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Proceedings Paper

Second generation OH suppression filters using multicore fibers
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Paper Abstract

Ground based near-infrared observations have long been plagued by poor sensitivity when compared to visible observations as a result of the bright narrow line emission from atmospheric OH molecules. The GNOSIS instrument recently commissioned at the Australian Astronomical Observatory uses Photonic Lanterns in combination with individually printed single mode fibre Bragg gratings to filter out the brightest OH-emission lines between 1.47 and 1.70μm. GNOSIS, reported in a separate paper in this conference, demonstrates excellent OH-suppression, providing very “clean” filtering of the lines. It represents a major step forward in the goal to improve the sensitivity of ground based near-infrared observation to that possible at visible wavelengths, however, the filter units are relatively bulky and costly to produce. The 2nd generation fibre OH-Suppression filters based on multicore fibres are currently under development. The development aims to produce high quality, cost effective, compact and robust OH-Suppression units in a single optical fibre with numerous isolated single mode cores that replicate the function and performance of the current generation of “conventional” photonic lantern based devices. In this paper we present the early results from the multicore fibre development and multicore fibre Bragg grating imprinting process.

Paper Details

Date Published: 13 September 2012
PDF: 12 pages
Proc. SPIE 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II, 845011 (13 September 2012); doi: 10.1117/12.925923
Show Author Affiliations
R. Haynes, Leibniz-Institut für Astrophysik Potsdam (Germany)
T. A. Birks, Univ. of Bath (United Kingdom)
J. Bland-Hawthorn, The Univ. of Sydney (Australia)
J. L. Cruz, Univ. de Valencia (Spain)
A. Diez, Univ. de Valencia (Spain)
S. C. Ellis, Australian Astronomical Observatory (Australia)
D. Haynes, Leibniz-Institut für Astrophysik Potsdam (Germany)
R. G. Krämer, Friedrich-Schiller-Univ. Jena (Germany)
B. J. Mangan, Univ. of Bath (United Kingdom)
S. Min, The Univ. of Sydney (Australia)
D. F. Murphy, Waterford Institute of Technology (Ireland)
S. Nolte, Friedrich-Schiller-Univ. Jena (Germany)
J. C. Olaya, Leibniz-Institut für Astrophysik Potsdam (Germany)
J. U. Thomas, Friedrich-Schiller-Univ. Jena (Germany)
C. Q. Trinh, The Univ. of Sydney (Australia)
A. Tünnermann, Friedrich-Schiller-Univ. Jena (Germany)
Christian Voigtländer, Friedrich-Schiller-Univ. Jena (Germany)


Published in SPIE Proceedings Vol. 8450:
Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II
Ramón Navarro; Colin R. Cunningham; Eric Prieto, Editor(s)

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