@inproceedings{ffb3b58489ff480e8289e64b3c89e4fa,
title = "Adaptive optics with an infrared pyramid wavefront sensor",
abstract = "Wavefront sensing in the infrared is highly desirable for the study of M-type stars and cool red objects, as they are sufficiently bright in the infrared to be used as the adaptive optics guide star. This aids in high contrast imaging, particularly for low mass stars where the star-to-planet brightness ratio is reduced. Here we discuss the combination of infrared detector technology with the highly sensitive Pyramid wavefront sensor (WFS) for a new generation of systems. Such sensors can extend the capabilities of current telescopes and meet the requirements for future instruments, such as those proposed for the giant segmented mirror telescopes. Here we introduce the infrared Pyramid WFS and discuss the advantages and challenges of this sensor. We present a new infrared Pyramid WFS for Keck, a key sub-system of the Keck Planet Imager and Characterizer (KPIC). The design, integration and testing is reported on, with a focus on the characterization of the SAPHIRA detector used to provide the H-band wavefront sensing. Initial results demonstrate a required effective read noise <1e- at high gain.",
keywords = "Pyramid wavefront sensor, Wavefront sensing, adaptive optics, infrared",
author = "Bond, {Charlotte Z.} and Peter Wizinowich and Mark Chun and Dimitri Mawet and Scott Lilley and Sylvain Cetre and Nemanja Jovanovic and Delorme, {Jacques Robert} and Edward Wetherell and Shane Jacobson and Charles Lockhart and Eric Warmbier and Wallace, {James K.} and Hall, {Donald N.} and Sean Goebel and Olivier Guyon and Cedric Plantet and Guido Agapito and Christophe Giordano and Simone Esposito and Bruno Femenia-Castella",
note = "Funding Information: The near-infrared pyramid wavefront sensor is supported by the National Science Foundation under Grant No. AST-1611623. The camera used with the pyramid wavefront sensor is provided by Don Hall with support by the National Science Foundation under Grant No. AST-1106391. The fiber injection unit is supported by the Heising-Simons Foundation. Funding Information: The W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. Publisher Copyright: {\textcopyright} 2018 SPIE.; Adaptive Optics Systems VI 2018 ; Conference date: 10-06-2018 Through 15-06-2018",
year = "2018",
doi = "10.1117/12.2314121",
language = "English (US)",
isbn = "9781510619593",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Dirk Schmidt and Laura Schreiber and Close, {Laird M.}",
booktitle = "Adaptive Optics Systems VI",
}