  The SINFONI instrument for ESO's VLT combines integral field spectroscopy and
adaptive optics (AO). We discuss detailed simulations of the adaptive optics
module. These simulations are aimed at assessing the AO module performance,
specifically for operations with extended sources and a laser guide star.
Simulated point spread function (PSF) images will be used to support scientific
preparations and the development of an exposure time calculator, while
simulated wavefront sensor measurements will be used to study PSF
reconstruction methods. We explain how the adaptive optics simulations work,
focusing on the realistic modelling of the laser guide star for a curvature
wavefront sensor. The predicted performance of the AO module is discussed,
resulting in recommendations for the operation of the SINFONI AO module at the
telescope.
