The effect of longitudinal overfocusing of the radiation in optical receivers that is due to refractive-index fluctuations in air has been experimentally investigated. The dependence of the magnitude of the source-image plane shift on the turbulence intensity along the path is estimated. It is shown that the use of a variable observation plane, which takes into account the shift of the source image plane with the change in the turbulent state of a medium, permits reduction of the mean spot size by a factor of 1.4-1.6.
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| http://dx.doi.org/10.1364/ol.10.000255 | DOI Listing |
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