QKD and QPSK integrated optical transmitters

Abstract

Secure communications of the future will need to implement Quantum Key Distribution systems in order to coop with the growing computational power of quantum computers. For mass adoption of these systems we will need to integrate different optical components into small chips. In this work we present the design and experimental verification of photonic integrated circuits able to, not only implement Quantum key distribution protocols, but also classical coherent communications. The possibility of using these designs for either type of communication with state-of-the-art performances makes them ideal for future mass adoption.