Berlin 2018 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 15: Nonlinear Dynamics, Synchronization, Chaos I
DY 15.8: Talk
Monday, March 12, 2018, 17:15–17:30, BH-N 128
Generalized synchronization of a population of semiconductor lasers in some-to-all coupling configuration — •Axel Dolcemascolo1, Francesco Marino2, Romain Veltz3, and Stéphane Barland1 — 1Université de Nice, CNRS, Institut Non Linéaire de Nice, Sophia Antipolis, France — 2Dipartimento di Fisica, Università di Firenze, INFN, Sezione di Firenze, Italy — 3Inria Sophia Antipolis, MathNeuro Team, Sophia Antipolis, France
Synchronization between different oscillators occurs in many natural and technological systems, from cardiac pacemaker cells to electronic components or coupled lasers. Here we explore a system of around 500 lasers arranged in an array, which are coupled together with an opto-electronic coupling, where the intensity of the emitted light (after continuous component removal and a saturable nonlinear function) controls the current used to drive collectively all the lasers. The coupling is of some-to-all type, where an arbitrary set of the devices is coupled with the whole population.
The particular case of just one coupled laser has already been studied in *Chaotic spiking ...* by Kais Al-Naimee et al., New J. Phys. 11 (2009), where it has been shown that one single laser can produce a sequence of slow chaotic spiking as a result of an incomplete homoclinic scenario to a saddle-focus. Here we study experimentally the different types of dynamics that emerge when changing the set of feedback lasers while also keeping constant the feedback strength, and the emergence of chaos and synchronization when changing control parameters such as the coupling strength and the operating point of the whole array.