Analysis of polarization fluctuation in long-distance aerial fiber for QKD system design
| Autor: | Wang Liwei, Liu Jianhong, Xu Mulan, Gao Song, Liu Rende, Yong Zhao, Hao Yu, Tao Jun, Qing Chen, Jiye Zan |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Limiting factor business.industry 02 engineering and technology Quantum key distribution Polarization (waves) 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials 010309 optics symbols.namesake 020210 optoelectronics & photonics Optics Control and Systems Engineering 0103 physical sciences 0202 electrical engineering electronic engineering information engineering symbols Stokes parameters Systems design Quantum bit error rate Statistical analysis Electrical and Electronic Engineering business Instrumentation |
| Zdroj: | Optical Fiber Technology. 48:28-33 |
| ISSN: | 1068-5200 |
| DOI: | 10.1016/j.yofte.2018.12.012 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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