Stop bragging about your fiber connection at (not really) 10 Gbit / s ! Researchers at University College London have indeed exploded the counters by beating the world record for data transmission speed on the Internet: 178 Terabits per second, or 178,000 Gbit / s, to compare with your champion connection.

Supported by two companies (the American Xtera and the Japanese KDDI), Dr. Lidia Galdino’s team improved by 20% the previous record held by Japanese researchers. To achieve a speed that UCL claims would download the entire Netflix catalog in less than a second.

Faster without laying new cables

This new speed record has one virtue: it is essentially based on new amplifiers and not on a new type of fiber. By working on the property of light, researchers were able to improve the bandwidth of data that can pass through “normal” fiber. It’s more than a detail: according to the researchers, a kilometer of fiber can cost up to € 500,000 per kilometer while changing the signal amplifiers (to be placed every 40 to 100 km) costs only € 18,000 per unit .

These amplifiers are critical for this experimental use as researchers have pushed the current limits of commercial fiber bandwidth, which ranges from 4.5 THz to 9 THz, to up to 16.8 THz. An extension that extends the range of wavelengths of available colors.

The theoretical limit in approach

This experimental achievement approaches the theoretical limit of transmission speed, the Shannon Relation. Edited by the American mathematician Claude Shannon, this maximum flow could quickly be reached by the next teams who would set a new record. It would then remain either to make lie a physical law, or to pass to another type of carrier fiber.

Source : UCL





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