Anti-Interference High-Speed Modulation Decoder for Quantum Key Distribution  

作　　者：Hua-Xing Xu Shao-Hua Wang Chang-Lei Wang Ping Zhang 许华醒;王少华;王昌雷;张平(National Engineering Research Center for Public Safety Risk Perception and Control by Big Data,China Academic of Electronics and Information Technology,Beijing 100041,China;CETC Academy of Electronics and Information Technology Group Co.,Ltd.,Beijing 100041,China)

机构地区：[1]National Engineering Research Center for Public Safety Risk Perception and Control by Big Data,China Academic of Electronics and Information Technology,Beijing 100041,China [2]CETC Academy of Electronics and Information Technology Group Co.,Ltd.,Beijing 100041,China

出　　处：《Chinese Physics Letters》2025年第1期34-39,共6页中国物理快报(英文版)

基　　金：supported by the National Natural Science Foundation of China under Grant No.62001440。

摘　　要：Quantum key distribution is increasingly transitioning toward network applications,necessitating advancements in system performance,including photonic integration for compact designs,enhanced stability against environmental disturbances,higher key rates,and improved efficiency.In this letter,we propose an orthogonal polarization exchange reflector Michelson interferometer model to address quantum channel disturbances caused by environmental factors.Based on this model,we designed a Sagnac reflector-Michelson interferometer decoder and verified its performance through an interference system.The interference fringe visibility exceeded 98%across all four coding phases at 625 MHz.These results indicate that the decoder effectively mitigates environmental interference while supporting high-speed modulation frequencies.In addition,the proposed anti-interference decoder,which does not rely on magneto-optical devices,is well-suited for photonic integration,aligning with the development trajectory for next-generation quantum communication devices.

关 键 词：DECODER INTERFEROMETER POLARIZATION 

分 类 号：O413[理学—理论物理] TN918.4[理学—物理] TN911.3[电子电信—通信与信息系统]