Scientists set new data speed record using single laser

A new data speed record set transmitting 26 terabits per second using a single laser.

Last Updated: May 23, 2011, 19:21 PM IST

Melbourne: A group of scientists has set a new data speed record transmitting 26 terabits- equivalent of 700 DVDs- per second using a single laser.

They said their discovery will not only help to fulfill the world`s burgeoning high-capacity bandwidth needs of cloud computing and 3D-high definition TV, but provide an environmentally-friendly way of transmitting data over long distances, reports ABC Science.

Earlier this year, Japanese scientists set a world record sending 109 terabits per second using multiple lasers.

But the date rate of 26 terabits per second accomplished by the group of German, Swiss and UK scientists is the largest line rate ever recorded using a single light source.

"Encoding 26 terabits of information per second on a single laser would until recently not only have been considered impossible, but unnecessary," said study co-author, Juerg Leuthold from the Karlsruhe Institute of Technology.

The scientists used a single laser to generate 325 optical frequencies within a narrow spectral band of laser wavelengths and transmitted the data over 50 kilometres of single-mode fibre.

They did this using a technique known as orthogonal frequency-division multiplexing (OFDM) that relies on mathematical routines to generate and decode data.

The discovery was published in recent Nature Photonics.