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Proceedings Paper

Chain topological reactions in developing random light fields
Author(s): Vasiliy Vasil'ev; Vlad Ponevchinsky; Marat Soskin
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Paper Abstract

It was investigated development of singular generic elliptic speckle patterns generated and driven by laser beam in LiNbO3:Fe crystal by quick-action stokes polarimetry. It is realized through totality of local topological transitions in random space-time point governed by smoothly varying control parameter (amplitude of funnel bottom in the place of forthcoming vortices pair nucleation). Vortices pair nucleates when zero amplitude value is reached. Total development of singular light fields proceeds through the direct and chain topological reactions. Direct reactions possess short spacetime loop trajectories. Chain reaction trajectory consists from sequence of singularities pair nucleation and annihilation with singularities from other pairs. They can finish generically on field borders only, don't touch and intersect. Existing wave front singularities are arranged in the topological network which plays role of its skeleton and keeps integrity during field development. Its genesis was realized in the speckle field appeared after PDLC cell with variable applied constant electric field. Nucleation of first optical vortices pairs was observed firstly.

Paper Details

Date Published: 6 February 2009
PDF: 11 pages
Proc. SPIE 7227, Complex Light and Optical Forces III, 72270A (6 February 2009); doi: 10.1117/12.807696
Show Author Affiliations
Vasiliy Vasil'ev, Institute of Physics (Ukraine)
Vlad Ponevchinsky, Institute of Physics (Ukraine)
Marat Soskin, Institute of Physics (Ukraine)

Published in SPIE Proceedings Vol. 7227:
Complex Light and Optical Forces III
Enrique J. Galvez; David L. Andrews; Jesper Glückstad, Editor(s)

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