基于不同位置的动态光路延迟装置和位于罗兰C主台的纠缠源信号,通过主台非平衡M-Z(马赫-曾德尔)干涉仪检测不同路径纠缠光场的相位差信息,得到罗兰C主、副台的同步时差信息。理论和仿真分析结果表明,在相位差为0.5π时,能得到最佳时差信息,精度能达到数十皮秒级别。相较于原有的主从同步或自由同步等方式,此方案不需要测量脉冲到达时间,而且能够突破量子噪声极限,有效提高了测时精度。

Based on the dynamic optical path delay device with different positions and the entangled source signals at Roland C main station as well as the phase difference information of entangled light fields with different paths detected by the main station unbalanced M-Z (Mach-Zehnder) interferometer, the synchronization time difference information of Roland C main and auxiliary stations is obtained. The theoretical and simulation results show that the optimal time difference information with a precision of tens of picoseconds is obtained when the phase difference is 0.5π. Compare with the original master-slave synchronization, free synchronization and others, the proposed scheme does not need to measure the pulse arrival time. Moreover it can break through the quantum noise limit and effectively improve the time measurement accuracy.