Modulation Instability and Pattern Formation in Spatially Incoherent Light Beams
Publication date
2000-05
Document type
Research article
Author
Organisational unit
Universität Osnabrück
Scopus ID
Pubmed ID
arXiv ID
Publisher
American Association for the Advancement of Science
Series or journal
Science
ISSN
Periodical volume
290
Periodical issue
5491
First page
495
Last page
498
Part of the university bibliography
Nein
Language
English
Abstract
We present the first experimental observation of modulation instability of
partially spatially incoherent light beams in non-instantaneous nonlinear
media. We show that even in such a nonlinear partially coherent system (of
weakly-correlated particles) patterns can form spontaneously. Incoherent MI
occurs above a specific threshold that depends on the beams' coherence
properties (correlation distance), and leads to a periodic train of
one-dimensional (1D) filaments. At a higher value of nonlinearity, incoherent
MI displays a two-dimensional (2D) instability and leads to self-ordered arrays
of light spots.
partially spatially incoherent light beams in non-instantaneous nonlinear
media. We show that even in such a nonlinear partially coherent system (of
weakly-correlated particles) patterns can form spontaneously. Incoherent MI
occurs above a specific threshold that depends on the beams' coherence
properties (correlation distance), and leads to a periodic train of
one-dimensional (1D) filaments. At a higher value of nonlinearity, incoherent
MI displays a two-dimensional (2D) instability and leads to self-ordered arrays
of light spots.
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