Optimal non-circular fiber geometries for image scrambling in high-resolution spectrographs

Julian Stürmer; Christian Schwab; Stephan Grimm; André Kalide; Adam P. Sutherland; Andreas Seifahrt; Kay Schuster; Jacob L. Bean; Andreas Quirrenbach

doi:10.1117/12.2234552

22 July 2016 Optimal non-circular fiber geometries for image scrambling in high-resolution spectrographs

Julian Stürmer, Christian Schwab, Stephan Grimm, André Kalide, Adam P. Sutherland, Andreas Seifahrt, Kay Schuster, Jacob L. Bean, Andreas Quirrenbach

Author Affiliations +

Proceedings Volume 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II; 99121T (2016) https://doi.org/10.1117/12.2234552
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

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.

Citation Download Citation

Julian Stürmer, Christian Schwab, Stephan Grimm, André Kalide, Adam P. Sutherland, Andreas Seifahrt, Kay Schuster, Jacob L. Bean, and Andreas Quirrenbach "Optimal non-circular fiber geometries for image scrambling in high-resolution spectrographs", Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 99121T (22 July 2016); https://doi.org/10.1117/12.2234552

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