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Proceedings Paper

The high-contrast spectroscopy testbed for segmented telescopes (HCST): new wavefront control demonstrations
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Paper Abstract

The High-Contrast Spectroscopy Testbed for Segmented Telescopes (HCST) in the Exoplanet Technology Laboratory (ET Lab) at Caltech is designed to test the technologies that will enable direct imaging and characterization of exoplanets with future segmented ground- and space-based telescopes. Wavefront sensing and control has been successfully implemented with electric field conjugation (EFC) using the FALCO Matlab package, yielding a baseline raw contrast of 1×10-8 in narrowband light with a Vector Vortex Coronagraph over a clear aperture. Here we report on progress towards our next HCST milestones: 1- Demonstration of 10-8 raw contrast levels in broadband light with the apodized vortex coronagraph using a LUVOIR B-like segmented aperture. 2- Integration of a fiber injection unit (FIU) and corresponding wavefront control algorithm to achieve 10-8 raw contrast in broadband light through a single mode fiber enabling high dispersion coronagraphy.

Paper Details

Date Published: 9 September 2019
PDF: 10 pages
Proc. SPIE 11117, Techniques and Instrumentation for Detection of Exoplanets IX, 111171W (9 September 2019); doi: 10.1117/12.2530670
Show Author Affiliations
Jorge Llop-Sayson, Caltech (United States)
Garreth Ruane, Jet Propulsion Lab. (United States)
Caltech (United States)
Nemanja Jovanovic, Caltech (United States)
Dimitri Mawet, Caltech (United States)
Jet Propulsion Lab. (United States)
Daniel Echeverri, Caltech (United States)
A.J. Eldorado Riggs, Jet Propulsion Lab. (United States)
Carl T. Coker, Jet Propulsion Lab. (United States)
Grady Morrissey, Caltech (United States)
He Sun, Princeton Univ. (United States)

Published in SPIE Proceedings Vol. 11117:
Techniques and Instrumentation for Detection of Exoplanets IX
Stuart B. Shaklan, Editor(s)

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