面向星地融合的激光通信:研究现状、关键技术与未来展望  

Laser Communications for Satellite-Terrestrial Integration:Research Status,Key Technologies,and Future Prospects

作　　者：袁仁智 郭嘉[1] 姚海峰 陈之北 李玉钗 孙耀华 彭木根[1] YUAN Renzhi;GUO Jia;YAO Haifeng;CHEN Zhibei;LI Yuchai;SUN Yaohua;PENG Mugen(Beijing University of Posts and Telecommunications,the State Key Laboratory of Networking and Switching Technology,Beijing 100876,China;Beijing Institute of Technology,School of Optics and Photonics,Beijing 100080,China;National and Local Joint Engineering Research Center for Space Optoelectronic Technology,Changchun 130000,China)

机构地区：[1]北京邮电大学网络与交换技术全国重点实验室,北京100876 [2]北京理工大学光电学院,北京100080 [3]空间光电技术国家地方联合工程研究中心,吉林长春130000

出　　处：《天地一体化信息网络》2024年第4期34-42,共9页Space-Integrated-Ground Information Networks

基　　金：国家重点研发计划资助项目(No.2022YFB2902603);国家自然科学基金资助项目(No.62201075,No.62105029)。

摘　　要：卫星激光通信利用波长更短的激光作为信息载体进行数据传输,能够实现比射频通信更高的传输速率;光波段的频谱资源丰富,具备比射频通信更大的带宽;此外,激光束的高度定向性和窄波束特性使激光难以被拦截和窃听。卫星激光通信凭借高速率、高带宽、高安全性以及频谱资源丰富等特点,已成为6G星地融合网络发展的重要支撑技术。总结面向星地融合的激光通信国内外研究现状,重点分析卫星激光通信瞄准捕获跟踪、调制与编码、交换与路由以及激光与射频协作等关键技术,并展望相应关键技术的未来发展方向,为我国未来研究和发展面向星地融合网络的激光通信技术提供参考。Satellite laser communication uses laser with shorter wavelength as the information carrier for data transmission,which can achieve a higher data transmission rate than RF communication.With an abundant spectrum resource of in optical band,the laser com‐munication has a larger bandwidth than RF communication.Besides,because of the highly directional and narrow beam characteristics of the laser beam,it is difficult to intercept and eavesdrop the laser links.Satellite laser communication,with its characteristics of high speed,high bandwidth,high security,and abundant spectrum resources,has become an important supporting technology for the devel‐opment of future 6G satellite-terrestrial integration networks.This paper summarized the current research status of laser communication for satellite-terrestrial integration both domestically and internationally,with a focus on key technologies such as satellite laser commu‐nication pointing,acquisition,and tracking,modulation and coding,switching and routing,and laser-radio frequency cooperation.The future development directions of corresponding key technologies were also discussed,provided direction reference for future research and development of laser communication technology for satellite-terrestrial integration networks in China.

关 键 词：星地融合网络 卫星激光通信 激光与射频协作 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]