Control of dynamical instability in semiconductor quantum nanostructures diode lasers: role of phase-amplitude coupling

TL;DR

This study numerically explores how phase-amplitude coupling influences the nonlinear dynamics and stability of coupled diode and quantum nano-structure lasers, revealing mechanisms for laser stabilization.

Contribution

It provides a comparative analysis of the dynamical effects of the alpha parameter in coupled diode and quantum nano-structure lasers, highlighting amplitude death phenomena.

Findings

Variation of alpha significantly alters laser dynamics.

Amplitude death islands are enhanced by phase-amplitude coupling.

Stable phase-locked states can be achieved for stabilization.

Abstract

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 nano-structures lasers. A comparative study in dependence on the dynamical role of alpha parameter, which determine the phase-amplitude coupling of the optical field, in both the cases is probed. The variation of alpha lead to conspicuous changes in the dynamics of both the systems, which are characterized and investigated as a function of optical injection strength for the fixed coupled-cavity delay time. 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 alpha. The amplitude death and the existence of multiple amplitude death islands could be implemented for applications including diode lasers stabilization.