Stable Polarization Entanglement based Quantum Key Distribution over Metropolitan Fibre network
ORAL
Abstract
We demonstrate a Quantum key distribution (QKD) system implemented with polarisation-entangled photons over telecom fibre network. The photon pairs are generated at telecom O-band with one side propagating through 10 km of deployed fibre. Drift of polarisation state over fibre is compensated using liquid crystal variable retarders to minimize the Quantum Bit Error Rate (QBER). This ensures stable, continuous QKD operation with an average QBER of 6.4% and a final key rate of 109 bits/s.
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Presenters
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yicheng shi
Centre for Quantum Technologies, National University of Singapore
Authors
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yicheng shi
Centre for Quantum Technologies, National University of Singapore
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Moe Thar Soe
Centre for Quantum Technologies, National University of Singapore
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Hou Shun Poh
Centre for Quantum Technologies, National University of Singapore
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James Anthony Grieve
Centre for Quantum Technologies, National University of Singapore
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Christian Kurtsiefer
Centre for Quantum Technologies, National University of Singapore
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Alexander Ling
Centre for Quantum Technologies, Centre for Quantum Technologies, National University of Singapore