Presentation + Paper
3 September 2021 New method to achieve the proper polarization state for a vector vortex coronagraph
Author Affiliations +
Abstract
Characterizing the atmospheres of Earth-sized planets necessitates of the advancement in broadband wavefront control for coronagraph systems in large segmented telescopes. At the the High-Contrast Spectroscopy Testbed (HCST) in the Exoplanet Technology Laboratory (ET Lab) at Caltech we are working on a new concept that utilizes single mode fibers (SMFs) at the image plane of the coronagraph to recover the light from the planet and feed it into a spectrograph. This technology has shown to be advantageous in both chromatic and wavefront control performance. Here we report on the status of our 20% bandwidth wavefront control experiments, in which we control the starlight coupling into an SMF in the image plane. We achieve levels of 10^-8 with deformable mirror (DM) solutions that hold the null through the SMF for several hours.
Conference Presentation
© (2021) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jorge Llop-Sayson, Cole Kappel, Nemanja Jovanovic, Dimitri Mawet, and Carl Coker "New method to achieve the proper polarization state for a vector vortex coronagraph", Proc. SPIE 11823, Techniques and Instrumentation for Detection of Exoplanets X, 118230P (3 September 2021); https://doi.org/10.1117/12.2594871
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KEYWORDS
Polarization

Coronagraphy

Exoplanets

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