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Proceedings Paper

The planar optics phase sensor: a study for the VLTI 2nd generation fringe tracker
Author(s): Nicolas Blind; Jean-Baptiste Le Bouquin; Olivier Absil; Mazen Alamir; Jean-Philippe Berger; Denis Defrère; Philippe Feautrier; François Hénault; Laurent Jocou; Pierre Kern; Thomas Laurent; Fabien Malbet; Denis Mourard; Karine Rousselet-Perraut; Alain Sarlette; Jean Surdej; Nassima Tarmoul; Eric Tatulli; Lionel Vincent
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Paper Abstract

In a few years, the second generation instruments of the Very Large Telescope Interferometer (VLTI) will routinely provide observations with 4 to 6 telescopes simultaneously. To reach their ultimate performance, they will need a fringe sensor capable to measure in real time the randomly varying optical paths differences. A collaboration between LAOG (PI institute), IAGL, OCA and GIPSA-Lab has proposed the Planar Optics Phase Sensor concept to ESO for the 2nd Generation Fringe Tracker. This concept is based on the integrated optics technologies, enabling the conception of extremely compact interferometric instruments naturally providing single-mode spatial filtering. It allows operations with 4 and 6 telescopes by measuring the fringes position thanks to a spectrally dispersed ABCD method. We present here the main analysis which led to the current concept as well as the expected on-sky performance and the proposed design.

Paper Details

Date Published: 21 July 2010
PDF: 12 pages
Proc. SPIE 7734, Optical and Infrared Interferometry II, 773424 (21 July 2010); doi: 10.1117/12.857114
Show Author Affiliations
Nicolas Blind, Lab. d'Astrophysique de Grenoble (France)
Jean-Baptiste Le Bouquin, Lab. d'Astrophysique de Grenoble (France)
Olivier Absil, Univ. de Liège (Belgium)
Mazen Alamir, GIPSA-lab (France)
Jean-Philippe Berger, European Southern Observatory (Chile)
Denis Defrère, Univ. de Liège (Belgium)
Philippe Feautrier, Lab. d'Astrophysique de Grenoble (France)
François Hénault, Lab. H. FIZEAU, Observatoire de la Côte d'Azur (France)
Laurent Jocou, Lab. d'Astrophysique de Grenoble (France)
Pierre Kern, Lab. d'Astrophysique de Grenoble (France)
Thomas Laurent, Univ. de Liège (Belgium)
Fabien Malbet, Lab. d'Astrophysique de Grenoble (France)
Denis Mourard, Lab. H. FIZEAU, Observatoire de la Côte d'Azur (France)
Karine Rousselet-Perraut, Lab. d'Astrophysique de Grenoble (France)
Alain Sarlette, Univ. de Liège (Belgium)
Jean Surdej, Univ. de Liège (Belgium)
Nassima Tarmoul, Lab. H. FIZEAU, Observatoire de la Côte d'Azur (France)
Eric Tatulli, Lab. d'Astrophysique de Grenoble (France)
Lionel Vincent, Lab. d'Astrophysique de Grenoble (France)
GIPSA-Lab (France)


Published in SPIE Proceedings Vol. 7734:
Optical and Infrared Interferometry II
William C. Danchi; Françoise Delplancke; Jayadev K. Rajagopal, Editor(s)

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