10 July 2018 Adaptive optics with an infrared pyramid wavefront sensor
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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.
Conference Presentation
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Charlotte Z. Bond, Charlotte Z. Bond, Peter Wizinowich, Peter Wizinowich, Mark Chun, Mark Chun, Dimitri Mawet, Dimitri Mawet, Scott Lilley, Scott Lilley, Sylvain Cetre, Sylvain Cetre, Nemanja Jovanovic, Nemanja Jovanovic, Jacques-Robert Delorme, Jacques-Robert Delorme, Edward Wetherell, Edward Wetherell, Shane Jacobson, Shane Jacobson, Charles Lockhart, Charles Lockhart, Eric Warmbier, Eric Warmbier, James K. Wallace, James K. Wallace, Donald N. Hall, Donald N. Hall, Sean Goebel, Sean Goebel, Olivier Guyon, Olivier Guyon, Cedric Plantet, Cedric Plantet, Guido Agapito, Guido Agapito, Christophe Giordano, Christophe Giordano, Simone Esposito, Simone Esposito, Bruno Femenia-Castella, Bruno Femenia-Castella, } "Adaptive optics with an infrared pyramid wavefront sensor", Proc. SPIE 10703, Adaptive Optics Systems VI, 107031Z (10 July 2018); doi: 10.1117/12.2314121; https://doi.org/10.1117/12.2314121
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