Study on ultra-precision phase synchronization tech-nique employing phase-locked loop

• 作者: ZHANG Wan-peng WU Hong ZHOU Wei-feng ZHAO Ying-xin LIU Zhi-yang YANG Meng-huan
• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2021,（3）
• 所属期刊栏目: Devices
• 页码范围: 134-139
• 页数: 6页
• 语种: 英文
• DOI: 10.1007/s11801-021-0036-3

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 de-tailed 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 6.35×10-12at 1 s and the standard deviation is 1.5 mHz,which indicates the phase syn-chronization system can implement high-precision stabilization.This integrated stable laser comb should enable a wide range of applications beyond the laboratory.