Since the foundation of our institute, lasers have been a central topic of research. After the investigation of various gas laser concepts, fiber lasers are in the focus since several years. In our lab we are also able to write specific fiber Bragg gratings for use in fiber lasers. Raman fiber lasers with potential medical applications in have been successfully demonstrated, including very short cavity fiber lasers. Ultra-short pulse fiber lasers with flexible pulse characteristic design are studied to enable innovative applications in material processing. One focus is to provide a pulse laser system with high flexibility with respect to materials and processes. Based on elaborated numerical simulations and experimental work we perform this research in close cooperation with industrial partners.