Japanese researchers achieve speed of 319Tbit/s over 3001km via fiber

Researchers at the Japanese National IT Institute have established a new internet speed record using fiber optics. At long-distance 319Tbit/s transmission was obtained by the researchers.

The previous world record of 178Tbit/s was set by British and Japanese researchers last year but has been nearly doubled by NICT employees from Japan. Researchers have utilized a four-core and 0.125 mm diameter optical fiber cable. The transmission bandwidth was greater than 319Tbit/s. Based on wavelength division multiplexing (combining multiple optical channels on a single fiber optic cable). 

An S-band was also employed by the researchers who last year recorded 178Tbit/s although at just 40 kilometers away. NICT records of 319Tbit/s were reached over an extensive 3001-kilometer span. They state that over this distance they did not measure signal loss or delays in speed. According to NICT, theoretically, a normal fiber infrastructure can be compatible with the technology employed, but the modification of such a network would first be required.