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DY: Fachverband Dynamik und Statistische Physik

DY 12: Delay and Feedback Dynamics

DY 12.5: Vortrag

Montag, 20. März 2017, 16:30–16:45, ZEU 147

Quantum-dot lasers with optical feedback: Autocorrelation function and rescaling properties — •David Schicke, André Röhm, Benjamin Lingnau, and Kathy Lüdge — Institut für Theoretische Physik, Sekr. EW 7-1, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany

The dynamics of a semiconductor laser with feedback can be characterised by the autocorrelation function of the electric field. Experiments using quantum well lasers have shown that the qualitative dynamics do not change for different delay times and pump currents. By rescaling the system variables one can even achieve quantitative agreement [1]. Whether the same rescaling properties hold in quantum dot lasers with feedback is an open problem. We present numerical simulations for a quantum dot laser model as described in [2], extended by an extra delay term for the electric field describing feedback. The laser exhibits mostly stable behaviour for low delay times, i.e. several hundred picoseconds. Accordingly we concentrate on intermediate to long delay times (tens of nanoseconds), where chaotic dynamics can be observed and compared for different operating parameters.

Porte, X., Soriano, M. C., Fischer, I., Similarity properties in the dynamics of delayed-feedback semiconductor lasers, Phys. Rev.  A 89, 023822 (2014).

[2] Lingnau, B., Chow, W. W., Lüdge, K., Amplitude-phase coupling and chirp in quantum-dot lasers: influence of charge carrier scattering dynamics, Opt. Express 22, 4867-4879 (2014).