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Proceedings Paper

Focal plane wavefront sensing and control for ground-based imaging
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Paper Abstract

We evaluate the performance of existing wavefront sensing and control techniques, including speckle nulling and electric field conjugation, and discuss their applicability to high-contrast imaging spectrographs such as the Gemini Planet Imager (GPI). These techniques can be highly useful in correcting system phase errors, and can potentially improve instrument operating efficiency by working in conjunction with the dedicated adaptive optics (AO) wavefront sensor. We discuss the specifics of our implementation of speckle suppression for GPI and present lab demonstrations with average contrast improvements from 5.7x10-6 to 1.03x10-6.

Paper Details

Date Published: 13 September 2012
PDF: 11 pages
Proc. SPIE 8447, Adaptive Optics Systems III, 84476S (13 September 2012); doi: 10.1117/12.926353
Show Author Affiliations
Dmitry Savransky, Lawrence Livermore National Lab. (United States)
Bruce A. Macintosh, Lawrence Livermore National Lab. (United States)
Sandrine J. Thomas, Gemini Observatory (Chile)
Lisa A. Poyneer, Lawrence Livermore National Lab. (United States)
David W. Palmer, Lawrence Livermore National Lab. (United States)
Robert J. De Rosa, Univ. of Exeter (United Kingdom)
Markus Hartung, Gemini Observatory (Chile)

Published in SPIE Proceedings Vol. 8447:
Adaptive Optics Systems III
Brent L. Ellerbroek; Enrico Marchetti; Jean-Pierre Véran, Editor(s)

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