Wednesday, May 25, 2011

Data Transfer Through Laser Faster

The researchers recorded a new record for data transfer using a laser with a speed of 26 terabits per second. With speed like that, all library collections of the U.S. Congress can be transmitted by fiber optics in 10 seconds.

The way used is the so-called fast Fourier transform (fast Fourier transform) to record more than 300 different colors of light in lasesr rays, each carrying its own information.

Various efforts to improve the speed of data transfer is increased in recent years by using light-based communication technologies. Previous technology using optical fiber as the Wiggles record data by using one color of light that transmit optical fiber.

The new approach was then performed using a number of other ways to increase the speed of data transmission. A number of measures that included what is called the use of orthogonal frequency (orthogonal frequency division multiplexing).

This method uses a number of different data with different light colors, and everything is sent via optical fiber simultaneously. The recipient uses a laser device to capture this light signal.

Wolfgang Freude, researcher with the transfer of data from the Institute of Technology in Karlsruhe, Germany, said the trials with higher speed as well they have done. "Experiments with 100 terabits per second has been done," said Freude told the BBC.

"The problem is sending this data requires not only a laser but the laser 370, and it was very expensive. So you can imagine, requires some 370 kilowatt laser power," he added. For that reason, Profeser Freude and colleagues studied how to send data by using only one laser.

Last year, Professor Freude shows the steps to transfer data at 10 terabits per second. Freude recognize how that is done today is more complicated but he believes this step can be used as demand for faster transmission of data triggers a variety of innovations.

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