Multi-axial nulling interferometry: demonstration of deep nulling and investigations of polarization effects

Christophe Buisset; Xavier Rejeaunier; Yves Rabbia; Cyril Ruilier; Marc Barillot; Lars Lierstuen; Josep Maria Perdigues Armengol

doi:10.1117/12.671113

27 June 2006 Multi-axial nulling interferometry: demonstration of deep nulling and investigations of polarization effects

Christophe Buisset, Xavier Rejeaunier, Yves Rabbia, Cyril Ruilier, Marc Barillot, Lars Lierstuen, Josep Maria Perdigues Armengol

Author Affiliations +

Proceedings Volume 6268, Advances in Stellar Interferometry; 626819 (2006) https://doi.org/10.1117/12.671113
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

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.

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Christophe Buisset, Xavier Rejeaunier, Yves Rabbia, Cyril Ruilier, Marc Barillot, Lars Lierstuen, and Josep Maria Perdigues Armengol "Multi-axial nulling interferometry: demonstration of deep nulling and investigations of polarization effects", Proc. SPIE 6268, Advances in Stellar Interferometry, 626819 (27 June 2006); https://doi.org/10.1117/12.671113

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