title: Unveiling Temporal Correlations Characteristic of a Phase Transition in the Output Intensity of a Fiber Laser.
abstract: We use advanced statistical tools of time-series analysis to characterize the dynamical complexity of the transition to optical wave turbulence in a fiber laser. Ordinal analysis and the horizontal visibility graph applied to the experimentally measured laser output intensity reveal the presence of temporal correlations during the transition from the laminar to the turbulent lasing regimes. Both methods unveil coherent structures with well-defined time scales and strong correlations both, in the timing of the laser pulses and in their peak intensities. Our approach is generic and may be used in other complex systems that undergo similar transitions involving the generation of extreme fluctuations.
authors: Departament de Física, Universitat Politècnica de Catalunya, 08222 Terrassa, Spain.|Duke University, Physics Department, Box 90305, Durham, North Carolina 27708, USA.
authors: A
authors: A
authors: Aragoneses
authors: Departament de Física, Universitat Politècnica de Catalunya, 08222 Terrassa, Spain.
authors: L
authors: L
authors: Carpi
authors: Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, United Kingdom.|Institute for Computational Technologies, SB RAS, Novosibirsk 630090, Russia.
authors: N
authors: N
authors: Tarasov
authors: Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, United Kingdom.|Institute of Automation and Electrometry SB RAS, Novosibirsk 630090, Russia.|Novosibirsk State University, Novosibirsk 630090, Russia.
authors: D V
authors: DV
authors: Churkin
authors: Departament de Física, Universitat Politècnica de Catalunya, 08222 Terrassa, Spain.
authors: M C
authors: MC
authors: Torrent
authors: Departament de Física, Universitat Politècnica de Catalunya, 08222 Terrassa, Spain.
authors: C
authors: C
authors: Masoller
authors: Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, United Kingdom.|Novosibirsk State University, Novosibirsk 630090, Russia.
authors: S K
authors: SK
authors: Turitsyn