The Planar Optics Phase Sensor: a study for the VLTI 2nd Generation Fringe Tracker

  • Nicolas Blinda, Jean-Baptiste LeBouquina, +16 authors Lionel Vincenta
  • Published 2010

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 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.

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Cite this paper

@inproceedings{Blinda2010ThePO, title={The Planar Optics Phase Sensor: a study for the VLTI 2nd Generation Fringe Tracker}, author={Nicolas Blinda and Jean-Baptiste LeBouquina and Olivier Absilb and Mazen Alamire and Jean-Philippe Bergerc and Denis Defr{\`e}reb and Philippe Feautriera and Franois H{\'e}naultd and Laurent Jocoua and Pierre Kerna and Thomas Laurentb and Fabien Malbeta and Denis Mourardd and Karine Rousselet-Perraulta and Alain Sarlettef and Jean Surdejb and Nassima Tarmould and Eric Tatullia and Lionel Vincenta}, year={2010} }