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Shaped pupil coronagraphy for WFIRST: high-contrast broadband testbed demonstration
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Paper Abstract

The Shaped Pupil Coronagraph (SPC) is one of the two operating modes of the WFIRST coronagraph instrument. The SPC provides starlight suppression in a pair of wedge-shaped regions over an 18% bandpass, and is well suited for spectroscopy of known exoplanets. To demonstrate this starlight suppression in the presence of expected onorbit input wavefront disturbances, we have recently built a dynamic testbed at JPL analogous to the WFIRST flight instrument architecture, with both Hybrid Lyot Coronagraph (HLC) and SPC architectures and a Low Order Wavefront Sensing and Control (LOWFS/C) subsystem to apply, sense, and correct dynamic wavefront disturbances. We present our best up-to-date results of the SPC mode demonstration from the testbed, in both static and dynamic conditions, along with model comparisons. HLC results will be reported separately.

Paper Details

Date Published: 1 September 2017
PDF: 15 pages
Proc. SPIE 10400, Techniques and Instrumentation for Detection of Exoplanets VIII, 104000E (1 September 2017); doi: 10.1117/12.2272834
Show Author Affiliations
Eric Cady, Jet Propulsion Lab. (United States)
Kunjithapatham Balasubramanian, Jet Propulsion Lab. (United States)
Jessica Gersh-Range, Princeton Univ. (United States)
Jeremy Kasdin, Princeton Univ. (United States)
Brian Kern, Jet Propulsion Lab. (United States)
Raymond Lam, Jet Propulsion Lab. (United States)
Camilo Mejia Prada, Jet Propulsion Lab. (United States)
Dwight Moody, Jet Propulsion Lab. (United States)
Keith Patterson, Jet Propulsion Lab. (United States)
Ilya Poberezhskiy, Jet Propulsion Lab. (United States)
A. J. Eldorado Riggs, Jet Propulsion Lab. (United States)
Byoung-Joon Seo, Jet Propulsion Lab. (United States)
Fang Shi, Jet Propulsion Lab. (United States)
Hong Tang, Jet Propulsion Lab. (United States)
John Trauger, Jet Propulsion Lab. (United States)
Hanying Zhou, Jet Propulsion Lab. (United States)
Neil Zimmerman, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 10400:
Techniques and Instrumentation for Detection of Exoplanets VIII
Stuart Shaklan, Editor(s)

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