China’s AO-MDR Laser Link Delivers 1 Gbps from Geostationary Orbit
Chinese researchers have achieved a record-breaking 1 gigabit-per-second data downlink from a satellite in geostationary orbit using an optical laser link – with a laser device as weak as a “night light” or candle in power scmp.com scmp.com. In a recent demonstration, a 2-watt laser beam transmitted data to a ground station at 1 Gbps, a speed about five times faster than SpaceX’s Starlink network typically delivers to users scmp.com interestingengineering.com. This milestone showcases a new technology dubbed “AO-MDR synergy,” which allowed the laser signal to punch through Earth’s turbulent atmosphere without significant quality loss scmp.com defencepk.com. The achievement, led by Prof. Wu Jian of Peking University of Posts and Telecommunications and Liu Chao of the Chinese Academy of Sciences, opens the door to next-generation satellite communications that rival terrestrial fiber-optic speeds.