Two-Way Fiber-Optic Time Synchronization System Based on Feedforward-Feedback Phase Compensation

IF 2.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2025-06-27 DOI:10.1109/LPT.2025.3583783

Jiameng Dong;Zhaohui Wang;Jiayi Dou;Yichen Zhang;Song Yu;Bin Luo

引用次数: 0

Abstract

Synchronizing remote frequency references is critical in two-way fiber-optic time synchronization systems. Without dedicated frequency transfer systems, it can be realized via frequency or phase compensation. However, these standalone compensation methods suffer from excessive parameter dependence or poor mitigation of time-varying frequency differences. Therefore, this letter proposes a feedforward-feedback phase compensation scheme integrating frequency compensation as a proactive method for clock difference drift suppression, overcoming single-method limitations while broadening applicability. The proposed method is validated on a laboratory 400 km two-way time synchronization system with a free-running remote oscillator, achieving 17.47 ps@1 s and 1.3 ps@1000 s, demonstrating its potential for precision time-frequency applications.

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基于前馈-反馈相位补偿的双向光纤时间同步系统

同步远程频率参考是双向光纤时间同步系统的关键。没有专用的频率传输系统，可以通过频率或相位补偿来实现。然而，这些独立的补偿方法存在参数依赖性过大或对时变频率差影响较差的问题。因此，本文提出了一种前馈反馈相位补偿方案，结合频率补偿作为抑制时钟差漂移的主动方法，克服了单一方法的局限性，同时扩大了适用性。该方法在实验室400公里双向时间同步系统上进行了验证，实现了17.47 ps@1 s和1.3 ps@1000 s，证明了其在精密时频应用中的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.