Photonic and Quantum Communication Technologies for Optical Networks Evolution.

The role of photonic technologies and optical communications, as well as quantum communications, is particularly relevant to address the societal challenges posed by 6G networks and for a sustainable network evolution. This work focuses on recent advances in programmable multi-dimensional (spectrally and spatially multiplexed) transmission systems and adaptive high-capacity (multi-Tb/s) photonic transceivers to address a sustainable capacity scaling and the needs of future optical networks. It presents our approach and proposed solutions, and discusses how to enable high-performance, flexibility, agility, cost/power efficiency and security, promoting an optimal resource usage. To address security aspects, quantum key distribution (QKD) technology is considered in coexistence with classical/conventional systems.