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High-speed Particle Image Velocimetry Near Surfaces
Published on: June 24, 2013
Information content of optical vortex fields
Ashok Kumar1, Shashi Prabhakar, Pravin Vaity
1Physical Research Laboratory, Navrangpura, Ahmedabad 380 009, India. ashokk@prl.res.in
Optics Letters
|April 12, 2011
Summary
This study quantifies the information content of optical vortices using spatial coherence and Wigner distribution functions. Experimental findings confirm theoretical predictions for these vortex beams.
Area of Science:
- * Optics and Photonics
- * Quantum Information Science
Background:
- * Optical vortices carry orbital angular momentum, enabling advanced applications.
- * Characterizing their spatial coherence and information content is crucial for understanding their behavior.
Purpose of the Study:
- * To experimentally and theoretically investigate the spatial coherence and Wigner distribution functions of optical vortices.
- * To quantify the information content of optical vortices using information entropy.
- * To compare the information content of optical vortices with that of a Gaussian beam.
Main Methods:
- * Theoretical analysis of spatial coherence and Wigner distribution functions.
- * Experimental measurement of these functions for optical vortices.
- * Calculation of information entropy from spatial coherence data.
Main Results:
- * Spatial coherence and Wigner distribution functions were determined for various optical vortex orders.
- * Information entropy was successfully derived from spatial coherence functions.
- * Optical vortices demonstrated distinct information content compared to Gaussian beams.
Conclusions:
- * The study validates theoretical models for optical vortex characterization.
- * Information entropy serves as a reliable measure of information content in optical vortices.
- * Findings contribute to the fundamental understanding and application of optical vortices.
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