光纤时间传递方法及误差分析

Error Analysis of Optical-fiber Time Transfer Schemes

对多种光纤时间传递方法的误差来源及其时间传递精度进行了分析。介绍了单向、双向时间传递的基本原理以及它们在实际应用不同的布置形式,针对各自应用中的局限,提出了提高时间传递精度的改进方法。针对双向时间传递法,着重分析了光纤色散以及温度变化对传递精度的影响,建议采用疏波分复用或密波分复用来减小环境温度波动对时间传递不确定度的影响。

This paper introduces various optical - fiber time transfer schemes and analyzes their error sources and accuracy limits. Unidirectional and bidirectional time transfer methods and their variations in applications are presented, and their main limitation and improvement possibility are discussed. In particular, the authors examine the impact of chromatic dispersion and its temperature dependence on the transfer accuracy in the context of bidirectional schemes and recommend using of CWDM or DWDM to reduce the temperature dependence of the time transfer uncertainty.