This equates to more than the total volume of global internet traffic that’s being sent every second, according to DTU. Although the distance is far from the longest, as a team of Japanese researchers have managed to transmit a 319 Terrabit per second datastream over a distance of 3,001 km (1,864 miles), although they used signal amplifiers every 70 km to reach this distance. The DTU team’s frequency comb was made by Chalmers University of Technology in Sweden and it breaks down the infrared laser that’s being used to transmit the data, into a rainbow spectrum, where each colour corresponds to a frequency equivalent. This allows multiple streams of data to be encoded with data, before being re-integrated and sent as a single infrared laser signal over the fibre. According to DTU, without the frequency comb, they would’ve needed more than a thousand lasers to achieve the same speeds using state-of-the-art commercial equipment. The team at DTU expects to be able to hit speeds of up to 100 Petabit per second in the future.