Universität zu Köln

Errmann, Ronny ORCID: 0000-0002-3683-1952, Minardi, Stefano, Labadie, Lucas ORCID: 0000-0001-5342-5713, Muthusubramanian, Balaji, Dreisow, Felix, Nolte, Stefan ORCID: 0000-0002-2919-2662 and Pertsch, Thomas ORCID: 0000-0003-4889-0869 (2015). Interferometric nulling of four channels with integrated optics. Appl. Optics, 54 (24). S. 7449 - 7455. WASHINGTON: OPTICAL SOC AMER. ISSN 2155-3165

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Abstract

Nulling interferometry has been identified as a competitive technique for the detection of extrasolar planets. In its basic form, the technique consists of combining out-of-phase a single pair of telescopes to effectively null the light of a bright star and reveal the dim glow of the companion. However, in order to mitigate the effect of the stellar leaks through the interferometer, a broad angular central null is required. The hierarchical combination of several pairs of telescopes can accomplish this task. We have manufactured and tested with monochromatic light an integrated optics component, which combines a linear array of four telescopes in the nulling mode envisaged by Angel and Woolf [Astroph. J. 475, 373 -379 (1997).]. By simulating in the laboratory the motion of a star in the sky, we could measure the expected angular transmission of the four-telescope nuller. Moreover, the tests have demonstrated a broad nulling scaling as the fourth power of the baseline delay. (C) 2015 Optical Society of America

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Errmann, Ronny UNSPECIFIED orcid.org/0000-0002-3683-1952 UNSPECIFIED Minardi, Stefano UNSPECIFIED UNSPECIFIED UNSPECIFIED Labadie, Lucas UNSPECIFIED orcid.org/0000-0001-5342-5713 UNSPECIFIED Muthusubramanian, Balaji UNSPECIFIED UNSPECIFIED UNSPECIFIED Dreisow, Felix UNSPECIFIED UNSPECIFIED UNSPECIFIED Nolte, Stefan UNSPECIFIED orcid.org/0000-0002-2919-2662 UNSPECIFIED Pertsch, Thomas UNSPECIFIED orcid.org/0000-0003-4889-0869 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-396264
DOI:	10.1364/AO.54.007449
Journal or Publication Title:	Appl. Optics
Volume:	54
Number:	24
Page Range:	S. 7449 - 7455
Date:	2015
Publisher:	OPTICAL SOC AMER
Place of Publication:	WASHINGTON
ISSN:	2155-3165
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 BEAM COMBINER; WAVE-GUIDES; INSTRUMENTS; PLANETS Multiple languages Optics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/39626