Investigation of the influence of the instability of the operation of the transmitting laser channel pointing errors, atmospheric turbulence on the characteristics of its radiation in the far zone

Based on the methods of the theory of propagation of electromagnetic waves in the optical range in a turbulent atmosphere, mathematical statistics, and functional transformation of random variables, an estimate is made of the distribution density of the intensity of fluctuating radiation created by a laser transmitting channel in the far zone. With regard to the threshold radiation intensities, which take into account the different modes of generation of the transmitting laser channel, the probability of reaching a given level of radiation intensity in the region of the optoelectronic means is determined. Using this efficiency indicator, a study was made of the influence of the instability of the operation of the transmitting laser channel, pointing errors, and atmospheric turbulence on the characteristics of its radiation in the aperture plane of the forming optics of the optoelectronic means. It is shown that the passage of laser radiation through a randomly inhomogeneous medium is accompanied by errors in pointing the laser beam and its expansion, which has a significant effect on achieving a given level of radiation intensity in the region of the optoelectronic means. An increase in the efficiency index is possible by choosing the optimal angle of divergence of the laser radiation of the transmitting channel, which takes into account fluctuations in the dielectric constant and refractive index of the atmosphere.