Correlation function for intensity fluctuations in fractal randomly inhomogeneous medium

Ray-diffusion equations are used to find an expression for an intensity-fluctuation correlation function. The solution is self-similar, which indicates an absence of field caustics in a fractal randomly inhomogeneous medium.Nizhni Novgorod Institute of Architecture and Civil Engineering. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 36, No. 6, pp. 493–497, June, 1993.