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

Research output: Contribution to journalArticle

80 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 languageEnglish
Pages (from-to)23374-23379
Number of pages6
JournalOptics Express
Volume17
Issue number26
DOIs
Publication statusPublished - Dec 21 2009
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Fingerprint Dive into the research topics of 'Determination of topological charges of polychromatic optical vortices'. Together they form a unique fingerprint.

Cite this