Pattern-dislocation-type dynamical instability in 1D optical feedback Kerr media with gaussian transverse pumping

被引:21
作者
Louvergneaux, E [1 ]
机构
[1] Univ Sci & Technol Lille, Lab Phys Lasers Atomes & Mol, UMR 8523, Ctr Etud & Rech Lasers & Applicat, F-59655 Villeneuve Dascq, France
关键词
D O I
10.1103/PhysRevLett.87.244501
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
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.
引用
收藏
页码:244501 / 1
页数:4
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