ENSICAEN-CEA-UCBN (France)
M. Fromager, ENSICAEN-CEA-UCBN (France)
E. Cagniot, ENSICAEN-CEA-UCBN (France)
K. Ait-Ameur, ENSICAEN-CEA-UCBN (France)

Published in SPIE Proceedings Vol. 6994:
Photon Management III
John T. Sheridan; Frank Wyrowski, Editor(s)

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