Share Email Print
cover

Proceedings Paper

Multi-axial integrated optics solution for POPS, a 2nd-generation VLTI fringe tracker
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

POPS (Planar Optical Phase Sensor) is a second-generation fringe tracker for the Very Large Telescope Interferometer (VLTI), intended to simultaneously measure the cophasing and coherencing errors of up to six Unit Telescopes (UT) or Auxiliary Telescopes (AT) in real time. The most promising concepts are probably based on the utilization of Integrated Optics (IO) components, and were the scope of a Phase A study led by Observatoire de Grenoble (LAOG). Herein is described a tentative design built around a multi-axial IO chip whose fringes are dispersed downstream on a detector array, and a Chromatic Phase Diversity algorithm presented in another paper of this conference . We depict the foreseen opto-mechanical, detection and software implementations, and provide numerical results from a realistic simulation model in terms of group and phase delay measurement accuracy and limiting magnitudes in the K band. The ultimate performance of the method is discussed and compared with the original 2nd generation VLTI fringe tracker requirements.

Paper Details

Date Published: 22 July 2010
PDF: 12 pages
Proc. SPIE 7734, Optical and Infrared Interferometry II, 773425 (22 July 2010); doi: 10.1117/12.858005
Show Author Affiliations
Nassima Tarmoul, Lab. H. FIZEAU, CNRS, Univ. de Nice Sophia, Observatoire de la Côte d'Azur (France)
François Hénault, Lab. H. FIZEAU, CNRS, Univ. de Nice Sophia, Observatoire de la Côte d'Azur (France)
Denis Mourard, Lab. H. FIZEAU, CNRS, Univ. de Nice Sophia, Observatoire de la Côte d'Azur (France)
Jean-Baptiste Le Bouquin, Univ. Joseph-Fourier, CNRS, Lab. d'Astrophysique de Grenoble (France)
Laurent Jocou, Univ. Joseph-Fourier, CNRS, Lab. d'Astrophysique de Grenoble (France)
Pierre Kern, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Jean-Philippe Berger, European Southern Observatory (Chile)
Olivier Absil, Univ. de Liège (Belgium)


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

© SPIE. Terms of Use
Back to Top