Quasiperiodic synchronization for two delay-coupled semiconductor lasers

A. Hohl, A. Gavrielides, T. Erneux, V. Kovanis

Research output: Contribution to journalArticlepeer-review

56 Citations (Scopus)


The dynamical behavior of two mutually coupled semiconductor lasers is studied experimentally, numerically, and analytically for weak coupling. The lasers have dissimilar relaxation oscillation frequencies and intensities, and their mutual coupling strength may be asymmetric. We find experimentally that the lasers preferentially entrain to the relaxation oscillation frequency of either one of the lasers. But quasiperiodic synchronization, where both relaxation oscillation frequencies appear, is possible. We show that there exist two distinct mechanisms leading to these regimes corresponding to either a bifurcation to a mixed-mode solution or a bifurcation induced by the delay of the mutually injected signal. However, only the second transition can be observed experimentally if the injection strength is continuously increased from zero.

Original languageEnglish
Pages (from-to)3941-3949
Number of pages9
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number5
Publication statusPublished - Jan 1 1999
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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