Pattern-dislocation-type dynamical instability in 1D optical feedback Kerr media with Gaussian transverse pumping.
Phys Rev Lett
; 87(24): 244501, 2001 Dec 10.
Article
em En
| MEDLINE
| ID: mdl-11736505
ABSTRACT
We study experimentally and numerically the secondary instability corresponding to the destabilization of stationary transverse roll patterns appearing in a 1D liquid crystal layer subjected to optical feedback. This dynamical instability appears as roll dislocations in the spatiotemporal diagrams. We show that it originates from the Gaussian spatial transverse dependence of a control parameter and that its corresponding mechanism is the selection of a local unstable wave number. This instability is the optical counterpart of the ramp-induced Eckhaus instability observed in hydrodynamics.
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MEDLINE
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En
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Phys Rev Lett
Ano de publicação:
2001
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Article