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Proceedings Paper

SPIRou @ CFHT: fiber links and pupil slicer
Author(s): Yoan Micheau; François Bouchy; Francesco Pepe; Bruno Chazelas; Driss Kouach; Laurent Parès; Jean-François Donati; Gregory Barrick; Patrick Rabou; Simon Thibault; Leslie Saddlemyer; Sandrine Perruchot; Xavier Delfosse; Nicolas Striebig; Gérard Gallou; David Loop; John Pazder
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Paper Abstract

SPIRou is a near-IR (0.98-2.35μm), echelle spectropolarimeter / high precision velocimeter being designed as a next-generation instrument for the 3.6m Canada-France-Hawaii Telescope on Mauna Kea, Hawaii, with the main goal of detecting Earth-like planets around low mass stars and magnetic fields of forming stars. The unique scientific and technical capabilities of SPIRou are described in a series of seven companion papers. In this paper, the fiber links which connects the polarimeter unit to the cryogenic spectrograph unit (35 meter apart) are described. The pupil slicer which forms a slit compatible with the spectrograph entrance specifications is also discussed in this paper. Some challenging aspects are presented. In particular this paper will focus on the manufacturing of 35 meter fibers with a very low loss attenuation (< 13dB/km) in the non-usual fiber spectral domain from 0.98 μm to 2.35 μm. Other aspects as the scrambling performance of the fiber links to reach high accuracy radial velocity measurements (1m/s) and the design of the pupil slicer exposed at a cryogenic and vacuum environment will be discussed.

Paper Details

Date Published: 24 September 2012
PDF: 11 pages
Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84462R (24 September 2012); doi: 10.1117/12.926084
Show Author Affiliations
Yoan Micheau, Institut de Recherche en Astrophysique et Planétologie (France)
François Bouchy, Observatoire de Haute-Provence (France)
Francesco Pepe, Observatoire de l'Univ. de Genève (Switzerland)
Bruno Chazelas, Observatoire de l'Univ. de Genève (Switzerland)
Driss Kouach, Institut de Recherche en Astrophysique et Planétologie (France)
Laurent Parès, Institut de Recherche en Astrophysique et Planétologie (France)
Jean-François Donati, Institut de Recherche en Astrophysique et Planétologie (France)
Gregory Barrick, Canada-France-Hawaii Telescope (United States)
Patrick Rabou, Institut de Planétologie et d'Astrophysique de Grenoble (France)
Simon Thibault, Univ. Laval (Canada)
Leslie Saddlemyer, Hertzberg Institute of Astrophysics, National Research Council of Canada (Canada)
Sandrine Perruchot, Observatoire de l'Univ. de Genève (France)
Xavier Delfosse, Institut de Planétologie et d'Astrophysique de Grenoble (France)
Nicolas Striebig, Institut de Recherche en Astrophysique et Planétologie (France)
Gérard Gallou, Institut de Recherche en Astrophysique et Planétologie (France)
David Loop, Hertzberg Institute of Astrophysics, National Research Council of Canada (Canada)
John Pazder, Hertzberg Institute of Astrophysics, National Research Council of Canada (Canada)


Published in SPIE Proceedings Vol. 8446:
Ground-based and Airborne Instrumentation for Astronomy IV
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

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