Determination of topological charges of polychromatic optical vortices

Vladimir Denisenko; Vladlen Shvedov; Anton S. Desyatnikov; Dragomir N. Neshev; Wieslaw Krolikowski; Alexander Volyar; Marat Soskin; Yuri S. Kivshar

doi:10.1364/OE.17.023374

Determination of topological charges of polychromatic optical vortices

Vladimir Denisenko^*, Vladlen Shvedov, Anton S. Desyatnikov, Dragomir N. Neshev, Wieslaw Krolikowski, Alexander Volyar, Marat Soskin, Yuri S. Kivshar

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

134 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	23374-23379
Number of pages	6
Journal	Optics Express
Volume	17
Issue number	26
DOIs	https://doi.org/10.1364/OE.17.023374
Publication status	Published - 21 Dec 2009

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abstract = "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.",

author = "Vladimir Denisenko and Vladlen Shvedov and Desyatnikov, {Anton S.} and Neshev, {Dragomir N.} and Wieslaw Krolikowski and Alexander Volyar and Marat Soskin and Kivshar, {Yuri S.}",

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AU - Denisenko, Vladimir

AU - Shvedov, Vladlen

AU - Desyatnikov, Anton S.

AU - Neshev, Dragomir N.

AU - Krolikowski, Wieslaw

AU - Volyar, Alexander

AU - Soskin, Marat

AU - Kivshar, Yuri S.

PY - 2009/12/21

Y1 - 2009/12/21

N2 - 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.

AB - 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.

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JF - Optics Express

IS - 26

ER -

Determination of topological charges of polychromatic optical vortices

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