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Proceedings Paper

GHOST optical fiber system
Author(s): Vladimir Churilov; Ross Zhelem; Scott Case; Yuriy Kondrat; Kristin Fiegert; Lewis Waller; Jon Lawrence; Michael L. Edgar; Gabriella Baker; Michael Ireland
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Paper Abstract

The Gemini High-Resolution Optical SpecTrograph (GHOST) is the newest instrument being developed for the Gemini telescopes, in a collaboration between the Australian Astronomical Observatory (AAO), the Herzberg Institute for Astrophysics, National Research Council (HIA-NRC) in Canada, and the Australian National University. This paper describes the design of the fiber optic system, developed by AAO. This system links the GHOST multi-object positioner, mounted on Gemini's Cassegrain focus, with the HIA-NRC developed spectrograph, located in the pier lab, 20 meters below the main observatory floor. The GHOST optical cable consists of 62 fibers, Polymicro FBP53/74/94P (53 μm core, 94 μm polyimide buffer), packed into 8 furcation tubes. The optical fibers are held inside the furcation tubes by friction, with between one and twelve fibers in each of the individual tubes. The furcation tubes are mechanically secured to manifold and anchor assemblies by bonding to integral Kevlar yarn within the tubing. The cable includes an interlock switch, linked to the telescope control system, to halt all telescope motions if the cable becomes overstressed. Fibers are terminated by two integral field units (IFU1 and IFU2), guiding and science slits and a calibration light entry port. Mode scrambling is achieved by mechanical agitation in two orthogonal directions, with adjustable frequency and amplitude of up to 10 Hz and 50 mm, respectively.

Paper Details

Date Published: 6 July 2018
PDF: 12 pages
Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 1070269 (6 July 2018); doi: 10.1117/12.2312401
Show Author Affiliations
Vladimir Churilov, Australian Astronomical Observatory (Australia)
Ross Zhelem, Australian Astronomical Observatory (Australia)
Scott Case, Australian Astronomical Observatory (Australia)
Yuriy Kondrat, Australian Astronomical Observatory (Australia)
Kristin Fiegert, Australian Astronomical Observatory (Australia)
Lewis Waller, Australian Astronomical Observatory (Australia)
Jon Lawrence, Australian Astronomical Observatory (Australia)
Michael L. Edgar, Australian Astronomical Observatory (Australia)
Gabriella Baker, Australian Astronomical Observatory (Australia)
Michael Ireland, The Australian National Univ. (Australia)


Published in SPIE Proceedings Vol. 10702:
Ground-based and Airborne Instrumentation for Astronomy VII
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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