120吉比特每秒！我国超高速星地激光通信实现业务化突破

Core Insights - China has successfully conducted a business application experiment for space-ground laser communication, achieving a stable high-speed transmission rate of 120 Gbps, setting a new record in the field [1][3] - This advancement marks a new phase in the business application of space-ground laser communication, laying a critical technological foundation to meet future demands for massive space-based data transmission [1] Group 1: Experiment Details - The experiment was conducted at the Xinjiang Tak County laser ground station, utilizing the AIRSAT-02 satellite developed by China Aerospace Science and Technology Corporation [3] - The laser link established a rapid capture and connection within seconds, with a success rate exceeding 93%, and the longest continuous stable communication lasting 108 seconds [3] - The research team achieved this enhancement without modifying the satellite hardware, instead employing "on-orbit software reconfiguration" to double the original transmission capacity from 60 Gbps to 120 Gbps [3][5] Group 2: Technical Challenges and Solutions - Space-ground laser communication utilizes laser as a medium for high-speed information transfer, offering advantages such as large bandwidth, strong anti-interference capability, and good confidentiality [3] - The team overcame three core technical challenges: optimizing real-time correction algorithms to stabilize light beam disturbances caused by atmospheric turbulence, applying advanced compensation techniques to reduce data error rates, and improving adaptive transmission strategies to maximize channel capacity [5] - The successful operation of space-ground laser communication demonstrates its capability to support future massive space data transmission, with potential to become a key hub connecting space-based information networks and ground fiber networks [5]