Set a new record for fiber data transmission speed

Researchers from the NICT Network System Research Institute and Fujikura Ltd, whose specialists have developed a new type of three-mode (three-channel) optical fiber, conducted an experiment, during which an information transfer rate of 159 terabits per second was achieved over a distance of 1045 kilometers. Under normal circumstances, delays with multimode fiber make it difficult to simultaneously receive high transmission rates and transmit over long distances. And this achievement is a kind of demonstration of a new method of overcoming limitations.

In order to achieve such a high transfer rate, the researchers used a light source that produces an optical comb with 348 peaks, i.e. with 348 fixed wavelengths. The transmission used the technology of multiplexing the signal, modulated using high-density multilayer amplitude-quadrature modulation 16-QAM. And the use of MIMO (multiple-input and multiple-output) technology has made it possible to restore the original sequence of data packets that passed through a 1000-kilometer distance with various delays.

The fiber developed by Fujikura Ltd has a standard diameter of 0.125 mm, making it compatible with most modern communication equipment. Nevertheless, the new data transmission technology is still at the very early stage of its development and it may take quite a long time before its practical application.

Japanese researchers intend to continue to research and develop further the optical communication technologies they have developed and create next-generation communication equipment that fully exploits the potential of these technologies. And, it is likely that in the future, on the basis of these technologies, Big Data processing systems, 5G mobile networks and other systems that require high speeds when transferring data over long distances will function

. Source: www.dailytechinfo.org