Stable quantum key distribution with active polarization control based on time-division multiplexing

  title={Stable quantum key distribution with active polarization control based on time-division multiplexing},
  author={Jie Chen and Guang Wu and Lilin Xu and Xiaorong Gu and E. Wu and Heping Zeng},
  journal={New Journal of Physics},
Polarization-encoding provides a promising approach for the practical quantum key distribution (QKD) system due to the simple encoding and decoding method. Here we present a long-term stable polarization-encoding QKD with a real-time polarization control. The polarization of the signal photons in the optical fiber was maintained stable by using time-division-multiplexed reference pulses for feedback control. We implemented this technique in the QKD experiment in 50 km fiber to show that it… Expand
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