北京交通大学学报2026，Vol.50Issue(2)：214-222,9.DOI:10.11860/j.issn.1673-0291.20250024
光纤双向时间传递链路校准及验证方法研究
Study on calibration and verification methods for two-way optic-fiber time transfer links
摘要
Abstract
Two-Way Optic-fiber Time Transfer(TWOTT)is currently one of the most accurate time transfer methods in terms of uncertainty performance,capable of achieving repeatability on the order of hundreds of picoseconds.As a critical influencing factor,link calibration directly affects the accuracy of time transfer results.To address current scarcity of research on TWOTT link calibration,the lack of standardized methods,and the difficulties in verifying calibration results,this study proposes a TWOTT link calibration method based on Common Clock Difference(CCD).First,a time transfer link composed of two TWOTT devices is established.Calibration experiments are conducted under common-clock conditions,and the CCD method is employed to obtain the link calibration results.Then,an uncertainty evaluation is performed to determine the combined standard uncertainty of the link calibration.Finally,a cross-validation method utilizing experimental results from multiple time transfer links is proposed.Under laboratory conditions,different time transfer links are used to simulta-neously compare two time scales,thereby verifying the TWOTT link calibration results.The experi-mental results demonstrate that the calibration value of the time transfer link composed of two TWOTT devices is 0.189 ns,with a combined standard uncertainty of 81 ps.When three different time transfer links are used simultaneously to compare two time scales in the laboratory,the differ-ences among the obtained clock offsets all fall within the range of comparison uncertainty.These results verify the effectiveness and accuracy of the proposed TWOTT link calibration method,providing a techni-cal reference for the calibration and verification of fiber-optic time transfer links.关键词
计量学/TWOTT/链路校准/时间传递/校准验证/不确定度Key words
metrology/TWOTT/link calibration/time transfer/calibration verification/uncertainty分类
通用工业技术引用本文复制引用
齐苗苗,梁坤,杨志强,邱旭强,张学东,王剑,林平卫,李雨峰..光纤双向时间传递链路校准及验证方法研究[J].北京交通大学学报,2026,50(2):214-222,9.基金项目
国家自然科学基金(12473072) （12473072）
泰山产业领军人才(tscx202408155) （tscx202408155）
烟台市重大科技创新工程项目(2024ZDCX002) （2024ZDCX002）
中央高校基本科研业务费专项资金(W23YJS00280)National Natural Science Foundation of China(12473072) （W23YJS00280）
TaiShan Industrial Experts Program(tscx202408155) （tscx202408155）
Yantai Major Science&Technology Innovation and Development Project(2024ZDCX002) （2024ZDCX002）
Fundamental Research Funds for the Central Universities(W23YJS00280) （W23YJS00280）
