Study on ultra-precision phase synchronization technique employing phase-locked loop  

作　　者：ZHANG Wan-peng WU Hong ZHOU Wei-feng ZHAO Ying-xin LIU Zhi-yang YANG Meng-huan 张万鹏;吴虹;周卫峰;赵迎新;刘之洋;杨梦焕(Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology,College of Electronic Information and Optical Engineering,Nankai University,Tianjin 300350,China)

机构地区：[1]Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology,College of Electronic Information and Optical Engineering,Nankai University,Tianjin 300350,China

出　　处：《Optoelectronics Letters》2021年第3期134-139,共6页光电子快报（英文版）

基　　金：This work has been supported by the National Natural Science Foundation of China(Nos.61571244 and 61871239);the Tianjin Research Program of Application Foundation and Advanced Technology(No.18YFZCGX00480)。

摘　　要：Microwave-to-optical phase synchronization techniques have attracted growing research interests in recent years. Here, we demonstrate tight, real-time phase synchronization of an optical frequency comb to a rubidium atomic clock. A detailed mathematical model of the phase locking system is developed to optimize its built-in parameters. Based on the model, we fabricate a phase locking circuit with high integration. Once synchronized, the fractional frequency instability of the repetition rate agrees to 6.35×10^(-12) at 1 s and the standard deviation is 1.5 mHz, which indicates the phase synchronization system can implement high-precision stabilization. This integrated stable laser comb should enable a wide range of applications beyond the laboratory.

关 键 词：SYNCHRONIZATION PHASE LOCKING 

分 类 号：TN911.8[电子电信—通信与信息系统]