超百G实验成功 中国星地激光通信业务化应用迈上新台阶

Core Insights - The China Academy of Space Technology has successfully conducted a business application experiment for space-ground laser communication, achieving a communication rate of 120Gbps, marking a significant advancement in China's capabilities in this field [1][4]. Group 1: Experiment Achievements - The experiment utilized a self-developed 500mm aperture laser communication system and the AIRSAT-02 satellite, enhancing the satellite's communication capacity from 60Gbps to 120Gbps without hardware changes [2][5]. - The experiment set a new record for space-ground laser communication transmission rates and addressed challenges related to establishing stable and efficient communication links [4][5]. - During the experiment, a successful link was established in seconds with a success rate exceeding 93%, achieving a maximum continuous communication duration of 108 seconds and transferring 12.656Tb of data [4][5]. Group 2: Technical Challenges and Solutions - The project faced several challenges, including satellite platform micro-vibrations and atmospheric turbulence, which affected the application efficiency of laser communication technology [5]. - The project team implemented key technological breakthroughs and optimizations to enhance signal stability and communication availability, ensuring the success of the 120Gbps experiment [5]. Group 3: Future Implications - The tower county laser ground station, as China's first operational space-ground laser communication station, has been undertaking various operational tasks since its establishment in September 2024, with continuous improvements in communication speed and efficiency [6][7]. - The demand for high-speed data transmission is increasing, and the limitations of microwave communication spectrum resources highlight the necessity for developing space-ground laser communication technology [8]. - With ongoing operational validation, space-ground laser communication is expected to become a backbone hub connecting space-based information networks and terrestrial fiber optic networks, contributing to an integrated space information network system [8].