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Proceedings Paper

Prototype for the European Southern Observatory VLTI fringe sensor
Author(s): Yves Rabbia; Serge Menardi; Jean Gay; Philippe M. Bourlon; Pierre Antonelli; Michel Dugue; J. Marchal; Francois Reynaud; Michel Faucherre; Norbert N. Hubin
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Paper Abstract

The operation of stellar interferometers suffers from turbulence- induced random fluctuations of optical pathlength difference between collected fields. Active compensation needs an error signal which is provided by a fringe sensor. A phase A study for a fringe sensor for the ESO Very Large Telescope Interferometer (VLTI) has been conducted at OCA, leading to a proposition for the completion of a prototype. In this article, the goals and the principle of the sensor are recalled (see Gay and Rabbia, preceding paper, in this symposium). Its optimal working wavelength is discussed. Results of a numerical simulation of the sensor operation are reported, comprising sensitivity estimates. The proposed setup is then described in the details, emphasis being put on monomode optical fiber related items. Finally, current plans for the testing and the future use of the prototype are outlined.

Paper Details

Date Published: 9 June 1994
PDF: 12 pages
Proc. SPIE 2200, Amplitude and Intensity Spatial Interferometry II, (9 June 1994); doi: 10.1117/12.177241
Show Author Affiliations
Yves Rabbia, Observatoire de la Cote d'Azur (France)
Serge Menardi, Observatoire de la Cote d'Azur (France)
Jean Gay, Observatoire de la Cote d'Azur (France)
Philippe M. Bourlon, Observatoire de la Cote d'Azur (France)
Pierre Antonelli, Observatoire de la Cote d'Azur (France)
Michel Dugue, Observatoire de la Cote d'Azur (France)
J. Marchal, Observatoire de la Cote d'Azur (France)
Francois Reynaud, IRCOM (France)
Michel Faucherre, European Southern Observatory (China)
Norbert N. Hubin, European Southern Observatory (Germany)

Published in SPIE Proceedings Vol. 2200:
Amplitude and Intensity Spatial Interferometry II
James B. Breckinridge, Editor(s)

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