Defects and Spacelike Properties of Delayed Dynamical Systems

G Giacomelli, R Meucci, A Politi, F T Arecchi

Research output: Contribution to journalArticlepeer-review

92 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)1099-1102
Number of pages4
JournalPhysical Review Letters
Issue number8
Publication statusPublished - 22 Aug 1994


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