With 319 Tb / s, Japan breaks the world record for data transmission speed

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New technology developed by Japanese engineers broke the previous record for data transmission speed.

Along an optical cable more than 3,000 kilometers (1,864 miles) long, the team achieved a data transmission speed of 319 terabits per second (Tb / s).

This not only breaks the previous record of an already breathtaking number 178 TB / s, the technology is compatible with the existing infrastructure, which means that it could be upgraded relatively easily.

The new record was set by a team of scientists and engineers led by physicist Benjamin Puttnam of the Japan National Institute of Information and Communication Technologies (NICT), and builds on previous work to which the NTIC participated, reaching speeds of 172 Tb / s, announced last year.

This achievement used a three-core coupled optical fiber, a technology that routes data along three fiber optic tubes rather than just one as is currently the standard, in order to reduce signal distortion over long distances. . The speed of 319 terabits used similar technology, but with four cores.

Schematic diagram of the system. (ICT)

The data is transmitted using a technology called wavelength multiplexing. It is emitted by a laser which divides the signals into 552 channels and sends them to the four fiber optic cores.

At 70 kilometer (43.5 mile) intervals along the fiber, the amplifiers increase signal strength to keep transmission loss to a minimum over long distances. These amplifiers are two new types doped with rare earths thulium and erbium.

Overall, the average data rate per channel was around 145 gigabits per second for each core and around 580 gigabits per second for the four cores combined. It’s still blazingly fast, all things considered.

The record speed of 319 terabits was reached on the 552 maximum wavelength channels.

The coating of the four optical fiber cores has the same diameter as the standard single-core optical fiber, which “is of interest for the early adoption of SDM fibers in high-speed long-haul links, as it is compatible with the infrastructure of the network. conventional cable and should have a mechanical reliability comparable to that of single-mode fibers “, the researchers noted.

The team plans to continue working on their long-distance data transmission system, to try to both increase transmission capacity and extend transmission range.

The team document was presented to the International Conference on Fiber Optic Communications in June.


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