Time Reversal Enabled Fiber-Optic Time Synchronization
Yufeng Chen, Hongfei Dai, Wenlin Li, Fangmin Wang, Bo Wang, and Lijun, Wang

TL;DR
This paper introduces a novel fiber-optic time synchronization method using time reversal that simplifies system complexity and enables multiple-access synchronization without a data layer, demonstrated over 230 km.
Contribution
It proposes a time reversal enabled FOTS technique that reduces system complexity and supports multiple-access synchronization, advancing large-scale network applications.
Findings
Successful demonstration over 230 km fiber link
Achieved high-precision synchronization without data layer
Supports multiple-access synchronization along fiber
Abstract
Over the past few decades, fiber-optic time synchronization (FOTS) has provided fundamental support for the efficient operation of modern society. Looking toward the future beyond fifth-generation/sixth-generation (B5G/6G) scenarios and very large radio telescope arrays, developing high-precision, low-complexity and scalable FOTS technology is crucial for building a large-scale time synchronization network. However, the traditional two-way FOTS method needs a data layer to exchange time delay information. This increases the complexity of system and makes it impossible to realize multiple-access time synchronization. In this paper, a time reversal enabled FOTS method is proposed. It measures the clock difference between two locations without involving a data layer, which can reduce the complexity of the system. Moreover, it can also achieve multiple-access time synchronization along the…
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Taxonomy
TopicsNetwork Time Synchronization Technologies · Optical Coherence Tomography Applications · Advanced Frequency and Time Standards
