Defects and spacelike properties of delayed dynamical-systems

Year: 1994

Authors: Giacomelli G., Meucci R., Politi A., Arecchi F.T.

Autors Affiliation: Istituto Nazionale di Ottica, Largo E. Fermi 6, 50125 Firenze, Italy;
ITIS “Tullio Buzzi”, Prato, Italy;
INFN, Sezione di Firenze, Firenze, Italy;
Dipartimento di Fisica, Università di Firenze, Firenze, Italy

Abstract: In a laser with delayed feedback operating in an oscillatory regime, phase defects appear for delays longer than the oscillation period. These defects are visualized by rearranging the data in a two-dimensional representation. Two distinct disordered phases are observed, one of weak turbulence characterized by phase fluctuations, and one of highly developed turbulence characterized by a constant density of defects. The transition between the two regimes is analyzed by studying the dependence of the defect lifetime on the delay. The experimental findings are modeled via a generalized Landau equation which includes a delayed coupling.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 73 (8)      Pages from: 1099  to: 1102

KeyWords: Chaotic attractors; Feedback
DOI: 10.1103/PhysRevLett.73.1099

Citations: 87
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