Modeling and analysis of XAO systems: application to VLT-Planet Finder

A end-to-end model of an Extreme Adaptive Optics system developed is the framework of the project VLT-PF is presented. The different components are exposed with their specificities. Several AO and XAO issues are discussed like scintillation, vibration and calibration effects among others. A full simulation of an XAO system coupled to a coronagraph and designed to detect faint companion in the vicinity of a bright star is shown.