Properties unique to microstructured optical fibers are essential to enabling future quantum technologies from communications to security to precision measurement.
High-speed and large-capacity optical fiber communication plays an important role in power system communication.With the development of optical fiber communication network tapping technology,optical fiber communication security faces new challenges.This paper analyzes the vulnerability of optical fiber communication network,introduces the fiber quantum key distribution technology,and summarizes the features of three QKD networks.Finally,the paper proposes the prospect of fiber QKD in power system and future research directions.
Quantum key distribution (QKD) exploits the unique properties of quantum physics. It has evolved tremendously in recent years, attracting considerable attention as a privileged solution capable of enabling future-proof secure communication systems. This contrasts with classical cryptographic systems, whose security is based on computational security. However, before quantum cryptographic systems, e.g. QKD, could be widely implemented, in a coexistence scenario with classical signals, and made widely available to applications and users, they face several crucial challenges related to their real-world implementation. This paper presents our recent investigations to evaluate the coexistence between classical and quantum signals in hybrid fiber (multi-core fiber) and free-space optical links for an optimized integration of QKD systems in the installed fiber communication networks. We present results in terms of spontaneous Raman scattering, inter-core cross-talk and turbulence-induced optical power fluctuations.
In this paper, we mainly explore the application of fiber Quantum Key Distribution (QKD) technology in Smart Grid. First, the vulnerability of optical fiber communication networks is analyzed. Second, an overview of fiber quantum key distribution technology is given. Third, typical fiber QKD use cases in Smart Grid are proposed. Finally, future research directions of fiber QKD for power systems are discussed. Compared to other classical cryptography technology, the application of fiber QKD in Smart Grid has unique advantages.