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

机译：QKD系统设计远程空中纤维极化波动分析

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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：偏振波动引起的偏振基未对准是在鸟纤维中偏振编码量子密钥分布（QKD）的部署中的主要限制因素。在这项研究中，我们从QKD的角度下进一步了解鸟纤维中的极化波动研究。我们提出了一种评估鸟纤维中极化波动的方法。导出将量子比特错误率（QBET）连接到Stokes向量的组件的关系。通过现场实验，获得了68公里长的空中纤维中的极化波动的长期数据。进行了对对应于偏振未对准引起的典型QBET的时间成本的统计分析。结果可用于评估偏振补偿所需速度，并且表示极化补偿模块的时间成本应该理所当然地低于1ms。这可以为基于长途亚航纤维的偏振编码QKD系统的偏振补偿模块和算法的设计提供指导，从而实现其部署。

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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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