Fibre link handles record optical transmission

Alcatel and partners today announced the successful completion of a field trial achieving a Terabit per second transmission over a fibre link in France Telecom’s network.

Alcatel today announced that it, along with France Telecom and Deutsche Telekom, recently completed a successful field trial achieving a Terabit per second transmission over an existing fibre link in France Telecom’s network.

This trial was conducted under the framework of the TOPRATE European research project, which began in 2001. The goal of this research project is to investigate advanced ultra-high channel bit rate transmission technologies (170 Gbit/s or more per channel) and to demonstrate Terabit per second (1000 Gigabits per second) network transmission capacity over installed fibre infrastructure.

The trial announced today resulted in a point-to-point DWDM (Dense Wavelength Division Multiplexing) transmission of 1.28 Terabits per second over a 430km standard (ITU-T G.652) single mode fibre link in France Telecom’s network in the Marseille area.

Test results were achieved using eight densely packed optical transmission channels, each carrying a record bit rate of 170 Gbit/s (160 Gbit/s plus an overhead so as to allow bit error detection and correction). This channel bit rate is 16 times higher than the 10 Gbit/s channel bit rate of current standard DWDM transmission products. Each 160 Gbit/s transmission channel could transport the content of four DVDs in about one second.

The TOPRATE field trial demonstrated that the severe sensitivity to transmission impairments associated with ultra-high channel bit rates can be managed over long distances. The trial also demonstrated that traditional single-mode fibre can handle a further increase of channel data rates to be used by the next generations of metro/core transmission equipment.