Sub-100 fs precision clock-offset measurement over a 100 km fiber link

IF 2.5 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2025-09-20 DOI:10.1016/j.optcom.2025.132495

Fei Meng , Yunfeng Wu , Yanrong Song , Zhigang Zhang

引用次数: 0

Abstract

We demonstrate a precision clock-offset measurement via a 100 km dispersion-compensated fiber link. For transferring highly stable optical frequency and realizing high mutual coherence, each comb was fully phase-locked to semiconductor external cavity lasers which are stabilized to a high-finesse cavity. We also investigated the transmission time bias caused by the different DWDM channels used in bi-directional transmission and corrected it in the final measurement results. The clock-offset was 72 fs (standard deviation) over 100 independent measurements during 10 consecutive hours.

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在100公里光纤链路上进行100秒以下精确时钟偏移测量

我们演示了通过100公里色散补偿光纤链路的精确时钟偏移测量。为了传递高稳定的光频率和实现高互相干性，每个梳都被完全锁相到半导体外腔激光器中，该激光器稳定在高精细腔中。我们还研究了双向传输中使用的不同DWDM信道所造成的传输时间偏差，并在最终的测量结果中进行了修正。在连续10小时的100次独立测量中，时钟偏移为72秒（标准偏差）。

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

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.