1 September 2017 Shaped pupil coronagraphy for WFIRST: high-contrast broadband testbed demonstration
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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.
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Eric Cady, Eric Cady, Kunjithapatham Balasubramanian, Kunjithapatham Balasubramanian, Jessica Gersh-Range, Jessica Gersh-Range, Jeremy Kasdin, Jeremy Kasdin, Brian Kern, Brian Kern, Raymond Lam, Raymond Lam, Camilo Mejia Prada, Camilo Mejia Prada, Dwight Moody, Dwight Moody, Keith Patterson, Keith Patterson, Ilya Poberezhskiy, Ilya Poberezhskiy, A. J. Eldorado Riggs, A. J. Eldorado Riggs, Byoung-Joon Seo, Byoung-Joon Seo, Fang Shi, Fang Shi, Hong Tang, Hong Tang, John Trauger, John Trauger, Hanying Zhou, Hanying Zhou, Neil Zimmerman, Neil Zimmerman, } "Shaped pupil coronagraphy for WFIRST: high-contrast broadband testbed demonstration", Proc. SPIE 10400, Techniques and Instrumentation for Detection of Exoplanets VIII, 104000E (1 September 2017); doi: 10.1117/12.2272834; https://doi.org/10.1117/12.2272834
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