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Proceedings Paper

A fiber feed system for a multiple object Doppler instrument at Sloan Telescope
Author(s): Xiaoke Wan; Jian Ge; Pengcheng Guo; Bo Zhao; Lakshminarayan Hariharan; Daniel McDavitt
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Paper Abstract

A fiber feed system has been developed to allow a new generation multiple object Doppler instrument, called the WM Keck Exoplanet Tracker, simultaneously tracking 59 stars for high precision radial velocity measurements for planet detection, and switching among over 500 targets per night. The system includes 27 plug fiber bundles and 3 instrument fiber bundles, and each fiber bundle includes 22 fibers. Individual fibers of a plug fiber bundle are plugged to a plate to receive star lights, and then they are grouped together to form a compact 22-fiber connector. An instrument fiber bundle with a matching fiber bundle connector can connect and disconnect with the plug fiber bundle. The 45 m long instrument fiber bundles deliver the light from the telescope to an environment controlled instrument room in distance. We characterizes the light loses including the position and pointing error of plug connectors, the fiber end reflection, fiber misalignment at the mating connectors, focal ratio degradation and fiber absorption through the long fiber link. All fiber bundles are tested and average total throughput of 61% is achieved.

Paper Details

Date Published: 30 June 2006
PDF: 9 pages
Proc. SPIE 6269, Ground-based and Airborne Instrumentation for Astronomy, 62692T (30 June 2006); doi: 10.1117/12.670858
Show Author Affiliations
Xiaoke Wan, Bryant Space Science Ctr., Univ. of Florida (United States)
Jian Ge, Bryant Space Science Ctr., Univ. of Florida (United States)
Pengcheng Guo, Bryant Space Science Ctr., Univ. of Florida (United States)
Bo Zhao, Bryant Space Science Ctr., Univ. of Florida (United States)
Lakshminarayan Hariharan, Bryant Space Science Ctr., Univ. of Florida (United States)
Daniel McDavitt, Bryant Space Science Ctr., Univ. of Florida (United States)


Published in SPIE Proceedings Vol. 6269:
Ground-based and Airborne Instrumentation for Astronomy
Ian S. McLean; Masanori Iye, Editor(s)

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