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Proceedings Paper

Performance study of integrated coronograph-adaptive optics designs
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Paper Abstract

Direct imaging of exo-planets requires that an effcient starlight suppression system and wavefront compensator work together to achieve a stable null whose contrast level is deep enough. The performances of several con- figurations for these two sub-systems have been extensively studied over the past few years, with particular attention being paid to the following four quantities and their relationship: throughput, contrast level, Inner Working Angle and bandwidth. In this paper we propose a new approach that considers starlight suppression and wavefront correction as a unique integrated component that is the association of a shaped-pupil and two sequential deformable mirrors that operate simultaneously as a short stroke pupil mapping device and a wavefront compensator. To do so we first develop a new method based on Huygens wavelets to explain the contrast limits of pupil mapping due to propagation, and study the hybrid associations of PIAA systems and shaped pupils that have been introduced in order to mitigate these effects. Then, since two cascaded deformable mirrors are also a wavelength independent amplitude actuator, we argue that they could be used in conjunction with shaped pupils to carry some of the apodisation load and thus increase the throughput of the new hybrid system.

Paper Details

Date Published: 19 September 2007
PDF: 10 pages
Proc. SPIE 6693, Techniques and Instrumentation for Detection of Exoplanets III, 669314 (19 September 2007); doi: 10.1117/12.735093
Show Author Affiliations
Laurent Pueyo, Princeton Univ. (United States)
Ruslan Belikov, Princeton Univ. (United States)
Jeremy Kasdin, Princeton Univ. (United States)
Robert Vanderbei, Princeton Univ. (United States)

Published in SPIE Proceedings Vol. 6693:
Techniques and Instrumentation for Detection of Exoplanets III
Daniel R. Coulter, Editor(s)

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