Ms. Yuan Chen Profile

Yuan Chen

at Xidian Univ

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Proceedings Article | 21 August 2013 Paper

BER of Gaussian beam propagation in non-Kolmogorov turbulent atmosphere on slant path

Rui-ke Yang, Yuan Chen, Jie Hou, Hui Chen

Proceedings Volume 8906, 890625 (2013) https://doi.org/10.1117/12.2034857

KEYWORDS: Turbulence, Scintillation, Atmospheric propagation, Gaussian beams, Beam propagation method, Signal to noise ratio, Wave propagation, Spherical lenses, Atmospheric turbulence, Laser beam propagation

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The propagation characteristic of a Gaussian beam through turbulent atmosphere have been studied in the past several years. The main advantage of Gaussian beam wave model is that the infinite plant wave and a spherical wave are being included. Non-Kolmogorov spectrum can describe generalized turbulent atmosphere environment. The propagation properties of Gaussian beam propagating through the turbulent atmosphere described by non-Kolmogorov spectrum are studied on slant path. The scintillation index is analyzed with the Gaussian beam of different turbulent strength, zenith angle, φ , and the spectral exponent, α, of non-Kolmogorov, respectively. The effect of the turbulent structure constant on the ground on sicntillation is notable. The scintillation index reduces remarkably with zenith angle and structure parameter decrease. At weak turbulenc, scintillation index increases as spectral exponent decreases. The bit error rate (BER) of a Gaussian beam propagating in non-Kolmogorov atmospheric turbulence channel is estimated on Earth-space slant path. By comparing the effect of the spectral power with the structure constant on BER at moderate and strong turbulence, the effect of the spectral power change on BER is small. With turbulence weakening , at the order of 10^-15m^-2/3 , the relative effect of the spectral power on BER is gradually increase. Hence, at the small structure constant on the ground, or weak turbulence, the effect of the turbulent spectral power on BER is required to take into account.

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