This team has been studying, developing and using for many years coherent sources of XUV radiation, also called extreme ultra-violet (EUV). The spectral range of sources generated by the group typically extends from 1 to 50 nm with studies in collaboration with the ILM group for the range extending above 50 nm. We are working on two types of XUV sources namely the generation of high order harmonics (HHG) and XUV lasers which are most often injected by HHGs. The understanding of the physical phenomena linked to the generation of these sources as well as their use under optimal conditions, we pushed to develop in parallel an activity in metrology and XUV optics. Finally, we regularly carry out application experiments with external users, which push us to always improve our XUV sources.