Screening of singular points of vector field of phase gradient, localization of optical vortices and reconstruction of wavefront with screw dislocations

Valerii P. Aksenov, Igor V. Izmailov, Feodor Yu Kanev, Feodor A. Starikov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 optical 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.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsV.Y. Panchenko, V.S. Golubev
Volume6162
DOIs
Publication statusPublished - 2006
EventInternational Conference on Lasers, Applications, and Technologies 2005 - Laser Sensing, Imaging and Information Technologies - St. Petersburg, Russian Federation
Duration: 11 May 200515 May 2005

Other

OtherInternational Conference on Lasers, Applications, and Technologies 2005 - Laser Sensing, Imaging and Information Technologies
CountryRussian Federation
CitySt. Petersburg
Period11.5.0515.5.05

    Fingerprint

Keywords

  • Detection algorithm of singular point positions
  • Optical vortices
  • Phase reconstruction
  • Singular optics
  • Singular points
  • Wave-front dislocations

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Aksenov, V. P., Izmailov, I. V., Kanev, F. Y., & Starikov, F. A. (2006). Screening of singular points of vector field of phase gradient, localization of optical vortices and reconstruction of wavefront with screw dislocations. In V. Y. Panchenko, & V. S. Golubev (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 6162). [61620D] https://doi.org/10.1117/12.674988