Journal
NATURE PHOTONICS
Volume 12, Issue 5, Pages 303-+Publisher
NATURE RESEARCH
DOI: 10.1038/s41566-018-0136-1
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Funding
- Agence Nationale de la Recherche through the High Energy All Fiber Systems (HEAFISY) project
- Labex Centre Europeen pour les Mathematiques, la Physique et leurs Interactions (CEMPI) through the 'Programme Investissements d'Avenir'
- Equipex Fibres optiques pour les hauts flux (FLUX) through the 'Programme Investissements d'Avenir'
- Ministry of Higher Education and Research
- Hauts de France council
- European Regional Development Fund (ERDF) through the Contrat de Projets Etat-Region (CPER Photonics for Society, P4S)
- FEDER through the HEAFISY project
- Agence Nationale de la Recherche through the Nonlinear dynamics of Abnormal Wave Events (NoAWE) project
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In optical fibres, weak modulations can grow at the expense of a strong pump to form a triangular comb of sideband pairs, until the process is reversed. Repeated cycles of such conversion and back-conversion constitute a manifestation of the universal nonlinear phenomenon known as Fermi-Pasta-Ulam recurrence. However, it remains a major challenge to observe the coexistence of different types of recurrences owing to the spontaneous symmetry-breaking nature of such a phenomenon. Here, we implement a novel non-destructive technique that allows the evolution in amplitude and phase of frequency modes to be reconstructed via post-processing of the fibre backscattered light. We clearly observe how control of the input modulation seed results in different recursive behaviours emerging from the phase-space structure dictated by the spontaneously broken symmetry. The proposed technique is an important tool to characterize other mixing processes and new regimes of rogue-wave formation and wave turbulence in fibre optics.
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