ALEKSANYAN, Artur; BRASSELET, Etienne

doi:10.1364/OL.43.000383

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http://creativecommons.org/licenses/by-nc/

ALEKSANYAN, Artur
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

BRASSELET, Etienne
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

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Article de revue

Ce document a été publié dans

Optics Letters. 2018, vol. 43, n° 3, p. 383-386

Optical Society of America - OSA Publishing

Résumé en anglais

Optical vortex phase masks are now installed at many ground-based large telescopes for high-contrast astronomical imaging. To date, such instrumental advances have been restricted to the use of helical phase masks of the lowest even order, while future giant telescopes will require high-order masks. Here we propose a single-stage on-axis scheme to create high-order vortex coronagraphs based on second-order vortex phase masks. By extending our approach to an off-axis design, we also explore the implementation of multiple-star vortex coronagraphy. An experimental laboratory demonstration is reported and supported by numerical simulations. These results offer a practical roadmap to the development of future coronagraphic tools with enhanced performances.< Réduire

Mots clés en anglais

Spatial filtering

Optical vortices

Astronomical optics

DOI

http://dx.doi.org/10.1364/OL.43.000383

Project ANR

Traitement hyperspectral du moment angulaire orbital de la lumière - ANR-15-CE30-0018

Origine

Importé de hal

Unités de recherche

Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798