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Analysis of polarization fluctuation in long-distance aerial fiber for QKD system design

机译：QKD系统设计中长距离空中光纤偏振起伏的分析

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摘要

The polarization basis misalignment caused by polarization fluctuation is the main limiting factor in the deployment of polarization-encoding quantum key distribution (QKD) in aerial fibers. In this study, we conduct further research on polarization fluctuations in aerial fibers from the perspective of QKD. We propose a method to evaluate polarization fluctuation in aerial fibers. The relation connecting the quantum bit error rate (QBER) to the components of the Stokes vector is derived. Through a field experiment, long-time data on the polarization fluctuations in a 68-km-long aerial fiber are obtained. A statistical analysis of the time-cost corresponding to a typical QBER caused by polarization misalignment is conducted. The results can be used to evaluate the required speed of polarization compensation, and they indicate that the time-cost of the polarization compensation module should ideally be lower than 1 ms. This can provide guidance for the design of polarization compensation modules and algorithms for polarization-encoding QKD systems based on long-distance aerial fibers, aiding in its deployment.
机译：由极化波动引起的极化基础失准是在空中光纤中部署极化编码量子密钥分布（QKD）的主要限制因素。在这项研究中，我们将从QKD的角度进一步研究空中光纤的极化波动。我们提出了一种评估空中光纤极化波动的方法。得出将量子误码率（QBER）与斯托克斯向量的分量相关联的关系。通过现场实验，获得了关于68公里长的空中光纤中极化波动的长期数据。对由偏振失准引起的典型QBER所花费的时间成本进行了统计分析。结果可用于评估所需的偏振补偿速度，并且这些结果表明，理想情况下，偏振补偿模块的时间成本应低于1 ms。这可以为基于长距离空中光纤的偏振编码QKD系统的偏振补偿模块和算法的设计提供指导，以帮助其部署。

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  • 来源
    《Optical fiber technology》 |2019年第3期|28-33|共6页
  • 作者

    Liu Rende; Yu Hao; Zan Jiye; Gao Song; Wang Liwei; Xu Mulan; Tao Jun; Liu Jianhong; Chen Qing; Zhao Yong;

  • 作者单位

    QuantumCTek Co Ltd, Hefei 230088, Anhui, Peoples R China;

    State Grid Anhui Informat & Telecommun Co, Hefei 230061, Anhui, Peoples R China;

    State Grid Anhui Informat & Telecommun Co, Hefei 230061, Anhui, Peoples R China;

    QuantumCTek Co Ltd, Hefei 230088, Anhui, Peoples R China;

    QuantumCTek Co Ltd, Hefei 230088, Anhui, Peoples R China;

    QuantumCTek Co Ltd, Hefei 230088, Anhui, Peoples R China;

    QuantumCTek Co Ltd, Hefei 230088, Anhui, Peoples R China;

    QuantumCTek Co Ltd, Hefei 230088, Anhui, Peoples R China;

    QuantumCTek Co Ltd, Hefei 230088, Anhui, Peoples R China;

    QuantumCTek Co Ltd, Hefei 230088, Anhui, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Quantum key distribution; Aerial fiber; Polarization;

    机译：量子密钥分布;空中纤维;极化;

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