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Updated: Jul 16, 2025

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稳定无线电频率的多节点传播,在2000公里光纤上不稳定10~17

Hao Gao, Baodong Zhao, Zhuoze Zhao

|September 15, 2023

概括

这项研究表明,多节点稳定无线电频率 (RF) 在远距离光纤上的传播系统. 该系统实现了在任何节点可访问的高精度频率同步,这对于高级应用至关重要.

科学领域:

物理物理学物理
工程工程师工程师工程师
电信电信服务电信服务电信服务

背景情况:

灵活访问高精度同步频率的需求很大.
现有的方法在多节点传播和精度方面可能存在局限性.

研究的目的:

通过远距离光纤展示一个多节点稳定的无线电频率 (RF) 传播系统.
为了使稳定的射频信号提取在光纤沿线的任何节点.
为了实现高精度的频率同步.

主要方法:

使用多节点稳定频率传播系统 (MFDS).
采用差异混合结构 (DMS) 来防止频率波泄漏并提高精度.
集成了用于频率参考的相锁循环 (PLL) 和改进的信号噪声比 (SNR).
沿着2000公里的光纤进行测量.

主要成果:

在1秒的平均时间内测量的短期频率不稳定性:1.90 × 10^-14 @ 500公里,2.81 × 10^-14 @ 1,000公里,3.46 × 10^-14 @ 1,500公里,和3.84 × 10^-14 @ 2,000公里.
实现了长期频率不稳定性 (10,000秒平均时间) 约为 (6.24 ± 0.05) × 10-17,在所有测试的光纤位置一致.
证明足够的不稳定性,用于精确的活性质质光片传播.

结论:

开发的MFDS通过远距离光纤提供稳定的高精度射频传播.
该系统允许在多个节点灵活访问同步的频率信号.
实现的频率稳定性满足了诸如精确计时等应用的严格要求.

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