Influence of different refractive index spectrums on scintillation and phase fluctuation power spectrum of light wave propagation in atmosphere

yuan ke’e; zhu wenyue; rao ruizhong

Volume 22 Issue 07

Jun. 2010

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yuan ke’e, zhu wenyue, rao ruizhong. Influence of different refractive index spectrums on scintillation and phase fluctuation power spectrum of light wave propagation in atmosphere[J]. High Power Laser and Particle Beams, 2010, 22.

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Influence of different refractive index spectrums on scintillation and phase fluctuation power spectrum of light wave propagation in atmosphere

1.
Center for Atmosperic Optics,Anhui Institute of Optics and Fine Mechanics,Key Laboratory of Atmosphere Composition and Optical Radiation,Chinese Academy of Sciences,P.O.Box 1125,Hefei 230031,China

Publish Date: 2010-06-30

Abstract

Abstract

Based on Taylor’s frozen turbulence hypothesis, analytical expressions of scintillation and phase fluctuation power spectrum of the light wave propagation in atmosphere with different refractive index spectrum of turbulence were deduced. The influence of turbulent refractive index scaling exponent, inner scale together with outer scale on light wave power spectrum was discussed. Analytic results were summarized as follows. Firstly, with the increase of turbulent refractive index scaling exponent, the low-frequency spectrum of atmospheric scintillation isn’t only a constant, the high-frequency spectrum obeys the power law with an increasing exponent, and the slope of phase fluctuation power spectrum is increasing in the whole frequency range. Secondly, the bigger the turbulent inner scale
- atmospheric turbulence,
- light wave fluctuation power spectrum,
- refractive index scaling exponent,
- inner scale,
- outer scale

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