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Birefringent achromatic phase shifters for nulling interferometry and phase coronagraphy

Mawet, D. and Baudrand, J. and Lenaerts, C. and Moreau, V. and Riaud, P. and Rouan, D. and Surdej, J. (2003) Birefringent achromatic phase shifters for nulling interferometry and phase coronagraphy. In: Towards Other Earths: DARWIN/TPF and the Search for Extrasolar Terrestrial Planets. ESA Special Publication. No.539. ESA Publications , Noordick, Netherlands, pp. 519-524. ISBN 92-9092-849-2. https://resolver.caltech.edu/CaltechAUTHORS:20150519-134722638

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Abstract

Achromatic Phase Shifters are mandatory components in the field of nulling interferometry and phase coronagraphy. Indeed, in order to detect faint objects (e.g. exo-planets) around a central bright star, one must attenuate the latter by all means. To do this, the most efficient way is to “create” a destructive interference on the blinding light. This technique is called nulling and is common to the two fields mentioned above; the first with several telescopes, the second with only a single aperture. How does it work? The incoming light from the central object is divided into several beams on which one applies a differential π phase shift by means of these so-called phase shifters. Then, when the beams are properly recombined together, they simply subtract from each other. “Achromatic” means that we can apply this process over a large spectral bandwidth. This quality will not only be required for the detection and characterization of exo-planets but also for several other astrophysical objects involving huge contrasts like dust shells around young bright stars, AGN,... The proposed birefringent phase shifters and the original implementation schemes we suggest should provide flexible and powerful solutions for these purposes.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
http://adsabs.harvard.edu/full/2003ESASP.539..519MADSArticle
ORCID:
AuthorORCID
Mawet, D.0000-0002-8895-4735
Surdej, J.0000-0002-7005-1976
Additional Information:© 2003 ESA Publications.
Series Name:ESA Special Publication
Issue or Number:539
Record Number:CaltechAUTHORS:20150519-134722638
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150519-134722638
Official Citation:Birefringent achromatic phase shifters for nulling interferometry and phase coronagraphy Authors: Mawet, D., Baudrand, J., Lenaerts, C., Moreau, V., Riaud, P., Rouan, D., , Journal: In: Proceedings of the Conference on Towards Other Earths: DARWIN/TPF and the Search for Extrasolar Terrestrial Planets, 22-25 April 2003, Heidelberg, Germany. Edited by M. Fridlund, T. Henning, compiled by H. Lacoste. ESA SP-539, Noordwijk, Netherlands: ESA Publications Division, ISBN 92-9092-849-2, 2003, p. 519 - 524
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57666
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:19 May 2015 21:15
Last Modified:29 Oct 2019 23:44

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