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Proceedings Paper

Numerical propagator through PIAA optics
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Paper Abstract

In this communication we address two outstanding issues pertaining the modeling of PIAA coronagraphs, accurate numerical propagation of edge effects and fast propagation of mid spatial frequencies for wavefront control. In order to solve them, we first derive a quadratic approximation of the Huygens wavelets that allows us to develop an angular spectrum propagator for pupil remapping. Using this result we introduce an independent method to verify the ultimate contrast floor, due to edge propagation effects, of PIAA units currently being tested in various testbeds. We then delve into the details of a novel fast algorithm, based on the recognition that angular spectrum computations with a pre-apodised system are computationally light. When used for the propagation of mid spatial frequencies, such a fast propagator will ultimately allow us to develop robust wavefront control algorithms with DMs located before the pupil remapping mirrors.

Paper Details

Date Published: 19 August 2009
PDF: 13 pages
Proc. SPIE 7440, Techniques and Instrumentation for Detection of Exoplanets IV, 74400E (19 August 2009); doi: 10.1117/12.825189
Show Author Affiliations
Laurent Pueyo, Jet Propulsion Lab. (United States)
Stuart Shaklan, Jet Propulsion Lab. (United States)
Amir Give'on, Jet Propulsion Lab. (United States)
John Krist, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 7440:
Techniques and Instrumentation for Detection of Exoplanets IV
Stuart B. Shaklan, Editor(s)

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