Abstract

The deterioration that is due to saturation of a revealing apparatus on high-order moments of intensity is investigated in the case of Furutsu’s distribution. This is a two-parameter distribution and seems suitable for describing intensity fluctuations that are due to atmospheric turbulence in the case of intermediate and strong scintillation. The effect of saturation was shown to depend on only one parameter, αDS, defined as the ratio between the saturation intensity of the system and the mean intensity to be measured, a result already found in the case of a log-normal distribution. An expression of the deteriorated moments is given in terms of αDS and of the two parameters of the distribution. The theoretical results are used to give a qualitative interpretation of measured moments after laser propagation along a 1800-m path above the city of Florence.

© 1986 Optical Society of America

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