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DY: Fachverband Dynamik und Statistische Physik
DY 20: Nonlinear Dynamics 1 - organized by Azam Gholami (Göttingen)
DY 20.3: Vortrag
Dienstag, 23. März 2021, 09:40–10:00, DYc
Non-local effects in external cavity passively mode-locked lasers — •Jan Hausen1, Christian Schelte2, Julien Javaloyes2, Svetlana V. Gurevich2,3, and Kathy Lüdge1 — 1TU Berlin, Hardenbergstrasse 36, 10623 Berlin — 2Universitat de les Illes Balears & Institute of Applied Computing and Community Code, Cra. de Valldemossa, km 7.5. Palma (Illes Balears) — 3WWU Münster, Wilhelm-Klemm-Strasse 9, 48149 Münster
Asymetrical cavity geometries can improve the performances of passively mode-locked vertical external-cavity surface-emitting lasers and give rise to non-equidistant pulse patterns. We show that these geometries create non-local effects; by analysing a previously developed delay differential equation model, we derive rigorously a master partial differential equation from the pulse evolution that contains such non-local terms. We extend our analysis to the dynamics of non-equidistant pulse patterns in the long cavity regime, in which the pulses become temporal localized structures. We study the influence of the non-locality stemming from the asymmetric position of the elements in the cavity on the pulse distance within these patterns and deduce an analytic framework. By performing a Floquet-analysis, we find that with increasing cavity round-trip times there is a continuous transition from bound pulse patterns to pulses which are globally bound by the non-local effects, but locally independent, similar to catenane molecules.