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 | |||||||||
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| 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 | |||||||||
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| 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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