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Coronagraphic instruments provide a great chance of enabling high contrastspectroscopy for the pursuit of finding a habitable world. Future spacetelescope coronagraph instruments require high performing focal plane masks incombination with precise wavefront sensing and control techniques to achievedark holes for planet detection. Several wavefront control algorithms have beendeveloped in recent years that might vary in performance depending on thecoronagraph they are paired with. This study compares 3 model-free andmodel-based algorithms when coupled with either a Vector (VVC) or a Scalar(SVC) Vortex Coronagraph mask in the same laboratory conditions: PairwiseProbing with Electric Field Conjugation, the Self-Coherent Camera with ElectricField Conjugation, and Implicit Electric Field Conjugation. We presentexperimental results from the In-Air Coronagraph Testbed (IACT) at JPL innarrowband and broadband light, comparing the pros and cons of each of thesewavefront sensing and control algorithms with respect to their potential forfuture space telescopes.

Experimental comparison of model-free and model-based dark hole algorithms for future space telescopes