通用量子密钥分发的同步控制电路

Electronic Synchronous Control General Circuit for Quantum Key Distribution

通过仔细分析连续变量和离散变量量子密钥分发系统的光路原理和各个光学部件性能和要求,提出了一种能用于各种量子密钥分发实验中的电路控制模块。该方案能够产生精度可达纳秒量级的时钟信号,采用Xilinx公司的Virtex-4型FPGA开发板,实现整个系统高度集成,最后利用嵌入式开发工具ISE9.1i和EDK9.1i完成了方案的实现,并生成bit文件下载进FPGA,经验证完全满足实验要求。

This paper discusses in detail the principle of the optical devices in both continuous and discrete variable quantum key distribution, including the classical QKD communication system. A circuit control module using Xilinx Corporation＇s ML405 Evaluation Platform and suitable for various QKD experiments is proposed. The controller generates necessary nanosecond clock signals for optical devices and integrates quantum cryptography communication system. Finally, the design flow is implemented by downloading the bit stream, which is generated by the Embedded Software ISE9.1 i and EDK9. I i, into FPGA chip, and completely meets the needs of the experiment.