Prof. Karsch is a group leader of “High Field Lasers and Applications Group (HiFLAG)”. His group works on high-power laser development, electron and X-ray sources, as well as applications of these sources. Prof. Stefan Karsch's "High Field Lasers and Applications Group (HiFLAG)" encompasses three major research directions: 1. Operation and development of high-power laser systems. 2. Laser-driven electron acceleration. 3. Laser-driven X-ray sources and their applications.