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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 12 — Jun. 13, 2005
  • pp: 4379–4389

Counterpropagating optical vortices in photorefractive crystals

D. Jović, D. Arsenović, A. Strinić, M. Belić, and M. Petrović  »View Author Affiliations

Optics Express, Vol. 13, Issue 12, pp. 4379-4389 (2005)

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We present a comprehensive numerical study of (2+1)D counter-propagating incoherent vortices in photorefractive crystals, in both space and time. We consider a local isotropic dynamical model with Kerr-type saturable nonlinearity, and identify the corresponding conserved quantities. We show, both analytically and numerically, that stable beam structures conserve angular momentum, as long as their stability is preserved. As soon as the beams loose stability, owing to radiation or non-elastic collisions, their angular momentum becomes non-conserved. We discover novel types of rotating beam structures that have no counterparts in the copropagating geometry. We consider the counterpropagation of more complex beam arrangements, such as regular arrays of vortices. We follow the transition from a few beam propagation behavior to the transverse pattern formation dynamics.

© 2005 Optical Society of America

OCIS Codes
(190.5330) Nonlinear optics : Photorefractive optics
(190.5530) Nonlinear optics : Pulse propagation and temporal solitons

ToC Category:
Research Papers

Original Manuscript: April 18, 2005
Revised Manuscript: May 24, 2005
Published: June 13, 2005

D. Jovi�?, D. Arsenovi�?, A. Strini�?, M. Beli�?, and M. Petrovi�?, "Counterpropagating optical vortices in photorefractive crystals," Opt. Express 13, 4379-4389 (2005)

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