Berlin 2012 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 10: Nonlinear Dynamics, Synchronisation and Chaos
DY 10.9: Vortrag
Dienstag, 27. März 2012, 11:45–12:00, MA 001
Synchronization in mutually delay-coupled semiconductor lasers and its decay due to bubbling — •Konstantin Hicke1, Jordi Tiana-Alsina2, Xavier Porte1, Miguel Soriano1, M. Carme Torrent2, Jordi Garcia-Ojalvo2, and Ingo Fischer1 — 1Instituto de Fisica Interdisciplinar y Sistemas Complejos, IFISC (UIB-CSIC), Campus Universitat de les Illes Balears, E-07122 Palma de Mallorca, Spain — 2Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Campus de Terrassa, Edif. GAIA, Rambla de Sant Nebridi s/n, Terrassa E-08222 Barcelona, Spain
Coupled semiconductor lasers are ideal testbeds to study synchronization properties of delay-coupled systems. At the same time they are promising for applications. An aspect which is therefore important is how synchronization can get lost. Here we present experimental results for the dynamics of two mutually coupled semiconductor lasers in a relay-coupling-configuration. We achieve excellent zero-lag chaos synchronization of the lasers' output intensities. Moreover, we demonstrate how the overall synchronization quality decreases with increasing pump current. We identify this to be due to an increase of the occurence of intermittent desynchronization events which we attribute to noise-induced bubbling. We point out the difference to global transverse instabilities of the synchronization and the resulting on-off intermittency. This is completed by a detailed analysis of the desynchronization events.