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Proceedings Paper

First light of the High Contrast Integral Field Spectrograph (HCIFS)
Author(s): Christian Delacroix; He Sun; Michael Galvin; Mary Anne Limbach; Tyler Groff; Maxime Rizzo; Matthew Grossman; Katherine Mumm; N. Jeremy Kasdin
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Paper Abstract

Future space-based observatories such as WFIRST will be equipped with high contrast imaging instruments designed to study extrasolar planets and disks in the absence of atmospheric perturbations. One of the most efficient techniques to achieve this goal is the combination of wavefront control and broadband coronagraphy. Being able to achieve a high contrast over a wide spectral bandwidth allows us to characterize the chemical composition of exoplanet atmospheres using an integral field spectrograph (IFS). In this paper, we report on the development of such an IFS for the High Contrast Imaging Lab (HCIL) at Princeton University, downstream of a Shaped Pupil coronagraph. Our final lensletbased design calls for the light in an 18% band around 660 nm to be dispersed with a spectral resolution of 50. We also present our new laboratory control software written in Python, allowing the import of open-source packages such as CRISPY to ultimately reconstruct 3D datacubes from IFS spatio-spectral science images. Finally, we show and discuss our preliminary first light results, reaching a contrast of ~10-5 using in-house focal-plane wavefront control and estimation algorithms with two deformable mirrors.

Paper Details

Date Published: 27 July 2018
PDF: 8 pages
Proc. SPIE 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III, 107065L (27 July 2018); doi: 10.1117/12.2312773
Show Author Affiliations
Christian Delacroix, Princeton Univ. (United States)
He Sun, Princeton Univ. (United States)
Michael Galvin, Princeton Univ. (United States)
Mary Anne Limbach, Exoplanet Consulting (United States)
Tyler Groff, NASA Goddard Space Flight Ctr. (United States)
Maxime Rizzo, NASA Goddard Space Flight Ctr. (United States)
Matthew Grossman, Princeton Univ. (United States)
Katherine Mumm, Princeton Univ. (United States)
N. Jeremy Kasdin, Princeton Univ. (United States)

Published in SPIE Proceedings Vol. 10706:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III
Ramón Navarro; Roland Geyl, Editor(s)

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