非理想情况下的实时偏振控制算法

张启业; 朱勇; 苏洋; 王德双; 杨龙

doi:doi:10.3788/lop50.090604

激光与光电子学进展, 2013, 50 (9): 090604, 网络出版: 2013-08-21

非理想情况下的实时偏振控制算法

Real-Time Polarization Control Algorithm under Non-Ideal Situation

论文大纲

张启业 ^*朱勇苏洋王德双杨龙

作者单位

解放军理工大学通信工程学院, 江苏南京 21007

摘要

在基于偏振编码的BB84协议的量子密钥分发(QKD)系统中，偏振控制系统是关键的一个环节。为了能够高效快速地恢复并稳定因光纤链路抖动以及环境温度变化等因素而受损的偏振态，分析了电动偏振控制器（EPC）的性能，引入了旋转矩阵作为偏振控制器的Müller矩阵，提出了规避盲区的策略，设计了非理想情况下的实时偏振控制算法。该算法在局部控制过程中只使用两个控制自由度即可完成期望输出的偏振态，极大地提高了控制速度。仿真结果验证了算法的可行性。

Abstract

In the receiving end of quantum key distribution (QKD) system based on the polarization encoded BB84 protocol, the polarization control system is very key to QKD. In order to recover and stabilize very efficiently the damaged polarization states owing to these factors including the optical fiber, environment temperature and so on, the performance of the electric polarization controller (EPC) is analyzed and rotation matrix is introduced as the Müeller matrix of the EPC. A strategy of avoiding the blind zone is put forward and the real-time polarization control algorithm is designed in the non-ideal situation. The algorithm shows that every control process uses only two degrees of freedom to transform all possible polarization states and can improve greatly the rate of the controlling. Simulation results show that this algorithm is feasible.

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张启业, 朱勇, 苏洋, 王德双, 杨龙. 非理想情况下的实时偏振控制算法[J]. 激光与光电子学进展, 2013, 50(9): 090604. Zhang Qiye, Zhu Yong, Su Yang, Wang Deshuang, Yang Long. Real-Time Polarization Control Algorithm under Non-Ideal Situation[J]. Laser & Optoelectronics Progress, 2013, 50(9): 090604.

非理想情况下的实时偏振控制算法

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