4 August 2016 Experimental demonstration of a crossed cubes nuller for coronagraphy and interferometry
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Abstract
In this communication we present the first experimental results obtained on the Crossed-cubes nuller (CCN), that is a new type of Achromatic phase shifter (APS) based on a pair of crossed beamsplitter cubes. We review the general principle of the CCN, now restricted to two interferometric outputs for achieving better performance, and describe the experimental apparatus developed in our laboratory. It is cheap, compact, and easy to align. The results demonstrate a high extinction rate in monochromatic light and confirm that the device is insensitive to its polarization state. Finally, the first lessons from the experiment are summarized and discussed in view of future space missions searching for extrasolar planets located in the habitable zone, either based on a coronagraphic telescope or a sparse-aperture nulling interferometer.
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François Hénault, François Hénault, Brahim Arezki, Brahim Arezki, Guillaume Bourdarot, Guillaume Bourdarot, Alain Spang, Alain Spang, } "Experimental demonstration of a crossed cubes nuller for coronagraphy and interferometry", Proc. SPIE 9907, Optical and Infrared Interferometry and Imaging V, 99072H (4 August 2016); doi: 10.1117/12.2231279; https://doi.org/10.1117/12.2231279
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