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New method to achieve the proper polarization state for a vector vortex coronagraph

Llop-Sayson, Jorge and Kappel, Cole and Jovanovic, Nemanja and Mawet, Dimitri (2021) New method to achieve the proper polarization state for a vector vortex coronagraph. In: Techniques and Instrumentation for Detection of Exoplanets X. Proceedings of SPIE. No.11823. Society of Photo-Optical Instrumentation Engineers , Bellingham, WA, Art. No. 118230P. ISBN 9781510644847. https://resolver.caltech.edu/CaltechAUTHORS:20211018-185302996

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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.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.2594871DOIArticle
https://arxiv.org/abs/2108.07371arXivDiscussion Paper
ORCID:
AuthorORCID
Llop-Sayson, Jorge0000-0002-3414-784X
Jovanovic, Nemanja0000-0001-5213-6207
Mawet, Dimitri0000-0002-8895-4735
Additional Information:© 2021 Society of Photo-Optical Instrumentation Engineers (SPIE). The material is based upon work supported by NASA SAT under award No. 80NSSC20K0624. C. K. is supported by the Caltech WAVE program. J.L.-S. thanks Garreth Ruane for helpful discussions.
Group:Astronomy Department
Funders:
Funding AgencyGrant Number
NASA80NSSC20K0624
Caltech WAVE FellowshipUNSPECIFIED
Subject Keywords:High contrast imaging, Exoplanets, Coronagraphs
Series Name:Proceedings of SPIE
Issue or Number:11823
DOI:10.1117/12.2594871
Record Number:CaltechAUTHORS:20211018-185302996
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20211018-185302996
Official Citation: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
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:111530
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:15 Nov 2021 20:41
Last Modified:26 Apr 2022 16:51

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