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Karlsruhe scientists transfer 700 DVDs of data in one second
Published: 24 May 11 08:21 CET | Print version
Updated: 24 May 11 10:06 CET
Online: http://www.thelocal.de/sci-tech/20110524-35209.html
Computer users who despair over slow internet connections should take heart - German scientists have broken a speed record, sending 700 DVDs' worth of data via a single laser beam, in one second.
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The data, sent over 50 kilometres (31 miles) on a single laser beam, was coded using a system known as orthogonal frequency-division multiplexing (OFDM) in which the laser beam is divided into separate colour streams.
"With 26 terabits per second, you can simultaneously transmit up to 400 million telephone calls per second," Prof. Jürg Leuthold from KIT said in a statement.
“A few years ago, data rates of 26 terabits per second were deemed utopian even for systems with many lasers, and there would not have been any applications,” he said.
The scientists will now concentrate their efforts on developing systems capable of transmitting between 400 gigabits to 1 terabit per second.
"Our results prove that the physical limits for even extremely high data rates have not yet been reached," said Leuthold.
AFP/The Local/mry
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Your comments about this article:
It still blows my mind sometimes how bandwidth and transfer speed have increased over the last 10 to 15 years. When I was in college and my dorm was finally hooked up to the university's high speed network, I remember us staring in awe at the screen, seeing download rates of 5 Mbps. We felt privileged. And nowadays, a 16 Mpbs DSL line for home use will only cost you between 30 and 40 euros a month.
Fascinating how technology has advanced, although I am not quite sure I can see any applications that would necessitate 26 terabits of bandwidth...yet. Maybe as a super-fast backbone.
I live only 5 miles from a city of 100,000 and we can only get 256k hookup.
In America it's hard to find a place that does not have high speed internet
(And bragging about it)
if I transfer 1gb, I get arrested, Go figure.
They just impressively transfered some computer data...
They encode and decode the OFDM data at that speed? There are so many other factors to this. Sure, the data went over the laser beam at that speed. But first it had to be read of off some device into RAM. I think DDR SDRAM has a maximum transfer rate of 1600 MB/s, but that could be outdated. This laser transerred 700,000 MB/s. The rest of the equipment used in this test must be very impressive to be able to measure and handle that transfer rate!
The loser definition of the term laser describes the process of stimulated emission. Despite the idea of temporal coherence implying monochromatic light, there are lasers that emit a broad spectrum of light, or different wave lengths of light simultaneously.
Now what did you say? Ah yes, your post sounds like a typical example of a non-technical....blah...blah...
Having the return input from those who benefit should help the strength of this idea in a significant way. Keep up the good work!