To the Diagnostics of Optically Dense Media via Phase Screen Model

The goal of the work is to study the characteristics detected of a fluorescence signal during the passage of a Gaussian laser beam through an optically dense phase screen. Numerical experiments are based on the matrix theory of a partially coherent beam and the property of a random phase screen with a variable thickness. The main characteristics of the detected signal are the mutual coherent function of the partially coherent beams, the scintillation index, the relative radius of the detected beam, etc., which are calculated under the condition of weak fluctuations of the phase screen. The practical significance of the work is about improving the quality of the characteristics of the detected signal at diagnosing an optically dense medium, such as aquatic environments with fluorescent impurities (various organic substances, oil, etc.).