Phase-Modulation-Based Coarse Time Synchronization for Linear Optical Sampling System

Abstract

SummaryWith the rapid development of atomic clock technologies, the accuracy and stability of atomic frequency standard are increasing day by day, which puts forward higher requirements for the corresponding time-frequency transfer technology. The accuracy and stability of the traditional time synchronization are difficult to meet higher requirements for time synchronization. The accuracy of time synchronization can be significantly improved by using linear optical sampling (LOS), in which coarse time synchronization also plays a very important role. Here we study the coarse time synchronization technology based on phase modulation, and the timing jitter of the signal obtained by the receiving module is less than 20 ps when the sending module and the receiving module are directly connected without fiber link. This system is expected to be used in the LOS system.