German telecoms giant Deutsche Telekom (DT) has announced that researchers at its Telekom Innovation Laboratories (T-Labs) have realised a 512Gbps transmission over a single fibre-optic wavelength channel, which the company claims has broken the transmission speed record. The signals were sent over a distance of 734km from Berlin to Hanover and back again. DT said the usable bit rate was 400Gbps, around four times faster than current top speeds. ‘Together with our technology partner Alcatel-Lucent and the experts at Telekom Network Production, we are very proud of having attained this tremendous transmission performance over the internet under real-world conditions,’ commented T-Labs manager Heinrich Arnold, adding: ‘With them, we have successfully developed an innovative method by which the transmission capacity of optical fibre can be increased significantly in network operation.’

Source: TeleGeography.