title: Bubbling in delay-coupled lasers.
abstract: We theoretically study chaos synchronization of two lasers which are delay coupled via an active or a passive relay. While the lasers are synchronized, their dynamics is identical to a single laser with delayed feedback for a passive relay and identical to two delay-coupled lasers for an active relay. Depending on the coupling parameters the system exhibits bubbling, i.e., noise-induced desynchronization, or on-off intermittency. We associate the desynchronization dynamics in the coherence collapse and low-frequency fluctuation regimes with the transverse instability of some of the compound cavity's antimodes. Finally, we demonstrate how, by using an active relay, bubbling can be suppressed.
authors: Institut für Theoretische Physik, TU Berlin, Hardenbergstrasse 36, 10623 Berlin, Germany.
authors: V
authors: V
authors: Flunkert
authors: O
authors: O
authors: D'Huys
authors: J
authors: J
authors: Danckaert
authors: I
authors: I
authors: Fischer
authors: E
authors: E
authors: Schöll