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Japan Shatters Internet Speed Record


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Optical fibers.

Engineers in Japan achieved a data transmission rate of 319 Terabits per second, a world record.

Credit: Christoph Bergstedt/iStock

Japanese engineers have broken the world Internet speed record with a 319 TB per second data transmission rate across more than 3,001 kilometers (1,864.7 miles) of existing fiber-optic infrastructure.

The achievement nearly doubles the previous record of 178 Tb/s.

The researchers used four cores, or glass tubes housed within data-transmission fibers to send signals segmented into several wavelengths simultaneously via wavelength-division multiplexing, while a seldom-used third band extended the distance of the transmissions through optical amplification.

The four-core optical fiber is the same diameter as conventional single-core fiber, so integrating the new method into existing infrastructure should be far simpler than other technological overhauls.

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