Giovanna Tissoni - Institut de Physique de Nice, 1361 Route des Lucioles, 06560 Valbonne (France) - Keywords: optics, dynamical systems, lasers, extreme events

Giovanna Tissoni - Institut de Physique de Nice, 1361 Route des Lucioles, 06560 Valbonne (France) - Keywords: optics, dynamical systems, lasers, extreme events

Contribution title: Extreme events in lasers

Extreme events are rare, unexpected and high impact events, in terms of intensity and/or destructive effects. They are the object of extensive research in many fields, such as oceanography, where they often manifest as rogue or freak waves, but are equally studied in economics, geology, climate and social sciences.
All these events may have different definitions and generating mechanisms. We focus on the case of optical rogue waves, which may present strong similarities with oceanic freak waves, due to the common mathematical framework where they can be described theoretically in the case of optical fibers, that is, the Nonlinear Schroedinger Equation. Nevertheless, to describe extreme events in nonlinear optical systems out of equilibrium, other theoretical models and dynamical mechanisms must be taken into account.
We will present some experimental and numerical results about extreme or abnormal events in semiconductor lasers, where a number of different generating mechanisms may be identified, such as spatiotemporal chaos, collisions between solitons or localized structures, and modulational instability.