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Proceedings Paper

Broadband wavefront control in a pupil mapping coronagraph
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Paper Abstract

Pupil mapping (a.k.a. Phase-Induced Amplitude Apodization, or PIAA) is a promising technique in high-dynamic range stellar coronagraphy that obtains higher throughput and better inner working angle than any other known approach. As with any coronagraph, the optical surface requirements and the diameter of the controllable region in the image plane are tied to the wavefront control system and optical bandpass. For example, in a monochromatic bandpass, a single ideal deformable mirror (DM) can create a dark hole with a diameter limited by its Nyquist frequency, even for highly aberrated optics. In broadband light, the depth of the dark hole is linked to the wavelength dependence of aberrations, their spatial frequency content, and their propagation through the system. We derive requirements on the surface height and reflectivity power spectral densities for optics in the PIAA system and describe a sequential-DM architecture that will achieve high-contrast over a large optical bandwidth.

Paper Details

Date Published: 19 September 2007
PDF: 11 pages
Proc. SPIE 6693, Techniques and Instrumentation for Detection of Exoplanets III, 66930R (19 September 2007); doi: 10.1117/12.734943
Show Author Affiliations
Stuart B. Shaklan, Jet Propulsion Lab. (United States)
Amir Give'on, Jet Propulsion Lab. (United States)
Ruslan Belikov, Princeton Univ. (United States)
Laurent Pueyo, Princeton Univ. (United States)
Olivier Guyon, National Astronomical Observatory of Japan/Subaru Telescope (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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