Hundred-femtosecond-level concise optical time delay measurement system based on linear optical sampling

作     者：Zhang, Yufei Chen, Ziyang Yu, Dongrui Niu, Jialin Chen, Xing Guo, Hong 

作者机构：Peking Univ Sch Elect State Key Lab Adv Opt Commun Syst Beijing 100871 Peoples R China Peking Univ Ctr Quantum Informat Technol Beijing 100871 Peoples R China Beijing Univ Posts & Telecommun State Key Lab Informat Photon & Opt Commun Beijing 100876 Peoples R China 

出 版 物：《REVIEW OF SCIENTIFIC INSTRUMENTS》 (科学仪器评论)

年 卷 期：2023年第94卷第8期

页      面：1-7页

核心收录：

学科分类：08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 081102[工学-检测技术与自动化装置] 0811[工学-控制科学与工程] 0702[理学-物理学] 

基　　金：National Natural Science Foundation of China [62201012, 61531003] National Hi-Tech Research and Development (863) Program 

主　　题：Timing circuits 

摘      要：Fiber-delay measurement is one of the key fundamental technologies in numerous fields. Here, we propose and experimentally demonstrate a high-precision and concise optical time delay measurement system based on the technique of linear optical sampling, reaching the precision better than 100 fs under averaging. The use of only two optical frequency combs without locking the carrier-envelope-offset frequency greatly simplifies the structure of the time-delay measurement system. We also experimentally investigate the current limitations on the precision of the system. The timing jitter noises of two sources are mainly non-common mode and are both restricted to the frequency sources. Our results indicate that the proposed device can measure fiber length fluctuations below 10 mu m, paving the way for further analyses of the external disturbances on the fiber link.