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Scientists have overcome the barrier of 400 Tbit/s in the transmission of data by ordinary optical fiber

    A record speed of data transmission by optical fiber cable was achieved.

    An international group of researchers reported achieving a new record for the speed of data transmission by a conventional fiber optic cable. As noted by the National Institute of Information and Communication Technologies of Japan, scientists managed to achieve a speed of 402 Tbit/s, which is 25% higher than the previous record.

    The key success factor was the use of a new bandwidth of 37.6 THz. Engineers developed a dense wavelength multiplexed OU-band data transmission system using commercially available standard optical fiber and specialized amplifiers.

    The system is based on wavelength division multiplexing (WDM) technology and uses new spectral windows to expand bandwidth. This made it possible to provide more than 1,500 simultaneous transmission channels in a wide optical bandwidth of 37.6 THz (275 nm).

    To achieve this result, the researchers used six different options for amplifiers based on thulium fiber for O, E, S, C and L bands, as well as discrete (U-band) and distributed Raman amplification. In addition, new optical gain equalizers have been implemented for the O and E bands.

    The estimated data transfer speed after 50 km was a record 402 Tbit/s. The developers note that these results demonstrate the potential of ultra-broadband data transmission to significantly increase the bandwidth of existing communication systems.

    This achievement opens up new prospects for the development of telecommunication technologies and may have a significant impact on the future of data transmission, especially in the context of growing needs for high-speed Internet communication and processing of large volumes of information.

    It will be recalled that earlier Japanese scientists presented new microcircuits for data transmission at a speed of up to 640 Gbit/s