We are pleased to share a recent publication by the Allegro EU Project team:
P. Mehdizadeh, M. R. Dibaj, H. Beyranvand, and F. Arpanaei,
“Quantum-Classical Coexistence in Multi-Band Optical Networks: A Noise Analysis of QKD,” IEEE Communications Letters, vol. 28, no. 3, pp. 488–492, March 2024.
🔗 Read the paper here: https://doi.org/10.1109/LCOMM.2024.3356165
Key Insights:
- A thorough noise-impact evaluation for integrating Quantum Key Distribution (QKD) and classical channels over shared fiber spans.
- Demonstrates that limiting quantum signals to the extended C-band while relegating classical data to L-band confines QKD range to under 13 km.
- Proposes a superior approach: dedicating lower bands (O, E, S) for quantum channels and combining classical traffic across C+L bands—this configuration achieves secure key distribution up to 70 km, with 1381 nm offering the best key rate (~3.08 Mbit/s).
This work advances our understanding of practical, scalable QKD deployment alongside existing classical optical infrastructure—supporting the Allegro EU Project’s mission for secure, integrated photonic networks.