Propagation of Radial Partially Coherent Beams in Anisotropic Non-Kolmogorov Turbulence

Minghao, 王铭淏 Wang; Xiuhua, 元秀华 Yuan; Jun, 黎军 Li; Xiaoxin, 周小歆 Zhou; Qi, 李奇 Li; Zeyu, 周泽宇 Zhou

doi:10.3788/aos201838.0306003

光学学报

2018

DOI: 10.3788/aos201838.0306003

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Propagation of Radial Partially Coherent Beams in Anisotropic Non-Kolmogorov Turbulence

王铭淏 Wang Minghao¹,

元秀华 Yuan Xiuhua²,

黎军 Li Jun³

et al.

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Propagation properties of partially coherent quasi-rectangular beams in a turbulent atmosphere

Zhou

et al. 2021

OSA Continuum

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A class of random, wide-sense stationary optical beams with uniform correlations, named the partially coherent quasi-rectangular beam, is introduced theoretically. Based on the extended Huygens-Fresnel principle, the analytical expressions for the cross-spectral density (CSD), effective radius of curvature, and beam wander of the beam in the non-Kolmogorov turbulence are derived. It is found that the position of maximum intensity of the partially coherent quasi-rectangular beams shifts farther from the axis at intermediate distance, the shift in the turbulence is depressed compared to that in free space. As the effective radius of curvature decreases from infinity to a constant with the increase of the coherence length, it always takes a higher value than that in free-space propagation when the other parameters are fixed. In addition, the beam wander can be reduced by picking a relative small initial beam width, short coherence length, or long wavelength. These results are of importance for optical systems operating through long-range turbulent channels in which a beam must have a range-dependent tilt, e.g. on travelling around an obstacle on the axis.

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Propagation properties of partially coherent quasi-rectangular beams in a turbulent atmosphere

Zhou

et al. 2021

OSA Continuum

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Beam Wander of the Multi-Gaussian Schell-Model Beam in Anisotropic Turbulence

Shu¹,

Xu²,

Zhou³

et al. 2019

PIER M

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Based on the extended Huygens-Fresnel principle, the expressions of degree of coherence, ellipticity, and beam wander of multi-Gaussian Schell-model beam through the anisotropic turbulence are derived. Their statistical properties in anisotropic turbulence are illustrated numerically. The results show that the beam width and beam wander of multi-Gaussian Schell-model beam decrease with the increase of the mode order or the decrease of the turbulence structure parameter and initial coherence and that the degree of coherence of multi-Gaussian Schell-model beam decreases with the increase of the turbulence structure parameter or the decrease of the mode order. Furthermore, the beam wander of multi-Gaussian Schell-model beam is smaller than that of Gaussian Schell-model beam under the same conditions.

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Propagation of Radial Partially Coherent Beams in Anisotropic Non-Kolmogorov Turbulence

Cited by 2 publications

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Propagation properties of partially coherent quasi-rectangular beams in a turbulent atmosphere

Propagation properties of partially coherent quasi-rectangular beams in a turbulent atmosphere

Beam Wander of the Multi-Gaussian Schell-Model Beam in Anisotropic Turbulence

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