Fast linearized coronagraph optimizer (FALCO) III: optimization of key coronagraph design parameters

Deformable mirrors(DMs) are increasingly becoming part of nominal coronagraphdesigns, such as the hybrid Lyot coronagraph, in addition to their role counteracting optical aberrations. Previous studies have investigated the effects of the inter-DM Fresnel numberon achievable contrast, throughput, and tip/tilt sensitivity for apodized coronagraphsaugmented with DMs to suppress diffraction from struts and segment gaps. In this paper, we build upon that previous work by directly suppressing tip/tilt sensitivity with the controller, both for coronagraphswith and without apodizers. We also explore the effects of other important design parameters such as actuator density and tip/tilt controller weighting on performance. These comprehensive coronagraphdesign studies are enabled by the Fast Linearized CoronagraphOptimizer (FALCO) software toolbox, which provides rapid re-calculation of the DM response matrix for a variety of coronagraphs.