光纤频率传递的链路不对称性分析

基于光纤的频率传递在时频同步体系的构建与应用中占据着重要地位。为了在射频稳相传输系统中定量研究由于温度不对称和波长不对称所引入的延迟波动和色散残余等因素对系统稳定性的影响，使用光学仿真软件搭建了简易频率传递系统与3 000 km光纤链路进行10 GHz射频信号传递的仿真分析。通过分析发现链路中引入的温度不对称对系统频率稳定性影响较小，而波长不对称所导致的影响较大，随着正反向波长的差异增大，系统频率稳定性恶化量级在10^-13/ s以上。此研究分析对实际环境下的长距离光纤频率传递系统的建设及优化具有实际指导作用。

Analysis of link asymmetry for stable radio frequency transmission over optical fiber

Frequency transmission based on optical fibers plays an important role in the construction and application of time?frequency synchronization systems. In order to quantify the effect of delay fluctuations and dispersive residuals introduced by temperature and wavelength asymmetries on the stability of the stable radio frequency transmission system, a simple frequency transmission system and a 3 000 km fiber link are constructed using optical simulation software for simulation and analysis of 10 GHz RF signal transmission. Through analysis, it is found that the temperature asymmetry introduced in the link has a small effect on system frequency stability, while the wavelength asymmetry has a larger effect. The stability of the system deteriorates by more than 10^-13/ s as the difference between the positive and negative wavelength increases. This study has a practical guiding effect on the construction and optimization of the long distance optical fiber frequency transmission system in the actual environment.