title: Self-sustained pulsations in a quantum-dot laser.
abstract: We analyze a delay differential equation for the amplitude of the electrical field in order to understand recent experimental observations of low-frequency oscillations in a QD laser. The laser contains no saturable absorber section and exhibits no relaxation oscillations. We investigate the problem both analytically and numerically. We show that there exists a homoclinic bifurcation from a cavity mode that is responsible for the generation of low-frequency pulsating oscillations. We discuss the role of optothermal effects in the formation of the pulsed dynamics.
authors.affiliation: National Research University of Information Technologies, Mechanics and Optics, Saint Petersburg, Russia and Optique Nonlinéaire Théorique, Campus Plaine, CP 231, 1050 Bruxelles, Belgium.
authors.forename: E A
authors.initials: EA
authors.lastname: Viktorov
authors.affiliation: Optique Nonlinéaire Théorique, Campus Plaine, CP 231, 1050 Bruxelles, Belgium.
authors.forename: T
authors.initials: T
authors.lastname: Erneux