面向卫星互联网的星载光交换技术

Spaceborne Optical Switching Technology for Satellite Internet

随着卫星遥感、大数据超算中心、视频战场、6G移动通信等超高速大容量信息传输需求日益提高,以激光取代传统微波作为信息载体的卫星通信技术发展成为趋势,这也是解决微波通信带宽瓶颈和缓解频谱资源紧张的有效手段。未来需要构建全球覆盖的卫星互联网,提供地面光纤网络所不具备的能力(大覆盖率、低时延、人口稀少地区服务、无地理障碍等)。对于未来卫星节点超高速大容量信息处理来说,星载光交换技术是关键与核心。首先,介绍基于激光通信的卫星互联网发展脉络,分析面向卫星互联网的星载光交换技术的重要性,重点对星载光交换技术进行细致地分类对比、体制及信息处理模式研究,展示潜在的技术方案。然后,针对光交换核心器件特性和应用方案进行分析研究,希望为下一代卫星互联网技术研究提供借鉴与参考。

With the increasing demands for ultra-high speed and large-capacity information transmission such as satellite remote sensing,big data super computing center,video battlefield and 6G mobile communication.The satellite laser communication technology using laser instead of traditional microwave as information carrier has become development trend.It is an effective mean to solve the bottleneck of microwave communication bandwidth and reduce the shortage of spectrum resources.In the future,we need to build a satellite internet with global coverage,which are needed to provide the capabilities that terrestrial optical fiber networks do not have(large coverage,low-delay,services in sparsely populated areas,no geographical obstacles,etc.).The spaceborne optical switching technology is the key and core for the ultra-high speed and large capacity information processing on satellite nodes.Firstly,the development context of satellite internet based on laser communication was introduced,the importance of spaceborne optical switching technology for satellite internet was analyzed.It focused on the detailed classification and comparison,system and information processing mode of space-borne optical switching technology,and showed the potential technical scheme in the future.Then,the characteristics and application schemes of optical switching core devices were analyzed and studied to provided reference for the next generation of satellite internet technology research.