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Proceedings Paper

Multi-axial nulling interferometry: demonstration of deep nulling and investigations of polarization effects
Author(s): Christophe Buisset; Xavier Rejeaunier; Yves Rabbia; Cyril Ruilier; Marc Barillot; Lars Lierstuen; Josep Maria Perdigues Armengol
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Paper Abstract

The ESA-Darwin mission is devoted to direct detection and spectroscopic characterization of earth-like exoplanets in the thermal infrared domain by nulling interferometry in space. This technique yields the rejection of starlight so as to make detectable the faintly emitting planet in the neighborhood. In that context, Alcatel Alenia Space has developed a nulling breadboard for ESA in order to perform the rejection of an unresolved on-axis source. This device, the Multi Aperture Imaging Interferometer (MAII) demonstrated high rejection capability at a relevant level for exoplanets, in single-polarized and mono-chromatic conditions. In this paper we report on our late investigations using the MAII focussed on modal filtering. The dependence of the nulling ratio on the degeneracy of the guided modes in the modal filter is put into evidence.

Paper Details

Date Published: 27 June 2006
PDF: 9 pages
Proc. SPIE 6268, Advances in Stellar Interferometry, 626819 (27 June 2006); doi: 10.1117/12.671113
Show Author Affiliations
Christophe Buisset, Alcatel Alenia Space (France)
Observatoire de la Côte d'Azur (France)
Xavier Rejeaunier, Alcatel Alenia Space (France)
Yves Rabbia, Observatoire de la Côte d'Azur (France)
Cyril Ruilier, Alcatel Alenia Space (France)
Marc Barillot, Alcatel Alenia Space (France)
Lars Lierstuen, Kongsberg Defense and Aerospace (Norway)
Josep Maria Perdigues Armengol, ESA-ESTEC (Netherlands)

Published in SPIE Proceedings Vol. 6268:
Advances in Stellar Interferometry
John D. Monnier; Markus Schöller; William C. Danchi, Editor(s)

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