Results 11 to 20 of about 10,386,151 (162)

Anisotropic non-Kolmogorov turbulence effect on transmittance of multi-Gaussian beam

open access: yesWaves in Random and Complex Media, 2018
The effect of anisotropic non-Kolmogorov turbulent atmosphere on multi-Gaussian beam is investigated and the results are presented against different beam and medium parameters.
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   +4 more sources

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

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

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   +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

Quantifying scaling in the velocity field of the anisotropic turbulent solar wind [PDF]

open access: yes, 2007
Solar wind turbulence is dominated by Alfvénic fluctuations with power spectral exponents that somewhat surprisingly evolve toward the Kolmogorov value of −5/3, that of hydrodynamic turbulence.
Hnat, B., Chapman, Sandra C.
core   +1 more source

Critical balance in magnetohydrodynamic, rotating and stratified turbulence : towards a universal scaling conjecture [PDF]

open access: yes, 2009
It is proposed that critical balance - a scale-by-scale balance between the linear propagation and nonlinear interaction time scales - can be used as a universal scaling conjecture for determining the spectra of strong turbulence in anisotropic wave ...
Nazarenko, Sergey   +5 more
core   +1 more source

A weak turbulence theory for incompressible magnetohydrodynamics [PDF]

open access: yes, 2000
We derive a weak turbulence formalism for incompressible magnetohydrodynamics. Three-wave interactions lead to a system of kinetic equations for the spectral densities of energy and helicity. The kinetic equations conserve energy in all wavevector planes
S. V. Nazarenko   +7 more
core   +1 more source

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