EDP Sciences
Free access
Volume 498, Number 3, May II 2009
Page(s) 931 - 947
Section Astronomical instrumentation
DOI http://dx.doi.org/10.1051/0004-6361/200809726
Published online 05 March 2009
A&A 498, 931-947 (2009)
DOI: 10.1051/0004-6361/200809726

The effect of the longitudinal polarization component in multi-axial nulling interferometry for exoplanet detection

J. F. P. Spronck and S. F. Pereira

Optics Research Group, Dept. of Imaging Science and Technology, Faculty of Applied Sciences, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
    e-mail: julspronck@gmail.com

Received 5 March 2008 / Accepted 3 February 2009

We show a fundamental limitation of multi-axial beam combiners in nulling interferometry. The longitudinal electric field induced by the focusing optics can drastically limit the performance of such a nulling interferometer. We further analyze the filtering capabilities of a single-mode optical fiber with respect to that longitudinal field.

Key words: technique: interferometric -- instrumentation: interferometers

© ESO 2009