17 July 2018 Keck II adaptive optics upgrade: simulations of the near-infrared pyramid sensor
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A future upgrade of the Keck II telescope’s adaptive optics system will include a near-infrared pyramid wavefront sensor. It will benefit from low-noise infrared detector technology, specifically the avalanche photodiode array SAPHIRA (Leonardo). The system will either operate with a natural guide star in a single conjugated adaptive optics system, or using a laser guide star (LGS), with the pyramid working as a low-order sensor. We present a study of the pyramid sensor’s performance via end-to-end simulations, including an analysis of calibration strategies. For LGS operation, we compare the pyramid to LIFT, a focal-plane sensor dedicated to low-order sensing.
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Cedric Plantet, Charlotte Z. Bond, Christophe Giordano, Guido Agapito, Mojtaba Taheri, Simone Esposito, and Peter Wizinowich "Keck II adaptive optics upgrade: simulations of the near-infrared pyramid sensor", Proc. SPIE 10703, Adaptive Optics Systems VI, 1070335 (17 July 2018); doi: 10.1117/12.2313190; https://doi.org/10.1117/12.2313190

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