The primary challenge in satellite laser downlinks is atmospheric turbulence, which distorts and weakens signals.
Chinese scientists have reportedly achieved a 1 Gigabit per second data transmission from a geostationary satellite to Earth using just a 2-watt laser. The South China Morning Post reported that this speed is “five times faster than Starlink.” Starlink, Space X’s satellite internet service, operates from 341 miles above Earth. Starlink’s top speeds typically reach only a few Mbps. To address this, the researchers developed a novel “AO-MDR synergy” method.
Thereafter, the light goes into a multi-mode fiber, which splits into eight base-mode channels by a multi-plane converter .The next step is to determine which of these channels carries the most reliable and strongest signal. This is where the “path-picking” algorithm comes in.The algorithm analyzes the signal strength and quality of each of the 8 base-mode channels in real-time. It then identifies the three strongest and most coherent signals among these 8 channels.
China Communication Inventions And Machines Laser Satellite Space
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