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Proceedings Paper

Characterizing octagonal and rectangular fibers for MAROON-X
Author(s): Adam P. Sutherland; Julian Stuermer; Katrina R. Miller; Andreas Seifahrt; Jacob L. Bean
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Paper Abstract

We report on the scrambling performance and focal-ratio-degradation (FRD) of various octagonal and rectangular fibers considered for MAROON-X. Our measurements demonstrate the detrimental effect of thin claddings on the FRD of octagonal and rectangular fibers and that stress induced at the connectors can further increase the FRD. We find that fibers with a thick, round cladding show low FRD. We further demonstrate that the scrambling behavior of non-circular fibers is often complex and introduce a new metric to fully capture non-linear scrambling performance, leading to much lower scrambling gain values than are typically reported in the literature (≤1000 compared to 10,000 or more). We find that scrambling gain measurements for small-core, non-circular fibers are often speckle dominated if the fiber is not agitated.

Paper Details

Date Published: 22 July 2016
PDF: 10 pages
Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 99125C (22 July 2016); doi: 10.1117/12.2231707
Show Author Affiliations
Adam P. Sutherland, The Univ. of Chicago (United States)
The Univ. of Arizona (United States)
Julian Stuermer, The Univ. of Chicago (United States)
Katrina R. Miller, The Univ. of Chicago (United States)
Duke Univ. (United States)
Andreas Seifahrt, The Univ. of Chicago (United States)
Jacob L. Bean, The Univ. of Chicago (United States)


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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