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Proceedings Paper • Open Access

Achromatic phase shifters for nulling interferometry
Author(s): Yves Rabbia; Jean Gay; Etienne Bascou

Paper Abstract

In the search for extra-solar Earth-like planets, nulling interferometry is required. This technique provides the extinction of the light from the parent star so as to "see" objects in its immediate vicinity. This nulling process is based on appropriate phase shifts applied to the collected waves made to destructively interfere. These phase shifts must be performed in the thermal infrared domain and must be achromatic so as to enable working on a large bandwidth.

After briefly recalling the principle of nulling interferometry, we state what should mean "achromatic" in the context and we present various techniques potentially able to meet the stated requirements. Critical points and interesting features of the presented techniques are outlined.

Paper Details

Date Published: 21 November 2017
PDF: 14 pages
Proc. SPIE 10569, International Conference on Space Optics — ICSO 2000, 1056916 (21 November 2017); doi: 10.1117/12.2307870
Show Author Affiliations
Yves Rabbia, Observatoire de la Côte d'Azur (France)
Jean Gay, Observatoire de la Côte d'Azur (France)
Etienne Bascou, ENSPM (France)

Published in SPIE Proceedings Vol. 10569:
International Conference on Space Optics — ICSO 2000
Georges Otrio, Editor(s)

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