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Adaptive optics with an infrared Pyramid wavefront sensor

Bond, Charlotte Z. and Wizinowich, Peter and Chun, Mark and Mawet, Dimitri and Lilley, Scott and Cetre, Sylvain and Jovanovic, Nemanja and Delorme, Jacques-Robert and Wetherell, Edward and Jacobson, Shane and Lockhart, Charles and Warmbier, Eric and Wallace, James K. and Hall, Donald N. and Goebel, Sean and Guyon, Olivier and Plantet, Cedric and Agapito, Guido and Giordano, Christophe and Esposito, Simone and Femenía-Castella, Bruno (2018) Adaptive optics with an infrared Pyramid wavefront sensor. In: Adaptive Optics Systems VI. Proceedings of SPIE. No.10703. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 107031Z. ISBN 9781510619593.

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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.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Wizinowich, Peter0000-0002-1646-442X
Mawet, Dimitri0000-0002-8895-4735
Goebel, Sean0000-0003-3763-2418
Guyon, Olivier0000-0002-1097-9908
Additional Information:© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). 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. 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. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.
Group:Astronomy Department
Funding AgencyGrant Number
Heising-Simons FoundationUNSPECIFIED
W. M. Keck FoundationUNSPECIFIED
Subject Keywords:Wavefront sensing, adaptive optics, Pyramid wavefront sensor, infrared
Series Name:Proceedings of SPIE
Issue or Number:10703
Record Number:CaltechAUTHORS:20190823-134013491
Persistent URL:
Official Citation:Charlotte Z. Bond, Peter Wizinowich, Mark Chun, Dimitri Mawet, Scott Lilley, Sylvain Cetre, Nemanja Jovanovic, Jacques-Robert Delorme, Edward Wetherell, Shane Jacobson, Charles Lockhart, Eric Warmbier, James K. Wallace, Donald N. Hall, Sean Goebel, Olivier Guyon, Cedric Plantet, Guido Agapito, Christophe Giordano, Simone Esposito, and Bruno Femenia-Castella "Adaptive optics with an infrared pyramid wavefront sensor", Proc. SPIE 10703, Adaptive Optics Systems VI, 107031Z (10 July 2018);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98184
Deposited By: George Porter
Deposited On:23 Aug 2019 22:16
Last Modified:16 Nov 2021 17:37

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