In problems of optical location, communication, and energy transmission one frequently runs up against the problem of transporting radiant energy in the form of a light beam to an object located in a random inhomogeneous medium. Here, as a rule, it is necessary to maximize the amount of energy delivered to the object. As is well known, scattering of radiation by refractive index inhomogeneities of the medium leads to a decrease of the average intensity in the near-axial region of the light beam and to the appearance of intensity fluctuations, which taken together substantially degrade the energetic characteristics of the indicated systems.
V. P. Lukin,
"Some features of formation of guide sources", Proc. SPIE 5981, Optics in Atmospheric Propagation and Adaptive Systems VIII, 59810Q (14 October 2005); doi: 10.1117/12.656563; https://doi.org/10.1117/12.656563