Universität zu Köln

Nayak, Abani Shankar ORCID: 0000-0002-4666-9282, Labadie, Lucas, Sharma, Tarun Kumar, Piacentini, Simone, Corrielli, Giacomo ORCID: 0000-0002-1329-8972, Osellame, Roberto ORCID: 0000-0002-4457-9902, Gendron, Eric, Buey, Jean-Tristan M., Chemla, Fanny, Cohen, Mathieu, Bharmal, Nazim A., Bardou, Lisa F., Staykov, Lazar, Osborn, James ORCID: 0000-0002-9079-1883, Morris, Timothy J., Pedretti, Ettore, Dinkelaker, Aline N., Madhav, Kalaga, V and Roth, Martin M. (2021). First stellar photons or an integrated optics discrete beam combiner at the William Herschel Telescope. Appl. Optics, 60 (19). S. D129 - 14. WASHINGTON: OPTICAL SOC AMER. ISSN 2155-3165

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Abstract

We present the first on-sky results of a four-telescope integrated optics discrete beam combiner (DBC) tested at the 4.2 m William Herschel Telescope. The device consists of a four-input pupil remapper followed by a DBC and a 23-output reformatter. The whole device was written monolithically in a single alumino-borosilicate substrate using ultrafast laser inscription. The device was operated at astronomical H-band (1.6 mu m), and a deformable mirror along with a microlens array was used to inject stellar photons into the device. We report the measured visibility amplitudes and closure phases obtained on Vega and Altair that are retrieved using the calibrated transfer matrix of the device. While the coherence function can be reconstructed, the on-sky results show significant dispersion from the expected values. Based on the analysis of comparable simulations, we find that such dispersion is largely caused by the limited signal-to-noise ratio of our observations. This constitutes a first step toward an improved validation of the DBC as a possible beam combination scheme for long-baseline interferometry. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Nayak, Abani Shankar UNSPECIFIED orcid.org/0000-0002-4666-9282 UNSPECIFIED Labadie, Lucas UNSPECIFIED UNSPECIFIED UNSPECIFIED Sharma, Tarun Kumar UNSPECIFIED UNSPECIFIED UNSPECIFIED Piacentini, Simone UNSPECIFIED UNSPECIFIED UNSPECIFIED Corrielli, Giacomo UNSPECIFIED orcid.org/0000-0002-1329-8972 UNSPECIFIED Osellame, Roberto UNSPECIFIED orcid.org/0000-0002-4457-9902 UNSPECIFIED Gendron, Eric UNSPECIFIED UNSPECIFIED UNSPECIFIED Buey, Jean-Tristan M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chemla, Fanny UNSPECIFIED UNSPECIFIED UNSPECIFIED Cohen, Mathieu UNSPECIFIED UNSPECIFIED UNSPECIFIED Bharmal, Nazim A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bardou, Lisa F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Staykov, Lazar UNSPECIFIED UNSPECIFIED UNSPECIFIED Osborn, James UNSPECIFIED orcid.org/0000-0002-9079-1883 UNSPECIFIED Morris, Timothy J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pedretti, Ettore UNSPECIFIED UNSPECIFIED UNSPECIFIED Dinkelaker, Aline N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Madhav, Kalaga, V UNSPECIFIED UNSPECIFIED UNSPECIFIED Roth, Martin M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-600537
DOI:	10.1364/AO.423881
Journal or Publication Title:	Appl. Optics
Volume:	60
Number:	19
Page Range:	S. D129 - 14
Date:	2021
Publisher:	OPTICAL SOC AMER
Place of Publication:	WASHINGTON
ISSN:	2155-3165
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PHASE; INTERFEROMETRY; INSTRUMENT Multiple languages Optics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/60053