400 Tbps: Scientist set new world record for data transfer speed over conventional cable

An international group of scientists, led by British colleagues, has set a new record for data transmission speed over standard optical fiber. Previously, they achieved data transmission at 302 terabits per second (Tbps), whereas the new milestone has been recorded at 402 Tbps.

Significantly, this achievement utilized commercially available fiber for the experiment, promising to boost the speed of existing networks.

Despite substantial progress in optical communication, demands for bandwidth continue to rise from companies, governments, and everyday citizens. Addressing this challenge requires financial investment, but the researchers' proposal aims to increase bandwidth without the need for infrastructure changes. New equipment for data transmission and reception will be required, but this approach is considerably less costly than laying new optical transmission lines.

The study, conducted by researchers from Aston University, Japan's National Institute of Information and Communications Technology (NICT), and Nokia Bell Labs in the United States, focuses on expanding data transmission ranges.

Traditionally, optical fiber operated in the C and L wavelength bands. Researchers then added the E and S bands to service. In their latest work, they introduced two additional bands—O and U. Implementing the U band proved most challenging, as suitable receivers and transmitters were not commercially available. Consequently, British scientists had to independently develop and manufacture this equipment.

Dr. Phillips from Aston University said: "This breakthrough could significantly enhance the bandwidth of single optical fibers, contributing to the creation of more productive global systems. The newly developed technology is expected to substantially expand the bandwidth of optical communication infrastructure, meeting the growing demand for future data transmission services."