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6 October 2023 Demonstration of linear and neural net closed-loop control with a photonic lantern focal-plane wavefront sensor
Jonathan Lin, Barnaby Norris, Olivier Guyon, Michael Fitzgerald, Yinzi Xin, Yoo Jung Kim, Sébastien Vievard, Julien Lozi, Sergio Leon-Saval, Christopher Betters, Steph Sallum, Pradip Gatkine, Dimitri Mawet, Nemanja Jovanovic
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Proceedings Volume 12680, Techniques and Instrumentation for Detection of Exoplanets XI; 126800L (2023) https://doi.org/10.1117/12.2677057
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States
Abstract
Ground-based exoplanet science relies on the correction of aberrations induced by both atmosphere and instrument. However, current pupil-plane adaptive optics faces two major challenges: non-common-path aberrations and petaling modes. One solution is to add a wavefront sensor which operates in the focal plane, such as a photonic lantern (PL), a waveguide that efficiently couples aberrated light into single-mode fibers. We present a first experimental verification of real-time closed-loop control with the photonic lantern wavefront sensor (PLWFS), using a linear phase-retrieval algorithm, and on-sky demonstrations. We also discuss non-linear reconstruction using a neural network, and consider potentials for spectrally dispersed sensing.
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Jonathan Lin, Barnaby Norris, Olivier Guyon, Michael Fitzgerald, Yinzi Xin, Yoo Jung Kim, Sébastien Vievard, Julien Lozi, Sergio Leon-Saval, Christopher Betters, Steph Sallum, Pradip Gatkine, Dimitri Mawet, and Nemanja Jovanovic "Demonstration of linear and neural net closed-loop control with a photonic lantern focal-plane wavefront sensor", Proc. SPIE 12680, Techniques and Instrumentation for Detection of Exoplanets XI, 126800L (6 October 2023); https://doi.org/10.1117/12.2677057
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KEYWORDS
Pupil aberrations
Wavefront aberrations
Wavefront sensors
Adaptive optics
Neural networks
Equipment
Wavefront errors
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