{"title":"基于信道穆勒参数检测的量子通信实时偏振补偿方法","authors":"Yongjian Tan, Jianyu Wang, Jincai Wu, Zhiping He","doi":"10.1038/s44172-024-00198-0","DOIUrl":null,"url":null,"abstract":"Polarization drift in fiber and free-space optical links is a major factor in the dynamic increase of bit error rate in polarization-coded quantum key distribution (QKD) systems. A dynamic polarization compensation method applicable to both links is a challenge. Here we propose a universally applicable real-time polarization compensation method, that the Muller parameters of the optical links are first detected using a polarization detector, and then the optimal parameters of the controller are obtained by gradient descent algorithm. Simulation results indicate advantages over current methods, with fewer waveplates, faster speed, and wider applicability for various optical links. In equivalent experiments of both satellite and fiber optical links, the average polarization extinction ratio of 27.9 dB and 32.2 dB are respectively achieved. The successful implementation of our method will contribute to the real-time polarization design of fiber and free-space QKD systems, while also contributing to the design of laser-based polarization systems. Yongjian Tan and colleagues report a universally applicable real-time polarization compensation method for quantum communications. The approach has several advantages over current methods, including a minimum number of waveplates, faster speed, and wider applicability for various optical links.","PeriodicalId":72644,"journal":{"name":"Communications engineering","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s44172-024-00198-0.pdf","citationCount":"0","resultStr":"{\"title\":\"Real-time polarization compensation method in quantum communication based on channel Muller parameters detection\",\"authors\":\"Yongjian Tan, Jianyu Wang, Jincai Wu, Zhiping He\",\"doi\":\"10.1038/s44172-024-00198-0\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Polarization drift in fiber and free-space optical links is a major factor in the dynamic increase of bit error rate in polarization-coded quantum key distribution (QKD) systems. A dynamic polarization compensation method applicable to both links is a challenge. Here we propose a universally applicable real-time polarization compensation method, that the Muller parameters of the optical links are first detected using a polarization detector, and then the optimal parameters of the controller are obtained by gradient descent algorithm. Simulation results indicate advantages over current methods, with fewer waveplates, faster speed, and wider applicability for various optical links. In equivalent experiments of both satellite and fiber optical links, the average polarization extinction ratio of 27.9 dB and 32.2 dB are respectively achieved. The successful implementation of our method will contribute to the real-time polarization design of fiber and free-space QKD systems, while also contributing to the design of laser-based polarization systems. Yongjian Tan and colleagues report a universally applicable real-time polarization compensation method for quantum communications. The approach has several advantages over current methods, including a minimum number of waveplates, faster speed, and wider applicability for various optical links.\",\"PeriodicalId\":72644,\"journal\":{\"name\":\"Communications engineering\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-03-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.nature.com/articles/s44172-024-00198-0.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Communications engineering\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.nature.com/articles/s44172-024-00198-0\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Communications engineering","FirstCategoryId":"1085","ListUrlMain":"https://www.nature.com/articles/s44172-024-00198-0","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
光纤和自由空间光链路中的偏振漂移是偏振编码量子密钥分发(QKD)系统误码率动态增加的一个主要因素。适用于这两种链路的动态偏振补偿方法是一项挑战。在这里,我们提出了一种普遍适用的实时偏振补偿方法,即首先使用偏振检测器检测光链路的 Muller 参数,然后通过梯度下降算法获得控制器的最优参数。仿真结果表明,与现有方法相比,该方法具有波板少、速度快、适用于各种光链路等优点。在卫星和光纤链路的等效实验中,平均极化消光比分别达到了 27.9 dB 和 32.2 dB。我们的方法的成功实现将有助于光纤和自由空间 QKD 系统的实时偏振设计,同时也有助于基于激光的偏振系统的设计。谭永健及其同事报告了一种普遍适用的量子通信实时偏振补偿方法。与目前的方法相比,该方法有几个优点,包括波板数量最少、速度更快以及更广泛地适用于各种光链路。
Real-time polarization compensation method in quantum communication based on channel Muller parameters detection
Polarization drift in fiber and free-space optical links is a major factor in the dynamic increase of bit error rate in polarization-coded quantum key distribution (QKD) systems. A dynamic polarization compensation method applicable to both links is a challenge. Here we propose a universally applicable real-time polarization compensation method, that the Muller parameters of the optical links are first detected using a polarization detector, and then the optimal parameters of the controller are obtained by gradient descent algorithm. Simulation results indicate advantages over current methods, with fewer waveplates, faster speed, and wider applicability for various optical links. In equivalent experiments of both satellite and fiber optical links, the average polarization extinction ratio of 27.9 dB and 32.2 dB are respectively achieved. The successful implementation of our method will contribute to the real-time polarization design of fiber and free-space QKD systems, while also contributing to the design of laser-based polarization systems. Yongjian Tan and colleagues report a universally applicable real-time polarization compensation method for quantum communications. The approach has several advantages over current methods, including a minimum number of waveplates, faster speed, and wider applicability for various optical links.