QKD Network Coexistence Datasets with Standardised Performance Metrics and Experimental Methods

This dataset was developed as part of Deliverable D4.2, "Coexistence Datasets with Standardised Performance Metrics and Methods for Quantum Key Distribution Networks Experimental Measurements", and is intended for open-access dissemination and reuse by the research community. This project has received funding from the European Union’s DIGITAL Europe Programme under grant agreement No. 101091520

This dataset contains experimental coexistence measurements collected using a Toshiba Quantum Key Distribution (QKD) system under controlled laboratory conditions. The dataset was generated through systematic attenuation sweeps performed across multiple fibre-length configurations (0 km and 50 km) and coexistence scenarios involving the presence or absence of an externally injected optical signal.

The dataset provides standardised performance metrics for evaluating QKD coexistence behaviour, including Quantum Bit Error Rate (QBER) and Secure Key Rate (SKR), together with contextual parameters such as optical attenuation settings and transmission distance.

Experimental data have been cleaned, curated, and organised into structured CSV files containing measurement-level records and JSON files containing descriptive statistics and summary information. The dataset is accompanied by documentation describing the experimental methodology, data structure, variables, and processing procedures.

The dataset supports reproducible research, benchmarking of QKD coexistence performance, comparative analysis across deployment scenarios, and future studies on the integration of QKD systems into optical communication networks.

Contents:

• Measurement-level datasets (CSV)
• Summary statistics and metadata (JSON)
• Documentation and usage guidelines (README)

Key Variables:

• Quantum Bit Error Rate (QBER)
• Secure Key Rate (SKR)
• Optical attenuation (VOA settings)
• Fibre length (0 km and 50 km)
• External signal injection status (On/Off)

Keywords: Quantum Key Distribution (QKD), Coexistence, Quantum Communications, QBER, Secure Key Rate, Optical Networks, Network Performance, Experimental Dataset, Benchmarking, Fibre Optic Communications.