Determination of topological charges of polychromatic optical vortices

We introduce a simple, single beam method for determination of the topological charge of polychromatic optical vortices. It is based on astigmatic transformation of singular optical beams, where the intensity pattern of a vortex beam acquires a form of dark stripes in the focal plane of a cylindrica...

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Published in:Optics express 2009-12, Vol.17 (26), p.23374-23379
Main Authors: Denisenko, Vladimir, Shvedov, Vladlen, Desyatnikov, Anton S, Neshev, Dragomir N, Krolikowski, Wieslaw, Volyar, Alexander, Soskin, Marat, Kivshar, Yuri S
Format: Article
Language:English
Subjects:
Color
Computer Simulation
Light
Models, Theoretical
Refractometry - methods
Scattering, Radiation
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cited_by cdi_FETCH-LOGICAL-c394t-f13b20bcab0e4cefca6f6640df998cb53e9c802cdae06cb22d20068b692c7e293
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container_title Optics express
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description We introduce a simple, single beam method for determination of the topological charge of polychromatic optical vortices. It is based on astigmatic transformation of singular optical beams, where the intensity pattern of a vortex beam acquires a form of dark stripes in the focal plane of a cylindrical lens. The number of the dark stripes is equal to the modulus of the vortex topological charge, while the stripe tilt indicates the charge sign. We demonstrate experimentally the effectiveness of this technique by revealing complex topological structure of polychromatic singular beams.
doi_str_mv 10.1364/oe.17.023374
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subjects Color
Computer Simulation
Light
Models, Theoretical
Refractometry - methods
Scattering, Radiation
title Determination of topological charges of polychromatic optical vortices
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