Multiscale permutation entropy analysis of laser beam wandering in isotropic turbulence
We have experimentally quantified the temporal structural diversity from the coordinate fluctuations of a laser beam propagating through isotropic optical turbulence. The main focus here is on the characterization of the long-range correlations in the wandering of a thin Gaussian laser beam over a s...
Guardado en:
| Autores principales: | , , , , |
|---|---|
| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2017
|
| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/125552 |
| Aporte de: |
| id |
I19-R120-10915-125552 |
|---|---|
| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Exactas Física Ingeniería Multiple time scale dynamics Stochastic dynamical systems Entropic sampling methods Time series analysis |
| spellingShingle |
Ciencias Exactas Física Ingeniería Multiple time scale dynamics Stochastic dynamical systems Entropic sampling methods Time series analysis Olivares, Felipe Zunino, Luciano José Gulich, Damián Pérez, Darío G. Rosso, Osvaldo A. Multiscale permutation entropy analysis of laser beam wandering in isotropic turbulence |
| topic_facet |
Ciencias Exactas Física Ingeniería Multiple time scale dynamics Stochastic dynamical systems Entropic sampling methods Time series analysis |
| description |
We have experimentally quantified the temporal structural diversity from the coordinate fluctuations of a laser beam propagating through isotropic optical turbulence. The main focus here is on the characterization of the long-range correlations in the wandering of a thin Gaussian laser beam over a screen after propagating through a turbulent medium. To fulfill this goal, a laboratory-controlled experiment was conducted in which coordinate fluctuations of the laser beam were recorded at a sufficiently high sampling rate for a wide range of turbulent conditions. Horizontal and vertical displacements of the laser beam centroid were subsequently analyzed by implementing the symbolic technique based on ordinal patterns to estimate the well-known permutation entropy. We show that the permutation entropy estimations at multiple time scales evidence an interplay between different dynamical behaviors. More specifically, a crossover between two different scaling regimes is observed. We confirm a transition from an integrated stochastic process contaminated with electronic noise to a fractional Brownian motion with a Hurst exponent H=5/6 as the sampling time increases. Besides, we are able to quantify, from the estimated entropy, the amount of electronic noise as a function of the turbulence strength. We have also demonstrated that these experimental observations are in very good agreement with numerical simulations of noisy fractional Brownian motions with a well-defined crossover between two different scaling regimes. |
| format |
Articulo Articulo |
| author |
Olivares, Felipe Zunino, Luciano José Gulich, Damián Pérez, Darío G. Rosso, Osvaldo A. |
| author_facet |
Olivares, Felipe Zunino, Luciano José Gulich, Damián Pérez, Darío G. Rosso, Osvaldo A. |
| author_sort |
Olivares, Felipe |
| title |
Multiscale permutation entropy analysis of laser beam wandering in isotropic turbulence |
| title_short |
Multiscale permutation entropy analysis of laser beam wandering in isotropic turbulence |
| title_full |
Multiscale permutation entropy analysis of laser beam wandering in isotropic turbulence |
| title_fullStr |
Multiscale permutation entropy analysis of laser beam wandering in isotropic turbulence |
| title_full_unstemmed |
Multiscale permutation entropy analysis of laser beam wandering in isotropic turbulence |
| title_sort |
multiscale permutation entropy analysis of laser beam wandering in isotropic turbulence |
| publishDate |
2017 |
| url |
http://sedici.unlp.edu.ar/handle/10915/125552 |
| work_keys_str_mv |
AT olivaresfelipe multiscalepermutationentropyanalysisoflaserbeamwanderinginisotropicturbulence AT zuninolucianojose multiscalepermutationentropyanalysisoflaserbeamwanderinginisotropicturbulence AT gulichdamian multiscalepermutationentropyanalysisoflaserbeamwanderinginisotropicturbulence AT perezdariog multiscalepermutationentropyanalysisoflaserbeamwanderinginisotropicturbulence AT rossoosvaldoa multiscalepermutationentropyanalysisoflaserbeamwanderinginisotropicturbulence |
| bdutipo_str |
Repositorios |
| _version_ |
1764820451849142273 |