Design of Event Timer with Femtosecond Stability and Its Application in Laser Time Transfer

WU Zhi-bo; QIU Du-yu; TANG Kai; MENG Wen-dong; LIN Hai-sheng; XIAO Ai-ming; GAO Shuai-he; ZHANG Zhong-ping

doi:10.12263/DZXB.20220299

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Design of Event Timer with Femtosecond Stability and Its Application in Laser Time Transfer

PAPERS | 更新时间：2025-12-08

- Design of Event Timer with Femtosecond Stability and Its Application in Laser Time Transfer
- ACTA ELECTRONICA SINICA Vol. 51, Issue 8, Pages: 2152-2159(2023)
- 作者机构：
  
  1.中国科学院上海天文台，上海 200030
  2.中国科学院空间目标与碎片观测重点实验室，江苏南京 210008
  3.电子科技大学自动化工程学院，四川成都 610054
  4.上海大学机电工程与自动化学院，上海 200444
  5.中国科学院空间应用工程与技术中心，北京 100094
  6.中国科学院国家授时中心，陕西西安 710600
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(12003056;11903066)
- DOI：10.12263/DZXB.20220299
  CLC： TH75;
- Received：24 March 2022，
  
  Revised：2022-06-14，
  
  Published：25 August 2023
- 稿件说明：
移动端阅览
吴志波,邱渡裕,汤凯等.飞秒稳定度事件计时器设计及激光时间比对应用[J].电子学报,2023,51(08):2152-2159.

WU Zhi-bo,QIU Du-yu,TANG Kai,et al.Design of Event Timer with Femtosecond Stability and Its Application in Laser Time Transfer[J].ACTA ELECTRONICA SINICA,2023,51(08):2152-2159.
吴志波,邱渡裕,汤凯等.飞秒稳定度事件计时器设计及激光时间比对应用[J].电子学报,2023,51(08):2152-2159. DOI： 10.12263/DZXB.20220299.

WU Zhi-bo,QIU Du-yu,TANG Kai,et al.Design of Event Timer with Femtosecond Stability and Its Application in Laser Time Transfer[J].ACTA ELECTRONICA SINICA,2023,51(08):2152-2159. DOI： 10.12263/DZXB.20220299.

摘要

事件计时器可实现输入事件时刻的高精度、高稳定测量，且工作频率不受测量间隔限制，是星地激光时间比对中不可或缺的设备.为满足飞速发展星载原子钟的评估要求，对星地激光时间比技术中激光发射、到达和返回时刻的测量提出亚飞秒稳定度和皮秒精度需求.采用FPGA配合计时芯片THS788开发了高精度事件计时器，测量精度约8 ps，非线性误差皮秒级，测量频率大于10 kHz；将基准时钟分频后作为校准信号，实现时延漂移的实时标校，时刻测量稳定性提升5倍以上.将该计时器应用在星地激光时间比对载荷，载荷测量稳定性（Time DEViation，TDEV）优于0.07 ps@300 s和0.84 ps@1 day.计时器达到国际主流产品A033-ET水平，既满足

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5.92666674

2.53999996

量级准确度原子钟的时频传递需求，又可用于毫米级精度卫星激光测距，具有较好的推广应用价值.

Abstract

The event timer can realize high-precision and high-stability measurement of the input event time

and the operating frequency is not limited by the measurement interval. It is an indispensable device for satellite-to-ground laser time transfer. In order to meet the evaluation requirements of the rapid development of spaceborne atomic clocks

sub-femtosecond stability and picosecond accuracy are proposed for the measurement of laser emission

arrival and return epochs in the laser time transfer technology. A high-precision event timer is developled by using FPGA and timing chip THS788. Its measurement accuracy is about 8 ps

the nonlinear error is less than 1 ps

and t

he measurement frequency is greater than 10 kHz. The reference frequency divided signal is used as the calibration signal to realize the real-time calibration of the delay drift and 5 times of improved measurement stability

so that the time deviation (TDEV) is better than 0.07 ps@300 s and 0.84 ps@1 day which applied in payload of China space station. The performance of the developed event timer reaches the level of the international mainstream product A033-ET

which not only meets the time-frequency transfer requirements of atomic clocks with

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=61158719&type=

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5.92666674

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level accuracy

but also can be used for millimeter-level precision satellite laser ranging

which has good promotion and application value.

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Keywords

references

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