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  Correction of differential chromatic dispersion in GRAVITY

Haubois, X., Lacour, S., Perrin, G. S., Dembet, R., Le Bouquin, J.-B., Lapeyrère, V., et al. (2018). Correction of differential chromatic dispersion in GRAVITY.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0005-CD68-0 Version Permalink: https://hdl.handle.net/21.11116/0000-0005-CD69-F
Genre: Proceedings

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https://ui.adsabs.harvard.edu/abs/2018SPIE10701E..1PH (Any fulltext)
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 Creators:
Haubois, Xavier1, Author
Lacour, Sylvestre1, Author
Perrin, Guy S.1, Author
Dembet, Roderick1, Author
Le Bouquin, Jean-Baptiste1, Author
Lapeyrère, Vincent1, Author
Wolff, Burkhard1, Author
Eisenhauer, Frank1, Author
Rousselet-Perraut, Karine1, Author
Straubmeier, Christian1, Author
Amorim, Antonio1, Author
Brandner, Wolfgang1, Author
Affiliations:
1Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners, ou_2421692              

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 Abstract: The GRAVITY instrument installed at VLTI uses differential fibered delay lines to spatially filter the incoming wavefronts and accurately control the optical path difference between the Fringe Tracker (FT) and Scientific Detector (SC) parts of the instrument. On top of the differential dispersion occurring in the air, the chromatic dispersion introduced by these fibers impacts the real time performances of the fringe tracker by generating a second-order chromatic phase shift. Moreover, differential dispersion also affects GRAVITY dual-feed measurements that require a length adjustment of both FT and SC fibers. In this contribution, we show how chromatic dispersion can be corrected both in the fringe tracker real-time control as well as in the astrometric data reduction.

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 Dates: 2018
 Publication Status: Issued
 Pages: -
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 Rev. Type: -
 Identifiers: ISBN: 9781510619555
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Title: Optical and Infrared Interferometry and Imaging VI
Place of Event: -
Start-/End Date: 2018

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