Fully achromatic nulling interferometer (FANI) for high SNR exoplanet characterization

François Hénault

doi:10.1117/12.2186750

11 September 2015 Fully achromatic nulling interferometer (FANI) for high SNR exoplanet characterization

François Hénault

Proceedings Volume 9605, Techniques and Instrumentation for Detection of Exoplanets VII; 960512 (2015) https://doi.org/10.1117/12.2186750
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

Space-borne nulling interferometers have long been considered as the best option for searching and characterizing extrasolar planets located in the habitable zone of their parent stars. Solutions for achieving deep starlight extinction are now numerous and well demonstrated. However they essentially aim at realizing an achromatic central null in order to extinguish the star. In this communication is described a major improvement of the technique, where the achromatization process is extended to the entire fringe pattern. Therefore higher Signal-to-noise ratios (SNR) and appreciable simplification of the detection system should result. The basic principle of this Fully achromatic nulling interferometer (FANI) consists in inserting dispersive elements along the arms of the interferometer. Herein this principle is explained and illustrated by a preliminary optical system design. The typical achievable performance and limitations are discussed and some initial tolerance requirements are also provided.

Citation Download Citation

François Hénault "Fully achromatic nulling interferometer (FANI) for high SNR exoplanet characterization", Proc. SPIE 9605, Techniques and Instrumentation for Detection of Exoplanets VII, 960512 (11 September 2015); https://doi.org/10.1117/12.2186750

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