Nonlinear dynamics of two-color optical vortices in lithium niobate crystals

Opt Express. 2008 Apr 14;16(8):5406-20. doi: 10.1364/oe.16.005406.

Abstract

We study experimentally the nonlinear dynamics of two-color optical vortex beams in the presence of second-harmonic generation combined with the effects of photo- and thermal refraction, as well as self- and induced-phase modulation. We use an iron-doped lithium niobate crystal as a nonlinear medium for the vortex propagation and observe experimentally, depending on the laser wavelength, a decay of a double-charge vortex, splitting and reshaping of background beam, pattern formation, and controllable nonlinear rotation of a vortex pair.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Color*
  • Computer Simulation
  • Computer-Aided Design*
  • Crystallization / methods*
  • Equipment Design
  • Equipment Failure Analysis
  • Models, Theoretical*
  • Niobium / chemistry*
  • Niobium / radiation effects
  • Nonlinear Dynamics
  • Oxides / chemistry*
  • Oxides / radiation effects
  • Refractometry / instrumentation*
  • Refractometry / methods

Substances

  • Oxides
  • Niobium
  • lithium niobate