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Proceedings Paper

Optimal non-circular fiber geometries for image scrambling in high-resolution spectrographs
Author(s): Julian Stürmer; Christian Schwab; Stephan Grimm; André Kalide; Adam P. Sutherland; Andreas Seifahrt; Kay Schuster; Jacob L. Bean; Andreas Quirrenbach
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Paper Abstract

Optical fibers are a key component for high-resolution spectrographs to attain high precision in radial velocity measurements. We present a custom fiber with a novel core geometry - a 'D'-shape. From a theoretical standpoint, such a fiber should provide superior scrambling and modal noise mitigation, since unlike the commonly used circular and polygonal fiber cross sections, it shows chaotic scrambling. We report on the fabrication process of a test fiber and compare the optical properties, scrambling performance, and modal noise behaviour of the D-fiber with those of common polygonal fibers.

Paper Details

Date Published: 22 July 2016
PDF: 7 pages
Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 99121T (22 July 2016); doi: 10.1117/12.2234552
Show Author Affiliations
Julian Stürmer, The Univ. of Chicago (United States)
Christian Schwab, Macquarie Univ. (Australia)
Australian Astronomical Observatory (Australia)
Stephan Grimm, Leibniz-Institut für Photonische Technologien e.V. (Germany)
André Kalide, Leibniz-Institut für Photonische Technologien e.V. (Germany)
Adam P. Sutherland, The Univ. of Chicago (United States)
Andreas Seifahrt, The Univ. of Chicago (United States)
Kay Schuster, Leibniz-Institut für Photonische Technologien e.V. (Germany)
Jacob L. Bean, The Univ. of Chicago (United States)
Andreas Quirrenbach, Landessternwarte Heidelberg (Germany)


Published in SPIE Proceedings Vol. 9912:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II
Ramón Navarro; James H. Burge, Editor(s)

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