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Proceedings Paper

Chalcogenide glass planar MIR couplers for future chip based Bracewell interferometers
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Paper Abstract

Photonic integrated circuits are established as the technique of choice for a number of astronomical processing functions due to their compactness, high level of integration, low losses, and stability. Temperature control, mechanical vibration and acoustic noise become controllable for such a device enabling much more complex processing than can realistically be considered with bulk optics. To date the benefits have mainly been at wavelengths around 1550 nm but in the important Mid-Infrared region, standard photonic chips absorb light strongly. Chalcogenide glasses are well known for their transparency to beyond 10000 nm, and the first results from coupler devices intended for use in an interferometric nuller for exoplanetary observation in the Mid-Infrared L’ band (3800-4200 nm) are presented here showing that suitable performance can be obtained both theoretically and experimentally for the first fabricated devices operating at 4000 nm.

Paper Details

Date Published: 4 August 2016
PDF: 7 pages
Proc. SPIE 9907, Optical and Infrared Interferometry and Imaging V, 990730 (4 August 2016); doi: 10.1117/12.2232199
Show Author Affiliations
H.-D. Kenchington Goldsmith, Australian National Univ. (Australia)
N. Cvetojevic, The Australian Astronomical Observatory (Australia)
Univ. of Sydney (Australia)
M. Ireland, Australian National Univ. (Australia)
P. Ma, Australian National Univ. (Australia)
P. Tuthill, Univ. of Sydney (Australia)
B. Eggleton, Univ. of Sydney (Australia)
J. S. Lawrence, The Australian Astronomical Observatory (Australia)
Univ. of Sydney (Australia)
Macquarie Univ. (Australia)
S. Debbarma, Australian National Univ. (Australia)
B. Luther-Davies, Australian National Univ. (Australia)
S. J. Madden, Australian National Univ. (Australia)

Published in SPIE Proceedings Vol. 9907:
Optical and Infrared Interferometry and Imaging V
Fabien Malbet; Michelle J. Creech-Eakman; Peter G. Tuthill, Editor(s)

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