经典-量子信号共纤同传系统四波混频噪声分析  

Four Wave Mixing Noise Analysis of Classical-quantum Signals Co-channel Transmission System

作　　者：李佳豪 石磊[1] 李天秀 薛阳[1] 李亚妮 LI Jiahao;SHI Lei;LI Tianxiu;XUE Yang;LI Yani(College of Information and Navigation,Air Force Engineering University,Xi'an 710077,China;North Photoelectric Technology Defense Co.,Ltd.,Xi'an 710043,China)

机构地区：[1]空军工程大学信息与导航学院,西安710077 [2]西安北方光电科技防务有限公司,西安710043

出　　处：《光子学报》2021年第9期133-142,共10页Acta Photonica Sinica

基　　金：国家自然科学基金(No.61971436,61803382)。

摘　　要：针对短距离、多用户的光纤网络集成量子密钥分发设备场景中量子信道与经典信道间隔较窄,经典光产生的四波混频噪声易对量子密钥分发性能产生严重影响的问题,构建了用于刻画四波混频效应导致离散变量量子密钥分发性能劣化的理论模型。通过OptiSystem和MATLAB联合仿真,深入分析对比了四种噪声抑制方案,实现了七路经典信号和一路量子信号10 Gbps数据速率的同向传输,经典信号的最小误码率为8.13×10^(-11),量子误码率最小可达到1.69%。研究结果对推动经典—量子信号共纤同传系统实用化进程具有重要意义。In the short-distance,multi-user quantum key distribution integrated optical fiber network scene,aiming at the problem that when the quantum channel and the classical channel are close to each other,the four-wave mixing noise generated by the classical light is easy to have a serious impact on the performance of quantum key distribution,a theoretical model is constructed to describe the deterioration of the performance of discrete variable quantum key distribution caused by the four-wave mixing effect.In order to suppress the influence of four wave mixing noise,four noise suppression schemes were built and analyzed in OptiSystem and MATLAB,which realized the simultaneous co-channel transmission of seven 10 Gbps classical signals and one quantum signal.The minimum bit error rate of classical signal is 8.13×10^(-11),and the quantum bit error rate is up to 1.69%at the minimum.The research results are of great significance for promoting the practical process of quantum-classical co-channel transmission system.

关 键 词：量子光学 量子密钥分发 波分复用 光纤通信 噪声抑制 

分 类 号：O431.1[机械工程—光学工程] O431.2[理学—光学]