Universität zu Köln

Diener, Romina, Tepper, Jan, Labadie, Lucas ORCID: 0000-0001-5342-5713, Pertsch, Thomas ORCID: 0000-0003-4889-0869, Nolte, Stefan ORCID: 0000-0002-2919-2662 and Minardi, Stefano (2017). Towards 3D-photonic, multi-telescope beam combiners for mid-infrared astrointerferometry. Opt. Express, 25 (16). S. 19262 - 19275. WASHINGTON: OPTICAL SOC AMER. ISSN 1094-4087

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Abstract

In the past two decades high precision optical astronomical interferometry has benefited from the use of photonic technologies. Today, near-infrared interferometric instruments deliver high-resolution, hyperspectral images of astronomical objects and combine up to 4 independent telescopes at a time thanks to integrated optics (IO). Following the success of IO interferometry, several initiatives aim at developing components which could combine simultaneously more telescopes and extend their operation beyond the near-infrared bands. Here we report on the development of multi-telescope IO beam combiners for mid-infrared interferometry exploiting the three-dimensional (3D) structuring capabilities of ultrafast laser inscription. We characterise the capability of a 2-telescope and a 4-telescope beam combiner to retrieve the visibility amplitude and phase of monochromatic light fields at a wavelength of 3.39 mu m. The combiner prototypes exploit different 3D architectures and are written with a femtosecond laser on substrates of gallium lanthanum sulfide. Supporting numerical simulations of the performance of the beam combiners show that there is still room for improvement and indicate a roadmap for the development of future prototypes. (C) 2017 Optical Society of America

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Diener, Romina UNSPECIFIED UNSPECIFIED UNSPECIFIED Tepper, Jan UNSPECIFIED UNSPECIFIED UNSPECIFIED Labadie, Lucas UNSPECIFIED orcid.org/0000-0001-5342-5713 UNSPECIFIED Pertsch, Thomas UNSPECIFIED orcid.org/0000-0003-4889-0869 UNSPECIFIED Nolte, Stefan UNSPECIFIED orcid.org/0000-0002-2919-2662 UNSPECIFIED Minardi, Stefano UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-221931
DOI:	10.1364/OE.25.019262
Journal or Publication Title:	Opt. Express
Volume:	25
Number:	16
Page Range:	S. 19262 - 19275
Date:	2017
Publisher:	OPTICAL SOC AMER
Place of Publication:	WASHINGTON
ISSN:	1094-4087
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics I
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language INTEGRATED-OPTICS; ASTRONOMICAL INTERFEROMETRY; FEMTOSECOND LASER; WAVE-GUIDES; INSTRUMENT; ESTIMATORS; COMPONENT; COUPLERS Multiple languages Optics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/22193