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Proceedings Paper

The VSI/VITRUV combiner: a phase-shifted four-beam integrated optics combiner
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Paper Abstract

We present a new four-telescope integrated optics (IO) beam combiner in the near-infrared H band, and preliminary photometric and interferometric measurements obtained in laboratory. The combiners tested and characterized in our experiments are at the heart of the VSI/VITRUV instrument, whose goal is to combine four to six telescopes of the VLTI. In this paper, we describe the combiners which incorporate phase-shifting devices and their characterization through the analysis of polarization properties, instrumental visibilities and phases. Our results were obtained with an eight-telescope laboratory interferometer, specially developed to simulate the VLTI. These results demonstrate one more time that the integrated optics technology is particularly well suited for interferometric combination of multiple beams, and therefore to achieve aperture synthesis imaging with the VSI/VITRUV instrument.

Paper Details

Date Published: 28 June 2006
PDF: 6 pages
Proc. SPIE 6268, Advances in Stellar Interferometry, 62682D (28 June 2006); doi: 10.1117/12.669432
Show Author Affiliations
Myriam Benisty, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Jean-Philippe Berger, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Laurent Jocou, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Fabien Malbet, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Karine Perraut, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Pierre Labeye, CEA-LETI (France)
Pierre Kern, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)


Published in SPIE Proceedings Vol. 6268:
Advances in Stellar Interferometry
John D. Monnier; Markus Schöller; William C. Danchi, Editor(s)

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