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Communication Dans Un Congrès Année : 2023

Development of a non-linear curvature wavefront sensor for the Subaru Telescope's AO3k system

K Ahn
  • Fonction : Auteur
O Guyon
  • Fonction : Auteur
J Lozi
  • Fonction : Auteur
S Vievard
  • Fonction : Auteur
V Deo
  • Fonction : Auteur
J C Bragg
  • Fonction : Auteur

Résumé

A few years ago, we started upgrading AO188 into AO3k, including the real-time control system, laser guide star system, deformable mirror (DM), and wavefront sensors (WFSs). In this paper, we present the development of a non-linear curvature WFS (nlCWFS) as a new visible WFS for the upgraded AO3k system. We also introduce the optical and optomechanical design of the nlCWFS. The nlCWFS has two new features: one is the dual-stroke linear mode, and the other one is to deploy non-linear wavefront reconstruction. The dual-stroke linear mode provides a good sensitivity for both low-and high-order aberrations. Also, the non-linear wavefront reconstruction provides a large dynamic range. By combining the linear and non-linear methods, the nlCWFS takes both advantages. Finally, we present laboratory demonstration results of closed-loop experiments in the lab with linear and non-linear wavefront reconstruction algorithms.
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Dates et versions

hal-04429016 , version 1 (31-01-2024)

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K Ahn, O Guyon, J Lozi, S Vievard, V Deo, et al.. Development of a non-linear curvature wavefront sensor for the Subaru Telescope's AO3k system. Adaptive Optics for Extremely Large Telescopes 7th Edition, Jun 2023, Avignon, France. ⟨10.13009/AO4ELT7-2023-075⟩. ⟨hal-04429016⟩
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