Technology in Japan that allows data transfer at speeds of up to 319 TB

Japanese scientists reach 319 terabytes of data transfer speed

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Engineers in Japan broke the world record for the fastest internet speed, achieving a data transfer rate of 319 terabits per second (Tb/s), according to a paper presented at the International Conference on Fiber Optic Communications last June. The new record was set on a fiber line more than 1,864 miles (3,000 km) long. It is compatible with modern cabling infrastructure.

The speed achieved by the Japanese experts is almost double the previous record of 178 TB / s, which was set in 2020. It is seven times faster than the previous record of 44.2 TB / s, with an experimental optical chip.
NASA itself uses a relative primitive speed of 400 Gbit/s, and the new record rises impossibly higher than what average consumers can use (the fastest being up to 10 Gbit/s for home Internet connections).

This feat was achieved using the already existing fiber optic infrastructure (but with some advanced add-ons). The research team used four “cores”, which are glass tubes placed inside the fibers that transmit data, rather than a traditional core. The signals are then split into several wavelengths that are transmitted simultaneously, using a technique known as wavelength division multiplexing (WDM). To carry more data, the researchers used a rare third “band” to extend the distance across several optical amplification techniques.

The new system starts transmission with a 552-channel comb laser fired at different wavelengths. This is then transmitted by double-polarization modulation, with some wavelengths going before the others, to generate multiple signal sequences – each in turn routed to one of the four cores inside the optical fiber. Data sent through this system travels over 43.5 miles (70 km) of optical fiber, until it reaches optical amplifiers to boost the signal for its long journey. But there’s more complexity: the signal passes through two new types of fiber amplifiers, one doped in tullium and one in erbium, before continuing its way, in a traditional process called Raman amplificatio.

Next, the signal sequence is sent to another part of the optical fiber, and the whole process is then repeated, allowing the researchers to send data over an amazing distance of 1,864.7 miles (3,001 km). The new quad-core optical fiber has the same diameter as the traditional single-core fiber, in other words, the integration of the new method into the existing infrastructure will be much simpler than other technological reforms of community information systems.