Pattern formation and competition in nonlinear optics

Year: 1996

Authors: Residori S., Ramazza PL., Pampaloni E., Arecchi F.T.

Autors Affiliation: Istituto Nazionale di Ottica, Largo E. Fermi 6, 50125 Firenze, Italy

Abstract: Recently we have observed two-dimensional periodic and quasiperiodic structures in the transverse profile of an optical beam circulating in a feedback loop which contains a The symmetries observed depend not only on the interaction between light and nonlinear medium, but also on a nonlocality due to beam rotation in tile feedback loop. The linear stability analysis of our model shows the existence of many unstable bands of transverse wavevectors. Close to threshold, predictions are qualitatively and quantitatively confirmed by the experiment. When the intensity threshold values are almost the same for the two principal bands, structures with different wavenumbers arise above threshold. These modes compete with a very complex dynamics. We have started to study this behavior by means of suitable indicators. As a first indicator ire have individuated the fraction of light power distributed on tile first band respect to that one distributed oil both.

Journal/Review: JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS

Volume: 5 (2)      Pages from: 367  to: 386

KeyWords: SINGLE FEEDBACK MIRROR; LIQUID-CRYSTAL; SYMMETRY; TRANSITION; WAVES
DOI: 10.1142/S0218863596000234

Citations: 6
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