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High-speed Particle Image Velocimetry Near Surfaces
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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
PubMed
Summary
This summary is machine-generated.

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.

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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.