Statistical properties of optical turbulence in a convective tank: experimental results

Authors
Citation
J. Zhang et Zy. Zeng, Statistical properties of optical turbulence in a convective tank: experimental results, J OPT A-P A, 3(4), 2001, pp. 236-241
Citations number
12
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS
ISSN journal
1464-4258 → ACNP
Volume
3
Issue
4
Year of publication
2001
Pages
236 - 241
Database
ISI
SICI code
1464-4258(200107)3:4<236:SPOOTI>2.0.ZU;2-C
Abstract
The Fried coherence length is quantitatively measured by means of two diffe rent methods in a convective turbulence tank for wavefront compensation exp eriments in adaptive optics. The spectra of angle-of-arrival (AA) fluctuati ons and their probability distribution are given. The fluctuation of the wa vefront phase follows a normal distribution. The chi (2) distribution appea rs to be a reasonable assumption for variance of AA fluctuations, and the s tatistical distribution P(r(o)) regarding the Fried coherent length ro of e xperimental results is shown. The spectrum of AA fluctuations in the x-dire ction, being the same as the spectrum in the y-direction, obviously indicat es that the turbulence in the tank is an isotropic feature. The experimenta l results for the Fried coherence length and temperature differences betwee n a heated plate and cooled plate correspond to the similarity relationship in fluid mechanics and thermodynamics experiments in a convective turbulen ce tank.