Berlin 2018 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 70: Poster: Flows, Patterns, Delay, Reaction Diffusion

DY 70.22: Poster

Thursday, March 15, 2018, 15:30–18:00, Poster A

Delayed feedback control of self-mobile cavity solitons in a wide-aperture laser with a saturable absorber — •Tobias Schemmelmann¹, Felix Tabbert¹, Alexander Pimenov², Andrei Vladimirov², and Svetlana Gurevich^1,3 — ¹Institute for Theoretical Physics, University of Münster, Wilhelm-Klemm-Str. 9, D-48149, Münster, Germany — ²Weierstrass Institute for Applied Analysis and Stochastics, Mohrenstrasse 39, D-10117 Berlin, Germany — ³Center for Nonlinear Science (CeNoS), University of Münster, Corrensstr. 2, 48149 Münster, Germany

We investigate the spatiotemporal dynamics of cavity solitons in a broad area vertical-cavity surface-emitting laser (VCSEL) under the influence of time-delayed optical feedback using a combination of analytical, numerical and path continuation methods. In particular, two types of moving cavity solitons are found, corresponding to slow and fast motion of the localised structure. We show that time-delayed feedback influences the dynamics of both stationary and moving cavity solitons, leading to a complex dynamical behaviour. The delay-induced instabilities range from simple drifting to wiggling dynamics and a combination of both. In addition, our analysis reveals that it is possible to use time-delayed feedback to stabilise intrinsically drifting cavity solitons.