Control of dynamical instability in semiconductor quantum nanostructures diode lasers: Role of phase-amplitude coupling
1 Femtosecond Laser Laboratory, Department of Physical Sciences, Indian Institute of Science Education and Research (IISER) Mohali 140306, Punjab, India
2 Télécom ParisTech, Ecole Nationale des Supérieure des Télécommunications de Paris, Laboratoire CNRS 5141, 46 rue Barrault, 75634 Paris Cedex 13, France
Revised: 3 May 2013
Published online: 11 July 2013
We numerically investigate the complex nonlinear dynamics for two independently coupled laser systems consisting of (i) mutually delay-coupled edge emitting diode lasers and (ii) injection-locked quantum nanostructures lasers. A comparative study in dependence on the dynamical role of α parameter, which determine the phase-amplitude coupling of the optical field, in both the cases is probed. The variation of α lead to conspicuous changes in the dynamics of both the systems, which are characterized and investigated as a function of optical injection strength η for the fixed coupled-cavity delay time τ. Our analysis is based on the observation that the cross-correlation and bifurcation measures unveil the signature of enhancement of amplitude-death islands in which the coupled lasers mutually stay in stable phase-locked states. In addition, we provide a qualitative understanding of the physical mechanisms underlying the observed dynamical behavior and its dependence on α. The amplitude death and the existence of multiple amplitude death islands could be implemented for applications including diode lasers stabilization.
© EDP Sciences, Springer-Verlag, 2013