High-charge and multiple-star vortex coronagraphy from stacked vector vortex phase masks
Idioma
en
Article de revue
Este ítem está publicado en
Optics Letters. 2018, vol. 43, n° 3, p. 383-386
Optical Society of America - OSA Publishing
Resumen en inglés
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 ...Leer más >
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.< Leer menos
Palabras clave en inglés
Spatial filtering
Optical vortices
Astronomical optics
Proyecto ANR
Traitement hyperspectral du moment angulaire orbital de la lumière - ANR-15-CE30-0018
Orígen
Importado de HalCentros de investigación