The new record is almost double the previous one - last year the data transfer speed reached 178 Tb/s.
Researchers from the National Instituteinformation and communication technologies have made a breakthrough by modernizing the existing fiber-optic infrastructure and applying new signal transmission technology. They used cables with four cores instead of the standard single ones, and also split each signal into several wavelengths transmitted simultaneously.
Unlike the standard transmission scheme, whenonly one core is used to transmit information, the technology implies the simultaneous use of 4 cores at once. The original signal is transmitted in parts using wavelength division multiplexing. The engineers also provided for the addition of a "third band" and equipment for optical amplification of signals for the greatest possible transmission distance. The transmitting device is a laser that forms 522 channels of different wavelengths. Then, the signal is modulated, processed and fed into the line.
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