Adaptive optics with an infrared Pyramid wavefront sensor
- Creators
- Bond, Charlotte Z.
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Wizinowich, Peter
- Chun, Mark
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Mawet, Dimitri
- Lilley, Scott
- Cetre, Sylvain
- Jovanovic, Nemanja
- Delorme, Jacques-Robert
- Wetherell, Edward
- Jacobson, Shane
- Lockhart, Charles
- Warmbier, Eric
- Wallace, James K.
- Hall, Donald N.
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Goebel, Sean
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Guyon, Olivier
- Plantet, Cedric
- Agapito, Guido
- Giordano, Christophe
- Esposito, Simone
- Femenía-Castella, Bruno
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.
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.Attached Files
Published - 107031Z.pdf
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Additional details
- Eprint ID
- 98184
- Resolver ID
- CaltechAUTHORS:20190823-134013491
- NSF
- AST-1611623
- NSF
- AST-1106391
- Heising-Simons Foundation
- W. M. Keck Foundation
- Created
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2019-08-23Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field
- Caltech groups
- Astronomy Department
- Series Name
- Proceedings of SPIE
- Series Volume or Issue Number
- 10703