The research group is dedicated to advancing fundamental and applied research in the areas of quantum communication and quantum sensing using free space channels. The main focus is on polarization and phase-amplitude-encoded continuous-variable quantum key distribution (CV-QKD) for link scenarios including building-to-building communication within urban environments and ground-to-flying sender configurations. The experimental research includes the development of key components like sender and receiver systems at 800 nm and 1550 nm that exploit coherent and squeezed light sources. It also involves the development of dedicated telescopes that maintain the integrity of transmitted quantum information. A key area of the group’s research is the development of versatile systems capable of deploying wavelength and protocol multiplexing, as well as parallel classical and quantum channels. This approach significantly enhances the capacity and flexibility of communication systems, paving the way for more efficient, scalable networks and advanced protocols.