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Proceedings Paper

Nonlinear mixing of optical vortices
Author(s): S. Residori; U. Bortolozzo; F. Lenzini; F. T. Arecchi
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Paper Abstract

We present optical vortex beams interaction via degenerate two-wave mixing in liquid crystal light-valve, LCLV. The LCLV is made by combining a transparent photosensitive substrate with a nematic liquid crystal and displays a large Kerr-like effect. Being characterized by a large transverse size and spatial homogeneity, the LCLV allows performing nonlinear mixing experiments with several vortex beams and testing the interaction of different topological charges. We show that the wave-mixing occurring in the LCLV leads to the exchange of topological charge between vortex and to a cascaded generation of vortex beams. A mean-field model is developed and is shown to account for the charge selection rules observed after the mixing process. Fractional charges are demonstrated to participate to the wave-mixing in a robust way, following the same charge selection rules as for integer charges.

Paper Details

Date Published: 10 February 2012
PDF: 7 pages
Proc. SPIE 8274, Complex Light and Optical Forces VI, 82740T (10 February 2012); doi: 10.1117/12.909196
Show Author Affiliations
S. Residori, INLN, CNRS, Univ. de Nice-Sophia Antipolis (France)
U. Bortolozzo, INLN, CNRS, Univ. de Nice-Sophia Antipolis (France)
F. Lenzini, INLN, CNRS, Univ. de Nice-Sophia Antipolis (France)
Univ. di Firenze (Italy)
F. T. Arecchi, Univ. di Firenze (Italy)

Published in SPIE Proceedings Vol. 8274:
Complex Light and Optical Forces VI
Enrique J. Galvez; David L. Andrews; Jesper Glückstad; Marat S. Soskin, Editor(s)

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