Results 141 to 150 of about 10,386,151 (162)

Temporal frequency spread of optical wave propagation through anisotropic non-Kolmogorov turbulence

Journal of Optics, 2015
In this paper, we derive new analytic expressions for the atmospheric-induced frequency spread of optical plane and spherical waves propagating in a horizontal path and experiencing anisotropic non-Kolmogorov turbulence. The anisotropic spectrum model is based on the assumption that circular symmetry is maintained in the orthogonal xy-plane throughout ...
Stephen Kotiang, Jaeho Choi
openaire   +1 more source

Propagation of ring Airy Gaussian beams with optical vortices through anisotropic non-Kolmogorov turbulence

Optics Communications, 2017
Abstract A new ring Airy Gaussian (RAiG) vortex beam generation method by coherent combination of Gaussian beam array has been proposed. To validate the feasibility of this method, the propagation properties of the RAiG vortex beam and the coherent combining beam in vacuum have been studied and analyzed.
Dong Zhi, Rumao Tao, Pu Zhou, Yanxing Ma, Wuming Wu, Xiaolin Wang, Lei Si   +6 more
openaire   +1 more source

Adaptive optics compensation of M-ary pulse position modulated communication systems in anisotropic non-Kolmogorov turbulent atmosphere

Optics Communications, 2021
Abstract Adaptive optics compensation effect on the performance of an optical wireless communication system (OWC) employing M-ary pulse position modulation (PPM) scheme in anisotropic non-Kolmogorov turbulent atmosphere is investigated. Avalanche photodetector (APD) is used at the receiver side and log-normal channel that models the weak turbulence ...
Yalçın Ata, Yahya Baykal, Muhsin Caner Gökçe   +2 more
openaire   +2 more sources

Average polarizability of quantization Bessel-Gaussian Schell-model beams in anisotropic non-Kolmogorov turbulence

Fourth Seminar on Novel Optoelectronic Detection Technology and Application, 2018
Utilizing the quantized Huygens-Fresnel principle, we study the effects of anisotropic non-Kolmogorov turbulence on the average polarizability of quantization Bessel-Gaussian Schell-model (BGSM) photon beams. We find that the average polarizability has a weak dependence on the outer scale.
Yixin Zhang, Ye Li
openaire   +1 more source

A detailed comparison of non-Kolmogorov and anisotropic optical turbulence theories using wave optics simulations

Laser Communication and Propagation through the Atmosphere and Oceans VII, 2018
In recent years, theoretical studies of optical propagation through turbulence exhibiting statistical anisotropy and a non- Kolmogorov energy spectrum, with a power law unequal to 11/3rds, have appeared regularly in the literature. In this study, we use split-step propagation wave optics simulations, together with FFT-based subharmonic phase screens to
Christopher C. Davis, Chensheng Wu, Daniel A. Paulson   +2 more
openaire   +1 more source

BER performance of M-ary pulse position modulated communication systems in anisotropic non-Kolmogorov turbulent atmosphere

Waves in Random and Complex Media, 2020
We investigated the effect of anisotropic non-Kolmogorov atmospheric turbulence on the performance of the optical wireless systems when M-ary Pulse Position Modulation (PPM) is applied to a Gaussia...
Yalçın Ata, Yahya Baykal, Muhsin Caner Gökçe   +2 more
openaire   +2 more sources

Beam spread and wander of Gaussian beam through anisotropic non-Kolmogorov atmospheric turbulence for optical wireless communication

2017 IEEE International Conference on Communications Workshops (ICC Workshops), 2017
In the horizontal atmospheric turbulent channel of optical wireless communication (OWC), anisotropy has been proved to be one of essential properties. This paper investigates the long term beam spread and the beam wander of Gaussian beam based on the generalized anisotropic non-Kolmogorov power spectrum, where all the influence of the anisotropy of ...
Zhan Gao, Jiankun Zhang, Anhong Dang
openaire   +2 more sources

Analysis of temporal power spectra for optical waves propagating through weak anisotropic non-Kolmogorov turbulence

Journal of the Optical Society of America A, 2015
Analytic expressions for the temporal power spectra of irradiance fluctuations and angle of arrival (AOA) fluctuations are derived for optical waves propagating through weak anisotropic non-Kolmogorov atmospheric turbulence. In the derivation, the anisotropic non-Kolmogorov spectrum is adopted, which adopts the assumption of circular symmetry in the ...
openaire   +2 more sources

Effect of the Zenith Angle on Optical Wave Propagation in Anisotropic Non-Kolmogorov Atmospheric Turbulence: A New Experiment-Based Model

IEEE Transactions on Antennas and Propagation, 2020
The spectral properties of the structural function of atmospheric turbulence can differ in the vertical and horizontal directions. Taking into account the influence of this anisotropy on the signal along the direction of propagation at an angle ${\gamma }$ , to the horizon, can be useful in modeling and interpreting the results of measurements ...
Elad Dakar, Ephim Golbraikh, Natan S. Kopeika, Arkadi Zilberman   +3 more
openaire   +1 more source

Backscatter amplification effect in a non-Kolmogorov anisotropic turbulent medium

Journal of Quantitative Spectroscopy and Radiative Transfer, 2022
V.A. Banakh, A.V. Falits
openaire   +1 more source