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Related Experiment Videos

Collapse of optical vortices.

Luat T Vuong1, Taylor D Grow, Amiel Ishaaya

  • 1School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA.

Physical Review Letters
|May 23, 2006
PubMed
Summary

Optical vortices in Kerr media self-focus and collapse into a self-similar profile. This profile becomes unstable, leading to multiple filaments, matching theoretical predictions based on power and topological charge.

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Area of Science:

  • Nonlinear Optics
  • Laser Physics
  • Photonics

Background:

  • Optical vortices exhibit unique phase structures.
  • Self-focusing is a key phenomenon in nonlinear optics.
  • Kerr media are essential for nonlinear optical effects.

Purpose of the Study:

  • Investigate the self-focusing dynamics of optical vortices in Kerr media.
  • Analyze the stability of the self-focused vortex profile.
  • Predict the conditions leading to multiple filamentation.

Main Methods:

  • Theoretical analysis of vortex self-focusing.
  • Experimental investigation using laser propagation.
  • Mathematical modeling of azimuthal modulational instability.

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Main Results:

  • Observed collapse to a self-similar profile.
  • Identified instability to azimuthal perturbations.
  • Predicted and experimentally verified multiple-filamentation patterns.

Conclusions:

  • The self-focusing of optical vortices is well-described by theory.
  • Azimuthal instability dictates the formation of multiple filaments.
  • Power and topological charge are key parameters governing vortex beam propagation.