Publisher DOI: 10.1103/PhysRevLett.111.054104
Title: Hydrodynamic supercontinuum
Language: English
Authors: Chabchoub, Amin 
Hoffmann, Norbert  
Onorato, Miguel 
Genty, Goëry 
Dudley, John 
Akhmediev, Nail N. 
Issue Date: 2-Aug-2013
Publisher: American Physical Society
Source: Physical Review Letters 5 (111): Art.-Nr. 054104 (2013)
Journal or Series Name: Physical review letters 
Abstract (english): We report the experimental observation of multi-bound-soliton solutions of the nonlinear Schrödinger equation (NLS) in the context of hydrodynamic surface gravity waves. Higher-order N-soliton solutions with N=2, 3 are studied in detail and shown to be associated with self-focusing in the wave group dynamics and the generation of a steep localized carrier wave underneath the group envelope. We also show that for larger input soliton numbers, the wave group experiences irreversible spectral broadening, which we refer to as a hydrodynamic supercontinuum by analogy with optics. This process is shown to be associated with the fission of the initial multisoliton into individual fundamental solitons due to higher-order nonlinear perturbations to the NLS. Numerical simulations using an extended NLS model described by the modified nonlinear Schrödinger equation, show excellent agreement with experiment and highlight the universal role that higher-order nonlinear perturbations to the NLS play in supercontinuum generation. © 2013 American Physical Society.
URI: http://hdl.handle.net/11420/3069
ISSN: 1079-7114
Institute: Mechanik und Meerestechnik M-13 
Type: (wissenschaftlicher) Artikel
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