Regensburg 2016 – wissenschaftliches Programm
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DF: Fachverband Dielektrische Festkörper
DF 3: Optical and nonlinear optical properties, photonic
DF 3.7: Vortrag
Montag, 7. März 2016, 11:50–12:10, H26
Quasi-solitons and rogue waves generation in optical fibers — •Antonino Savojardo1, Rudolf A. Römer1, and Marc Eberhard2 — 1Department of Physics and Centre for Scientific Computing, The University of Warwick, Coventry CV4 7AL, UK — 2School of Engineering and Applied Science, Aston University, Aston Triangle, Birmingham B4 7ET, UK
Optical rogue waves are sharp, rare and extremely high power pulses. Experimental and numerical data suggest that these giant waves are due to at least two mechanisms of amplification, modulation instability (that allows the creation of quasi-solitons) and multiple inelastic quasi-soliton collisions. Using a generalized nonlinear Schrödinger equation we calculate the probability distribution function (PDF) for the intensity inside a fiber. We investigate pair-wise quasi-soliton collisions and propose a formula for the energy transfer. This allows us to implement an effective cascade model. The PDFs calculated using the two models are very similar. Our results suggest that once localized pulses are formed because of modulation instability an important contribution to rogue waves generation is quasi-soliton inelastic scattering.