A Quantum Key Distribution Network Through Single Mode Optical Fiber

TL;DR

This paper reports experimental results of quantum key distribution over 25 km optical fiber using an enhanced BB84 protocol, proposing a network design for large-scale secure quantum communication integration.

Contribution

It presents experimental data on QKD performance over fiber and introduces a network design for scalable quantum communication systems.

Findings

Raw key rate and QBER measured over 25 km fiber

Enhanced BB84 protocol implementation

Proposed scalable QKD network design

Abstract

Quantum key distribution (QKD) has been developed within the last decade that is provably secure against arbitrary computing power, and even against quantum computer attacks. Now there is a strong need of research to exploit this technology in the existing communication networks. In this paper we have presented various experimental results pertaining to QKD like Raw key rate and Quantum bit error rate (QBER). We found these results over 25 km single mode optical fiber. The experimental setup implemented the enhanced version of BB84 QKD protocol. Based upon the results obtained, we have presented a network design which can be implemented for the realization of large scale QKD networks. Furthermore, several new ideas are presented and discussed to integrate the QKD technique in the classical communication networks.