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Proceedings Paper

Characterization of the digital holographic wavefront sensor
Author(s): Pablo Marin Palomo; Andreas Zepp; Szymon Gładysz
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Paper Abstract

Correction of atmospheric effects on the propagation of laser light can be achieved with adaptive optics (AO) by relying on adequate wavefront sensors. For free-space laser communications and for tracking of high-speed airborne objects, conventional wavefront sensing methods e.g. those based on the Shack-Hartmann sensor (SHS), are not always effective. Partial obscuration and saturation of the detector due to strong turbulence lead to errors in wavefront reconstruction. Another drawback of Shack-Hartmann wavefront-sensing is the timeconsuming readout of the whole detector and subsequent matrix-vector multiplication necessary to reconstruct the wavefront. We characterize a promising modal alternative: digital holographic wavefront sensor (DHWS).We examine the performance of the sensor for single-, and multimode operation and its dependence on the detector size, scintillation, residual tip/tilt and misalignments.

Paper Details

Date Published: 21 October 2014
PDF: 14 pages
Proc. SPIE 9242, Remote Sensing of Clouds and the Atmosphere XIX; and Optics in Atmospheric Propagation and Adaptive Systems XVII, 92421T (21 October 2014); doi: 10.1117/12.2067084
Show Author Affiliations
Pablo Marin Palomo, Fraunhofer Institute of Optronics, System Technologies and Image Exploitation (Germany)
Andreas Zepp, Fraunhofer-Institut für Optronik, Systemtechnik und Bildauswertung (Germany)
Szymon Gładysz, Fraunhofer Institute of Optronics, System Technologies and Image Exploitation (Germany)


Published in SPIE Proceedings Vol. 9242:
Remote Sensing of Clouds and the Atmosphere XIX; and Optics in Atmospheric Propagation and Adaptive Systems XVII
Adolfo Comerón; Karin Stein; John D. Gonglewski; Evgueni I. Kassianov; Klaus Schäfer; Richard H. Picard, Editor(s)

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