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Proceedings Paper

Understanding incomplete scrambling in fibres: experimental investigations
Author(s): U. Lemke; J. R. Allington-Smith; J. Stürmer
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Paper Abstract

Recent advances in detection and characterization of exo-planets have led to increasing standards for repeatability of spectral-line detection of novel high-resolution spectrographs. This is important for exo-planet research but also has its impact on astroseismology and the study of variable stars. For these purposes optical fibres bear a huge advantage due to their improved scrambling ability - but this is subject to fundamental limits. This investigation gives experimental support for the theoretical proposals made in a companion paper which uses a ray-tracing approach. We will concentrate on the mechanisms that cause incomplete scrambling in order to gain insight in the true nature of scrambling, unlike previous mainly phenomenological studies. We describe the experimental setup that will be used to determine the fibre response to input beam parameters like focal ratio, tilt and offset. Preliminary experimental results are consistent with the theoretical predictions made and thus motivating a further exploration of these phenomena.

Paper Details

Date Published: 13 September 2012
PDF: 9 pages
Proc. SPIE 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II, 845035 (13 September 2012); doi: 10.1117/12.926148
Show Author Affiliations
U. Lemke, Georg-August-Univ. Göttingen (Germany)
Durham Univ. (United Kingdom)
J. R. Allington-Smith, Durham Univ. (United Kingdom)
J. Stürmer, ZAH Landessternwarte Heidelberg (Germany)

Published in SPIE Proceedings Vol. 8450:
Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II
Ramón Navarro; Colin R. Cunningham; Eric Prieto, Editor(s)

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