2020
Volume 20, Number 3, pp. 104-110
Estimation of scintillation index for a Gaussian laser beam propagating through a random phase screen
N.Kh. Gomidze,1 J.J. Shainidze,1 I.N. Jabnidze,1 K.A. Makharadze,1 M.R. Khajishvili,1 L.G. Kalandadze,1 O. Nakashidze1 and E.N. Mshkhaladze2
1 Shota Rustaveli State University, Batumi, Georgia
2 Batumi Maritime Academy, Georgia
The goal of the present work is to determine how changes of the characteristics of high frequency optical signals are regulated, using both quantitative and qualitative approaches. The basis is changes in the statistical parameters of turbulent media assessed via the random phase screen model. Statistical moments of laser radiation interacting with a random phase screen are analysed by numerical modeling and compared with experimental results. Both a random inhomogeneous atmosphere with weak turbulence and an optically dense turbulent medium are analysed. The random phase screen model is discussed and the distribution of the statistical moments of the scattered laser radiation is found. The dependence of the effective size of the laser beam and the scintillation index on the correlation radius of the phase screen in the plane of the detector for a random phase screen is estimated.
Keywords: optically dense turbulent media, randomly inhomogeneous atmosphere, second-order coherent function, statistical moments, weak turbulence