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Proceedings Paper

Demonstration of nulling using delay line phase shifters
Author(s): Casper van der Avoort; Arjan Mieremet; Silvania F. Pereira; Joseph J. M. Braat
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Paper Abstract

We present results of experiments obtained using a new nulling technique that enables deep nulling without the use of achromatic phase shifters. The experimental set-up consists of a three-beam interferometer that should provide a nulling depth of several thousands over a wavelength range of 500 to 650 nm. The intended depth of null was not achieved and further experiments on determining the spectrum of each beam revealed why. We describe a method of obtaining accurate beam spectra in a multi-beam interferometer. The insights on the need of spectral shape control were tested with our nulling theory and proved the sensitivity of this nulling approach with respect to spectral mismatches.

Paper Details

Date Published: 20 October 2004
PDF: 8 pages
Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004); doi: 10.1117/12.551176
Show Author Affiliations
Casper van der Avoort, Delft Univ. of Technology (Netherlands)
Space Research Organization of the Netherlands (Netherlands)
Arjan Mieremet, cosine Research BV (Netherlands)
Silvania F. Pereira, Delft Univ. of Technology (Netherlands)
Joseph J. M. Braat, Delft Univ. of Technology (Netherlands)

Published in SPIE Proceedings Vol. 5491:
New Frontiers in Stellar Interferometry
Wesley A. Traub, Editor(s)

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