A simple system of polarization compensation

Liandong Chen; Lifang Gao; Qianqian Zhang; Xiaopeng Xin; Wei Zhu

doi:10.1117/12.3031182

19 July 2024 A simple system of polarization compensation

Liandong Chen, Lifang Gao, Qianqian Zhang, Xiaopeng Xin, Wei Zhu

Proceedings Volume 13181, Third International Conference on Electronic Information Engineering, Big Data, and Computer Technology (EIBDCT 2024); 1318169 (2024) https://doi.org/10.1117/12.3031182
Event: Third International Conference on Electronic Information Engineering, Big Data, and Computer Technology (EIBDCT 2024), 2024, Beijing, China

Abstract

The polarization-encoded quantum key distribution system uses the polarization property of photons to realize secure key sharing. For fiber-based systems, however, the birefringence effect in single-mode fibers significantly affects the preservation of photon polarization states. Therefore, it is essential to carry out polarization compensation for polarization coding system. The current mainstream polarization compensation systems utilize Field Programmable Gate Array for data acquisition, calculation, and control. This method offers rapid and efficient performance but comes with high costs and complex designs. To address this problem, a polarization compensation system based on hardware equipment is proposed in this paper. The system not only reduces the cost of polarization compensation, but also is simple and easy to operate by using computer for data processing. To further demonstrate the feasibility of the system, a polarization compensation procedure based on a gradient algorithm is designed, with the error count rate of a single-photon detector serving as an evaluation parameter. In addition, this algorithm is applied to the aforementioned system for long-term and long-distance polarization monitoring. Over a period of approximately 24 hours, the average error count rate for a 20km transmission fiber is 0.59% and the average error rate for a 50km transmission fiber is 0.55%. These experimental results demonstrate that the system exhibits good polarization compensation performance and long running ability.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Liandong Chen, Lifang Gao, Qianqian Zhang, Xiaopeng Xin, and Wei Zhu "A simple system of polarization compensation", Proc. SPIE 13181, Third International Conference on Electronic Information Engineering, Big Data, and Computer Technology (EIBDCT 2024), 1318169 (19 July 2024); https://doi.org/10.1117/12.3031182

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KEYWORDS

Polarization

Quantum systems

Single photon detectors

Quantum key distribution

Control systems

Polarization control

Quantum signals

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