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Modal vs. zonal wavefront-sensorless adaptive optics for free-space laser communications

: Segel, Max; Anzuola, Esdras; Gladysz, Szymon; Stein, Karin

Fulltext urn:nbn:de:0011-n-4214330 (381 KByte PDF)
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This paper was published by OSA and is made available as an electronic reprint with the permission of OSA. The paper can be found on the OSA website. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Created on: 17.11.2016

Optical Society of America -OSA-, Washington/D.C.:
Imaging and Applied Optics 2016 : Meeting Congress, 25-28 July 2016, Heidelberg, Germany
Washington, DC: OSA, 2016 (OSA Technical digest series)
ISBN: 978-1-943580-15-6
Paper AOW1B.3, 3 pp.
Imaging and Applied Optics Congress <2016, Heidelberg>
Meeting "Adaptive Optics - Analysis, Methods & Systems" <2016, Heidelberg>
Conference Paper, Electronic Publication
Fraunhofer IOSB ()

Atmospheric effects limit the performance of any electro-optical system. Tasks such as laser communication and delivery of directed energy are significantly affected by turbulence and refraction. A correction of atmospheric effects on the propagation of light can be done by adaptive optics (AO). Unconventional wavefront sensing strategies are being developed to provide alternatives for measuring the wavefront deformation of a laser beam propagating through strong turbulence and/or along a horizontal-path. In this paper we present results from two "wavefrontsensorless" approaches: stochastic parallel gradient descent (SPGD) and its modal version (MSPGD).