Deep nulling in unpolarized light

Details Deep nulling in unpolarized light Deep nulling in unpolarized light

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007spie.6693e..36b&link_type=abstract

Techniques and Instrumentation for Detection of Exoplanets III. Edited by Coulter, Daniel R. Proceedings of the SPIE, Volume 66

Physics

Optics

Scientific paper

In the context of the ESA-Darwin mission, Thales Alenia Space has developed a nulling breadboard for ESA. The Multi Aperture Imaging Interferometer (MAII) first demonstrated deep nulling in both integrated optics and multi-axial combination schemes. More recently, Thales Alenia Space and Observatoire de la Côte d'Azur have been improving the nulling performance of MAII. The work was focused on polarization and the bench was upgraded consequently. Unpolarized and polarized nulling ratios are now quite similar at N ≈ 10-5 over a 5% relative bandwidth, stable over more than one hour. In this paper, we report on the improvements we have implemented in MAII and present our latest results.

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