4 September 2015 Determining beam properties at an inaccessible plane using the reciprocity of atmospheric turbulence
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A turbulent, atmospheric channel can be considered to be reciprocal at any one instance in time. Reciprocity is a powerful property that can be used to compensate for the distortions caused by turbulence such as beam scintillation, spreading, and wander. Here we investigate the use of reciprocity in instances where a beam is propagated to an uncooperative target. Theoretical work [V. P. Lukin and M. I. Charnotskii , Sov. J. Quantum Electron., 12(5), 602 (1982)] has shown that reciprocity principles indicate that properties of the beam incident on a target fluctuate synchronously with the intensity distribution scattered from the target. Here we extend this purely analytical treatment using phase screen simulations. We show that there exists a correlation between the intensity imaged by the receiver and the field incident on the target. Furthermore, we demonstrate that the intensity at a specific location could be used to drive an adaptive optics system that corrects for atmospheric phase distortions.
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W. Nelson, W. Nelson, C. Wu, C. Wu, C. C. Davis, C. C. Davis, } "Determining beam properties at an inaccessible plane using the reciprocity of atmospheric turbulence", Proc. SPIE 9614, Laser Communication and Propagation through the Atmosphere and Oceans IV, 96140E (4 September 2015); doi: 10.1117/12.2190969; https://doi.org/10.1117/12.2190969

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