Hannover 2013 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 43: Poster II

Q 43.52: Poster

Wednesday, March 20, 2013, 16:00–18:30, Empore Lichthof

Comparison of Nelder-Mead Simplex and Genetic Algorithm Methods for Optimization of Soliton Molecules — •Sonia Gholami, Philipp Rohrmann, Alexander Hause, and Fedor Mitschke — Universität Rostock, Institut für Physik, Universitätsplatz 3, 18051 Rostock

There are several suggestions to further increase the data rate in optical data transmission. The use of solitons, particularly robust short pulses, is generally considered to be restricted to binary coding. Recently soliton molecules, i.e. bound pairs and triplets of solitons have been observed in experiments [1]. Together with ordinary solitons they allow quaternary coding.

In order to find the best shape of these compounds we evaluate their changes of shape during propagation, in other words compare shapes at input and output of a dispersion-managed fiber, with the goal of minimizing the difference. Information about this difference is then fed back to the initial pulse compound shape, in order to obtain an automatic optimization. This involves an algorithm for which we compare a Nelder-Mead simplex method and a genetic algorithm. We numerically test the optimization on known cases and proceed to more complex ones. We present a comparison of the algorithms in terms of speed and quality of convergence to the best shape.

[1] P. Rohrmann et al., Scientific Reports 2, 866 (2012)