MarTec Photonics is a spinoff of the Institut für Strahlwerkzeuge (IFSW) at the University of Stuttgart, Germany, and founded via the technology transfer program of the TTI GmbH. We bundle the knowledge gathered over more than 15 years in the development of specialty optics, mostly based on resonant grating-waveguide-structures (GWS). These offer unique possibilities in high-power laser applications, either for intra-cavity or extra-cavity use.