Results 181 to 190 of about 25,531 (223)

Multimode Laser Beam Scintillations in Non-Kolmogorov Turbulence

IEEE Journal on Selected Areas in Communications, 2015
Employing the Rytov solution, the scintillation index at the origin of the receiver plane is evaluated in non-Kolmogorov weak atmospheric turbulence when multimode laser incidence is used. The solution presented can be used when the multimode is composed of even modes. The novelty of this work lies in the theoretical combination of multimode laser beam
Yahya Baykal
exaly   +2 more sources

Anisotropic non-Kolmogorov turbulence phase screens with variable orientation

Applied Optics, 2015
We describe a modification to fast Fourier transform (FFT)-based, subharmonic, phase screen generation techniques that accounts for non-Kolmogorov and anisotropic turbulence. Our model also allows for the angle of anisotropy to vary in the plane orthogonal to the direction of propagation. In addition, turbulence strength in our model is specified via a
Jeremy P, Bos, Michael C, Roggemann, V S, Rao Gudimetla   +2 more
openaire   +3 more sources

Saturation of anisoplanatic error in Kolmogorov and non-Kolmogorov turbulence

Journal of the Optical Society of America A
This work explores the conditions resulting in the saturation of angular anisoplanatic error. When turbulence is modeled with a von Kármán outer scale or when the piston and aperture tilt are compensated the anisoplanatic error can saturate to less than one squared radian.
Bos, Jeremy
openaire   +3 more sources

Limits on wave optics simulations in non-Kolmogorov turbulence

Laser Communication and Propagation through the Atmosphere and Oceans VII, 2018
Wave Optics Simulations (WOS) are a valuable tool for exploring the effects of atmospheric turbulence on laser beam propagation and imaging. Obtaining accurate results from WOS requires careful selection of simulation parameters. Specifically, the inter-screen spacing, spatial sampling of source and receiver planes, and phase screen sampling are all ...
Stephen J. Grulke, Jeremy P. Bos
openaire   +2 more sources

Simulation of Spherical Wave Propagation in non-Kolmogorov turbulence

Propagation Through and Characterization of Atmospheric and Oceanic Phenomena, 2016
I present the results of an extensive simulation campaign examining the scintillation index of a spherical wave source propagating through uniform non-Kolmogorov and for Kolmogorov turbulence. Kolmogorov results are compared to extended Rytov theory.
Jeremy P. Bos, Bos, Jeremy P.
openaire   +2 more sources

Impact of Non-Kolmogorov Turbulence on Scintillometer

OSA Imaging and Applied Optics Congress 2021 (3D, COSI, DH, ISA, pcAOP), 2021
This study uses simulation to explore the effects of experimentally measured non-Kolmogorov turbulence on scintillometer readings. The results show that the useful- ness of the scintillometer readings depends on the turbulence characteristics.
Cristian Villatoro, Noah R. Van Zandt
openaire   +1 more source

Causes of non-Kolmogorov turbulence in the atmosphere

Applied Optics, 2016
In the present work, we briefly describe a model for atmospheric turbulence energy on the basis of experimental data obtained in Siberia. A series of new studies is considered and the results of our long-term experimental observations are summarized. The results of these studies form the basis for an explanation of some effects in interactions between ...
V P, Lukin, E V, Nosov, V V, Nosov, A V, Torgaev   +3 more
openaire   +2 more sources

Phase Screen Generation for Non-Kolmogorov Turbulence

Imaging and Applied Optics Congress 2022 (3D, AOA, COSI, ISA, pcAOP), 2022
Measurements of atmospheric turbulence frequently show non-Kolmogorov statistics. This paper explores two methods of numerical phase screen generation for such turbulence. The results show that both methods are accurate, but one runs 285 times faster.
Jason Salmanowitz, Noah R. Van Zandt
openaire   +1 more source

Optical propagation through non-Kolmogorov turbulence

Science China Information Sciences, 2012
In this paper, the effects of the generalized exponent, the height and the zenith angle on the log-amplitude variance in the weak fluctuation are investigated. The theoretical results indicate that for the downlink, the log-amplitude variance of the Kolmogorov model is always smaller than that of the three-layer model, while for the uplink, there is a ...
Hua Tang, BaoLin Ou
openaire   +1 more source

A General Mathematical Model For Non-Kolmogorov Turbulence

Imaging and Applied Optics, 2013
We present a power spectral density model of index of refraction, including power law relations within finite bands, and impulses denoting energy concentrations. We then discuss some resulting equations, without resorting to Kolmogorov assumptions.
Thomas C Farrell, Darryl I Sanchez, Jason Holzman, Patrick R Kelly   +3 more
openaire   +1 more source