摘要
高精度时间传递技术关系到定位导航、高速通信、科学研究等多个领域的发展,开展高精度时间传递技术的相关研究具有重要意义.空间激光时间传递与基于微波的时间传递技术相比传递精度更高;相较于光纤时间传递技术又无需构建昂贵的专用传输信道,在大气、水下以及各种复杂地形、临时场合中都可以快速应用,突破了传输范围和应用环境的限制,因此进行激光时间传递技术的相关研究具有重要的现实意义和可观的发展前景.介绍了近些年自由空间中激光时间传递的四种主要技术,基于脉冲飞行时间测量的激光时间传递技术、与通信一体化的激光时间传递技术、基于高速伪码的时间传递技术、基于光梳的时间传递技术,梳理了四种技术体制的发展现状和趋势,为远距离高精度时间比对提供技术支撑.
Abstract
High-precision time transfer technology is related to the development of positioning and navigation,high-speed communication,scientific research and other fields,and it is of great significance to carry out relevant research on it.Space laser time transfer is more accurate than based on microwave.Compared with time transfer technology via optical fiber,there is no need to build expensive special transmission channels,and it can be rapidly applied in the atmosphere,underwater and a variety of complex terrain,as well as temporary occasions,which breaks through the limitation of the transmission range and the application environment.Therefore,the research on laser time transfer technology has important practical significance and considerable development prospects.In this paper,four main schemes of laser time transfer in recent years are introduced,laser time transfer technology based on pulse time of flight measurement,laser time transfer technology integrated with communication,time transfer technology based on high speed pseudo code,and time transfer technology based on optical comb.The development status and trend of the four technological systems are sorted,which provides technical support for long distance and high precision time comparison.
维普
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