Results 11 to 20 of about 1,092 (161)

Field correlation of flat-topped beams in anisotropic non-Kolmogorov turbulent atmosphere

open access: yesJournal of Modern Optics, 2018
Field correlation of flat-topped beams in anisotropic non-Kolmogorov turbulent atmosphere is formulated and evaluated. Larger anisotropic factor causes higher field correlations.
Yalçın Ata, Yahya Baykal
openaire   +3 more sources

Average channel capacity in anisotropic atmospheric non-Kolmogorov turbulent medium

open access: yesOptics Communications, 2019
Abstract The average channel capacity of a free space optical (FSO) communication system running an intensity modulated Gaussian beam is examined in anisotropic non-Kolmogorov atmospheric weak turbulence based on Rytov variance. Results are obtained by employing the log-normal distribution of irradiance fluctuations corresponding to weak turbulence ...
Ata, Yalcin   +2 more
openaire   +3 more sources

Simulating non-Kolmogorov turbulence phase screens based on equivalent structure constant and its influence on simulations of beam propagation

open access: yesResults in Physics, 2017
Gaussian distribution is used to describe the power law along the propagation path and phase screen of the non-Kolmogorov turbulence is proposed based on the equivalent refractive-index structure constants.
Ming Chen   +5 more
doaj   +2 more sources

Wave Structure Function and Long-Exposure MTF for Gaussian-Beam Waves Propagating in Anisotropic Maritime Atmospheric Turbulence

open access: yesApplied Sciences, 2020
The expressions of wave structure function (WSF) and long-exposure modulation transfer function (MTF) for laser beam propagation through non-Kolmogorov turbulence were derived in our previous work. In this paper, based on anisotropic maritime atmospheric
Bing Guan   +3 more
doaj   +2 more sources

On channel capacity of FSO communication systems in anisotropic non-Kolmogorov strong turbulent atmosphere

open access: yesJournal of the Optical Society of America A, 2019
Average channel capacity of free space optical (FSO) communication systems using a Gaussian beam with the intensity modulation and direct detection technique is investigated in anisotropic non-Kolmogorov strong turbulent atmosphere. The channel model is selected as gamma-gamma distribution, which is valid for strong turbulence.
Yalçın Ata, Ata, Yalcin
core   +5 more sources

Understanding Atrial Fibrillation Complexity Through the Lens of Turbulence Dynamics: Implications for Treatment Strategies. [PDF]

open access: yesJ Cardiovasc Electrophysiol
ABSTRACT Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia encountered in clinical practice. Its incidence increases significantly with age and has become a major global public health issue. Although research into the mechanisms of AF has spanned over a century‐ranging from the reentry theory to the rotor hypothesis‐none of these
Chu X, Jiang X, Qiao Q, Wang X, Ye H.
europepmc   +2 more sources

Non-Classic Atmospheric Optical Turbulence: Review

open access: yesApplied Sciences, 2021
Theoretical models and results of experimental campaigns relating to non-classic regimes occurring in atmospheric optical turbulence are overviewed.
Olga Korotkova, Italo Toselli
doaj   +1 more source

Performance of HQAM/XQAM Laser Communication System in Anisotropic Non-Kolmogorov Ground–HAP–Satellite Uplink

open access: yesPhotonics, 2023
Satellite laser communication can achieve high-speed, high-precision, and high-security broadband communication without being constrained by the electromagnetic spectrum, which has attracted attention.
Xuewen Jiang, Yi Wang, Wangyue Lu
doaj   +1 more source

Effects of Background Turbulence on the Relaxation of Ion Temperature Anisotropy Firehose Instability in Space Plasmas

open access: yesUniverse, 2022
Turbulence in space plasmas usually exhibits an energy cascade in which large-scale magnetic fluctuations are dominated by non-linear MHD wave–wave interactions following a Kolmogorov-like power-law spectrum.
Roberto E. Navarro, Pablo S. Moya
doaj   +1 more source

Free space optical system performance for a Gaussian beam propagating through non Kolmogorov weak turbulence [PDF]

open access: yes, 2009
Atmospheric turbulence has been described for many years by Kolmogorov's power spectral density model because of its simplicity. Unfortunately several experiments have been reported recently that show Kolmogorov theory is sometimes incomplete to describe
LARRY C. ANDREWS   +6 more
core   +1 more source

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