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Proceedings Paper

VELOCE’s novel IFU-fitted fibre feed
Author(s): Scott Case; Vladimir Churilov; Ross Zhelem; Anthony Horton; Jon Lawrence; Michael Edgar; Tony Farrell; Lewis Waller; Yevgen Kripak; Doug Gray; Christopher Ramage; Steve Lee; Mike Ireland; Christian Schwab; Chris Tinney
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Paper Abstract

VELOCE is an IFU fibre feed and spectrograph for the AAT that is replacing CYCLOPS2. It is being constructed by the AAO and ANU. In this paper we discuss the design and engineering of the IFU/fibre feed components of the cable. We discuss the mode scrambling gain obtained with octagonal core fibres and how these octagonal core fibres should be spliced to regular circular core fibres to ensure maximum throughput for the cable using specialised splicing techniques. In addition we also describe a new approach to manufacturing a precision 1D/2D array of optical fibres for some applications in IFU manufacture and slit manufacture using 3D printed fused silica substrates, allowing for a cheap substitute to expensive lithographic etching in silicon at the expense of positional accuracy. We also discuss the Menlo Systems laser comb which employs endlessly-singlemode fibre to eliminate modal noise associated with multimode fibre transmission to provide the VELOCE spectrograph with a stable and repeatable source of wavelength calibration lines.

Paper Details

Date Published: 6 July 2018
PDF: 8 pages
Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107026E (6 July 2018); doi: 10.1117/12.2312939
Show Author Affiliations
Scott Case, Australian Astronomical Observatory (Australia)
Vladimir Churilov, Australian Astronomical Observatory (Australia)
Ross Zhelem, Australian Astronomical Observatory (Australia)
Anthony Horton, Australian Astronomical Observatory (Australia)
Jon Lawrence, Australian Astronomical Observatory (Australia)
Michael Edgar, Australian Astronomical Observatory (Australia)
Tony Farrell, Australian Astronomical Observatory (Australia)
Lewis Waller, Australian Astronomical Observatory (Australia)
Yevgen Kripak, Australian Astronomical Observatory (Australia)
Doug Gray, Anglo-Australian Telescope, Australian Astronomical Observatory (Australia)
Christopher Ramage, Anglo-Australian Telescope, Australian Astronomical Observatory (Australia)
Steve Lee, Anglo-Australian Telescope, Australian Astronomical Observatory (Australia)
Mike Ireland, The Australian National Univ. (Australia)
Christian Schwab, Macquarie Univ. (Australia)
Chris Tinney, The Univ. of New South Wales (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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