The planar optics phase sensor: a study for the VLTI 2nd generation fringe tracker

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

doi:10.1117/12.857114

21 July 2010 The planar optics phase sensor: a study for the VLTI 2nd generation fringe tracker

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

Author Affiliations +

Proceedings Volume 7734, Optical and Infrared Interferometry II; 773424 (2010) https://doi.org/10.1117/12.857114
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

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 2^nd 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.

Citation Download Citation

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, and Lionel Vincent "The planar optics phase sensor: a study for the VLTI 2nd generation fringe tracker", Proc. SPIE 7734, Optical and Infrared Interferometry II, 773424 (21 July 2010); https://doi.org/10.1117/12.857114

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