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Proceedings Paper

Screening of singular points of vector field of phase gradient, localization of optical vortices and reconstruction of wavefront with screw dislocations
Author(s): Valerii P. Aksenov; Igor V. Izmailov; Feodor Yu. Kanev; Feodor A. Starikov
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Paper Abstract

The algorithms for screening singular points of the phase gradient vector field are developed, where vector field components can be measured with a Shack-Hartmann wavefront sensor or shearing interferometer. Special attention is focused on the singular points that allow localization of optical vortices (wavefront dislocations). Determination of the coordinates and the topological vortex charges is of special importance in optical vortex interferometry, in operation of optjcal communication devices that encode information by means of optical vortices, and for reconstruction of phase distribution of optical beams that propagate in a medium with dislocations. On basis of numerical modeling, accuracy of the algorithm is verified, comparison with other algorithms executed, and its advantages and drawbacks are analyzed. Performance results are presented of the singular wavefront recovery algorithm, whose operating requirement is preliminary detection of optical vortex dislocations.

Paper Details

Date Published: 9 June 2006
PDF: 12 pages
Proc. SPIE 6162, International Conference on Lasers, Applications, and Technologies 2005: Laser Sensing, Imaging, and Information Technologies, 61620D (9 June 2006); doi: 10.1117/12.674988
Show Author Affiliations
Valerii P. Aksenov, Institute of Atmospheric Optics (Russia)
Igor V. Izmailov, Tomsk State Univ. (Russia)
Feodor Yu. Kanev, Institute of Atmospheric Optics (Russia)
Feodor A. Starikov, Russian Federal Nuclear Ctr. (Russia)


Published in SPIE Proceedings Vol. 6162:
International Conference on Lasers, Applications, and Technologies 2005: Laser Sensing, Imaging, and Information Technologies

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