Abstract
This paper investigates the aperture-averaged irradiance scintillation index of a Gaussian beam propagating through a horizontal path in weak non-Kolmogorov turbulence. Mathematical expressions are obtained based on the generalized modified atmospheric spectrum, which includes the spectral power law value of non-Kolmogorov turbulence, the finite inner and outer scales of turbulence, and other optical parameters of the Gaussian beam. The numerical results are conducted to analyze the influences of optical parameters on the aperture-averaged irradiance scintillation index for different Gaussian beams. This paper also examines the effects of the irradiance scintillation on the performance of the point-to-point optical wireless communication system with intensity modulation/direct detection scheme.
Highlights
Optical wireless communication technology has drawn much attention for its significant technological challenges and prospective applications
The aperture-averaged irradiance scintillation index of a Gaussian beam propagating through weak atmospheric turbulence in the absence of beam wander takes the form [8]
This section conducts numerical simulations to analyze the influences of α, l0, L0, W0, and λ on the aperture-averaged irradiance scintillation index σI2(DG) of different Gaussian beams
Summary
Optical wireless communication technology has drawn much attention for its significant technological challenges and prospective applications. Among the non-Kolmogorov models, the generalized modified atmospheric spectrum considers the finite inner and outer scales of turbulence, and features the small rise at a high wave number, which is clearly seen in temperature data recorded by sensors [17, 18]. These properties make the generalized modified atmospheric spectrum useful in the investigation of the irradiance scintillation index along the radial and longitudinal propagation [10, 11, 13].
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