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Proceedings Paper

Advances in broadband-integrated optic beam combiners for mid-IR astronomical interferometers
Author(s): Jan Tepper; Romina Diener; Lucas Labadie; Stefano Minardi; Robert R. Thomson; Stefan Nolte
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Paper Abstract

Photonic technology has pushed the limits of astronomy ever more in recent years. Especially, integrated optics (IO) has led to new standards in accuracy and stability in the field of astronomical interferometry where several beams need to be coherently and simultaneously combined. We follow and extend the IO concept by writing mid-IR waveguides in gallium lanthanum sulfide (GLS) using Ultrafast Laser Writing (ULI). Here, we report on the monochromatic and broadband interferometric capabilities in the mid-IR of such combiners. Finally, we outline the way to a fiber-fed IO 4-telescope instrument for next-generation astronomical interferometers.

Paper Details

Date Published: 20 February 2017
PDF: 6 pages
Proc. SPIE 10110, Photonic Instrumentation Engineering IV, 101100D (20 February 2017); doi: 10.1117/12.2249986
Show Author Affiliations
Jan Tepper, Univ. zu Köln (Germany)
Romina Diener, Friedrich-Schiller-Univ. Jena (Germany)
Lucas Labadie, Univ. zu Köln (Germany)
Stefano Minardi, Friedrich-Schiller-Univ. Jena (Germany)
Leibniz-Institut für Astrophysik Potsdam (Germany)
Robert R. Thomson, Heriot-Watt Univ. (United Kingdom)
Stefan Nolte, Friedrich-Schiller-Univ. Jena (Germany)

Published in SPIE Proceedings Vol. 10110:
Photonic Instrumentation Engineering IV
Yakov G. Soskind; Craig Olson, Editor(s)

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