3 November 1998 Active compensation for horizontal-line-of-sight turbulence over near-ground paths
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Abstract
Atmospheric turbulence over long horizontal paths perturbs phase in the pupil of an optical communications receiver, and also can cause severe intensity scintillations. We describe a real time wavefront compensation system using PC technology to perform all wavefront control tasks. This system uses a modal correction scheme, and we report the first measurements of residual wavefront taken approximately 1 meter above ground level at 1 km range. The effects of turbulence, scintillations and control bandwidth on the correction are all examined.
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Bruce Martin Levine, Allan Wirth, Herbert DaSilva, Franklin M. Landers, Stacy Clinton, Theresa L. Bruno, Pierre R. Barbier, David W. Rush, Penelope Polak-Dingels, Geoffrey L. Burdge, Douglas P. Looze, "Active compensation for horizontal-line-of-sight turbulence over near-ground paths", Proc. SPIE 3433, Propagation and Imaging through the Atmosphere II, (3 November 1998); doi: 10.1117/12.330220; https://doi.org/10.1117/12.330220
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