Stable Polarization Entanglement based Quantum Key Distribution over Metropolitan Fibre Network
yicheng shi, Soe Moe Thar, Hou Shun Poh, James A. Grieve, Christian Kurtsiefer, Alexander Ling · Conference on Lasers and Electro-Optics · 2020
Quantum key distribution with O-band polarization-entangled photons over deployed telecom fiber network is demonstrated. Liquid-crystal retarders are used to compensate for fiber birefringence induced errors and ensure stable operation.