A team in Japan set a new world record in fiber optics, reaching a data speed of 1.02 petabits per second over roughly 1,123 miles with a new kind of optical fiber. The achievement yielded a capacity–distance product of 1.86 exabits per second per mile.
That rate is about four million times higher than the U.S. median fixed broadband download speed of about 285 Mbps.
Lead researcher Hideaki Furukawa of the National Institute of Information and Communications Technology (NICT) in Japan guided the transmission experiments and system work.
A paper presented at the Optical Fiber Communication Conference and Exhibition (OFC) 2025 reported these results.
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