On the modulation instability development in optical fiber systems

Details On the modulation instability development in optical fiber systems On the modulation instability development in optical fiber systems

2010-04-19

arxiv.org/abs/1004.3209v1

Nonlinear Sciences

Pattern Formation and Solitons

9 pages, 54 figures

Scientific paper

Extensive numerical simulations were performed to investigate all stages of modulation instability development from the initial pulse of pico-second duration in photonic crystal fiber: quasi-solitons and dispersive waves formation, their interaction stage and the further propagation. Comparison between 4 different NLS-like systems was made: the classical NLS equation, NLS system plus higher dispersion terms, NLS plus higher dispersion and self-steepening and also fully generalized NLS equation with Raman scattering taken into account. For the latter case a mechanism of energy transfer from smaller quasi-solitons to the bigger ones is proposed to explain the dramatical increase of rogue waves appearance frequency in comparison to the systems when the Raman scattering is not taken into account.

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