Numerical simulations of an Extreme AO system for an ELT

Authors

R. Clare, M. Le Louarn

Affiliations

ESO, ESO

Abstract

We present the first full end to end numerical simulation results for a 200x200 sub-aperture modulated Pyramid WFS-based extreme AO, on a 42m telescope. The Pyramid wavefront sensor with modulation is used to reduce the effects of noise propagation (like aliasing and photon-noise). We present performance (Strehl and an estimate of contrast) as a function of system parameters like modulation, guide star magnitude and to explore the sensitivity of the system to for example loop gain and atmospheric turbulence profiles.


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