Vol. 3, issue 09, article # 2

pdf Lukin I. P. Optical sounding beam parameters in aberrating refraction channels. // Atmospheric and oceanic optics. 1990. V. 3. No. 09. P. 840-915.
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This paper presents a solution for the second-order mutual coherence function an optical sounding beam propagating through a refraction channel with small aberrations. Expressions are derived for the coordinates of the beam center of gravity and effective radius, and the distribution of the sounding beam intensity over its cross section. An analysis of the effects of aberrations of different orders in the channel on optical beam characteristics is made. It is shown that the aberration-free approximation can be used to describe a narrow (in comparison with the width of the refraction channel) sounding beam in a defocusing channel with small aberrations (e.g., with a Gaussian or Gaussian-like profile) only for sounding paths whose length does not exceed a few focal lengths of the refraction channel.