摘要
由于光子偏振态在长距离光纤中无法保持稳定,因此以偏振编码为基础的量子保密通信系统需要进行偏振控制以保持成码的正确性。在实用化量子保密通信的研究中,用现场可编程门阵列(field programmable gate array,FPGA)替代计算机作为系统的控制核心已经成为一个重要的研究方向,这种方案具有高效率、高集成度等优势。针对这种情况,提出了利用FPGA实现单光子偏振控制的方案,经实验演示证明了这套方案的有效性和稳定性,90%的成码耗时远高于计算机控制核心时的65%的最大值,相同编解码、纠错方式情况下,拥有更大的成码耗时便可以得到更高效的密钥生成。整个控制过程中FPGA和单光子探测以及电动偏振控制器(electric polarization controller,EPC)电压调节机制可以统一集成,实现偏振控制的小型化。
The polarization of photons in the optical fiber cannot maintain stable for long distance.Therefore,polarization control is necessary for the fiber-based polarization-encoded quantum security communication system to guarantee correct key generation.With the development of the practical quantum communication,field programmable gate array（FPGA）has played an important role in the information processing and system operation due to its advantage of high efficiency,high integration and high security.A polarization control scheme and polarization initialization is presented and applied to the BB84 protocol based on FPGA to stabilize photon polarization in the fiber.90%of a code-consuming is higher than 65%of the maximum value in the computer control center.With the same codec and error correction mode,if who has more time consuming for coding,then he will get more efficient key generation.FPGA,single photon detection,and electric polarization controller（EPC）mechanism can be unified and integrated to achieve the miniaturization of quantum polarization controlling.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2016年第8期1917-1921,共5页
Systems Engineering and Electronics
基金
国家自然科学基金(61179029)资助课题
关键词
量子通信
现场可编程门阵列
偏振控制
quantum security communication
field programmable gate array（FPGA）
polarization controlling
