Adaptive optics with an infrared pyramid wavefront sensor

Date Issued
2018
Author(s)
Bond, Charlotte Z.
•
Wizinowich, Peter
•
Chun, Mark
•
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.
•
Goebel, Sean
•
Guyon, Olivier
•
•
•
Giordano, Christophe
•
•
Femenia-Castella, Bruno
DOI
10.1117/12.2314121
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.
Coverage
Adaptive Optics Systems VI
All editors
Close, Laird M.; Schreiber, Laura; Schmidt, Dirk
Series
Volume
10703
Start page
107031Z
Conferenece
Adaptive Optics Systems VI
Conferenece place
Austin, Texas, United States
Conferenece date
10-15 June, 2018
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