Analysis of Single Photon Detectors in Differential Phase Shift Quantum Key Distribution

TL;DR

This paper analyzes the performance of single photon detectors in differential phase shift quantum key distribution, comparing InGaAs/InP and Silicon-APD detectors, and finds Silicon-APD outperforms InGaAs/InP in key parameters.

Contribution

It provides a comparative analysis of detector performance in differential phase shift QKD, highlighting the advantages of Silicon-APD at telecommunication wavelengths.

Findings

Silicon-APD outperforms InGaAs/InP APD in key rate and secure communication distance.

Frequency conversion enhances Silicon-APD performance at telecommunication wavelengths.

The study offers insights into optimizing detector choice for fiber-based quantum key distribution.

Abstract

In the current research work, an analysis of differential phase shift quantum key distribution using InGaAs/InP and Silicon-APD (avalanche photodiode) as single photon detectors is performed. Various performance parameters of interest such as shifted key rate, secure key rate, and secure communication distance obtained are investigated. In this optical fiber-based differential phase shift quantum key distribution, it is observed that Si-APD under frequency conversion method at telecommunication window outperforms the InGaAs/InP APD.