Aragoneses A, Carpi L, Tarasov N, Churkin D V, Torrent M C, Masoller C, Turitsyn S K
Departament de Física, Universitat Politècnica de Catalunya, 08222 Terrassa, Spain.
Duke University, Physics Department, Box 90305, Durham, North Carolina 27708, USA.
Phys Rev Lett. 2016 Jan 22;116(3):033902. doi: 10.1103/PhysRevLett.116.033902.
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.
我们使用时间序列分析的先进统计工具来表征光纤激光器中向光波湍流转变的动态复杂性。将序数分析和水平可见性图应用于实验测量的激光输出强度，揭示了从层流到湍流激光状态转变期间存在时间相关性。这两种方法都揭示了具有明确时间尺度的相干结构，并且在激光脉冲的时间及其峰值强度方面都存在强相关性。我们的方法具有通用性，可用于其他经历类似转变（涉及产生极端波动）的复杂系统。
