SPIRou @CFHT: Fiber links and pupil slicer

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DOIResolve DOI: http://doi.org/10.1117/12.926084
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TypeArticle
Proceedings titleGround-based and Airborne Instrumentation for Astronomy IV
Series titleProceedings of SPIE; Volume 8446
ConferenceGround-Based and Airborne Instrumentation for Astronomy IV, July 1-6, 2012, Amsterdam, Netherlands
ISSN0277-786X
ISBN9780819491473
Article number84462R
SubjectCFHT; Fluoride fibers; FRD; High precision; Pupil slicer; Scrambling; Spectropolarimetry; Cryogenics; Spectrographs; Stars; Velocimeters; Velocity measurement; Fibers
AbstractSPIRou 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.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); National Science Infrastructure
Peer reviewedYes
NPARC number21270294
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Record identifier9a793ccd-5317-486b-8122-81e756ec3d56
Record created2014-01-21
Record modified2016-05-09
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