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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 26 — Dec. 21, 2009
  • pp: 23374–23379

Determination of topological charges of polychromatic optical vortices

Vladimir Denisenko, Vladlen Shvedov, Anton S. Desyatnikov, Dragomir N. Neshev, Wieslaw Krolikowski, Alexander Volyar, Marat Soskin, and Yuri S. Kivshar  »View Author Affiliations


Optics Express, Vol. 17, Issue 26, pp. 23374-23379 (2009)
http://dx.doi.org/10.1364/OE.17.023374


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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.

© 2009 Optical Society of America

OCIS Codes
(260.1180) Physical optics : Crystal optics
(260.6042) Physical optics : Singular optics

ToC Category:
Physical Optics

History
Original Manuscript: August 24, 2009
Revised Manuscript: November 19, 2009
Manuscript Accepted: December 4, 2009
Published: December 7, 2009

Citation
Vladimir Denisenko, Vladlen Shvedov, Anton S. Desyatnikov, Dragomir N. Neshev, Wieslaw Krolikowski, Alexander Volyar, Marat Soskin, and Yuri S. Kivshar, "Determination of topological charges of polychromatic optical vortices," Opt. Express 17, 23374-23379 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-26-23374


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