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 language | English |
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Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |
Editors | V.Y. Panchenko, V.S. Golubev |
Volume | 6162 |
DOIs | |
Publication status | Published - 2006 |
Event | International Conference on Lasers, Applications, and Technologies 2005 - Laser Sensing, Imaging and Information Technologies - St. Petersburg, Russian Federation Duration: 11 May 2005 → 15 May 2005 |
Other
Other | International Conference on Lasers, Applications, and Technologies 2005 - Laser Sensing, Imaging and Information Technologies |
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Country | Russian Federation |
City | St. Petersburg |
Period | 11.5.05 → 15.5.05 |
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