CaltechAUTHORS
  A Caltech Library Service

Experimental analysis of the achromatic performance of a vector vortex coronagraph

Ruane, Garreth and Serabyn, Eugene and Mejia Prada, Camilo and Baxter, Wesley and Bendek, Eduardo and Mawet, Dimitri and Riggs, A. J. Eldorado (2020) Experimental analysis of the achromatic performance of a vector vortex coronagraph. In: Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave. Proceedings of SPIE. No.11443. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 114432O. ISBN 9781510636736. https://resolver.caltech.edu/CaltechAUTHORS:20210108-145720027

[img] PDF - Published Version
See Usage Policy.

3215Kb
[img] PDF - Submitted Version
See Usage Policy.

3195Kb

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20210108-145720027

Abstract

The vector vortex coronagraph is an instrument designed for direct detection and spectroscopy of exoplanets over a broad spectral range. Our team is working towards demonstrating contrast performance commensurate with imaging temperate, terrestrial planets orbiting solar-type stars using the High Contrast Imaging Testbed facility at NASA's Jet Propulsion Laboratory. To date, the best broadband performance achieved is ~10⁻⁸ raw contrast over a bandwidth of Δλ/λ=10% in the visible regime (central wavelengths of 550 nm-750 nm), while monochromatic tests yield much deeper contrast (~10⁻⁹ or better). In this study, we analyze the main performance limitations on the testbeds so far, focusing on the quality of the focal plane mask manufacturing. We measure the polarization properties of the masks and the residual electric field in the dark hole as a function of wavelength. Our results suggest that the current performance is limited by localized defects in the in the focal plane masks. A new generation of masks is under test that have fewer defects and promise performance improvements.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.2561593DOIArticle
https://arxiv.org/abs/2012.07728arXivDiscussion Paper
ORCID:
AuthorORCID
Ruane, Garreth0000-0003-4769-1665
Bendek, Eduardo0000-0002-9408-8925
Mawet, Dimitri0000-0002-8895-4735
Riggs, A. J. Eldorado0000-0002-0863-6228
Additional Information:© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). This work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA).
Group:Astronomy Department
Funders:
Funding AgencyGrant Number
NASA/JPL/CaltechUNSPECIFIED
Subject Keywords:High contrast imaging, exoplanets, coronagraphs
Series Name:Proceedings of SPIE
Issue or Number:11443
Record Number:CaltechAUTHORS:20210108-145720027
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20210108-145720027
Official Citation:Garreth Ruane, Eugene Serabyn, Camilo Mejia Prada, Wesley Baxter, Eduardo Bendek, Dimitri Mawet, and A. J. Eldorado Riggs "Experimental analysis of the achromatic performance of a vector vortex coronagraph", Proc. SPIE 11443, Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave, 114432O (13 December 2020); https://doi.org/10.1117/12.2561593
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107385
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:09 Jan 2021 01:19
Last Modified:09 Jan 2021 01:19

Repository Staff Only: item control page