Vol. 18, issue 01-02, article # 11

Abstract:

When solving problems of optical location, communication, and energy transmission, a task appears of transporting radiant energy in the form of a light beam to an object located in a randomly inhomogeneous medium. In this case, as a rule, it is necessary to maximize the amount of energy delivered to the object. As is well known, radiation scattering by inhomogeneities of the refractive index 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. Several simple variants of the adaptive control for beam parameters, based on the principle of reciprocity of radiation propagation through an inhomogeneous medium, are proposed. The information on the medium inhomogeneties distribution along the beam propagation path is derived from the intensity distribution in the image plane of an object.