• Germany's news in English

Karlsruhe scientists transfer 700 DVDs of data in one second

The Local · 24 May 2011, 10:06

Published: 24 May 2011 08:21 GMT+02:00
Updated: 24 May 2011 10:06 GMT+02:00

Facebook Twitter Google+ reddit

The scientists at the Karlsruhe Institute of Technology (KIT) said this week they had broken the world record by sending data at a speed of 26 terabits per second.

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.

Story continues below…

"Our results prove that the physical limits for even extremely high data rates have not yet been reached," said Leuthold.

AFP/The Local/mry

The Local (news@thelocal.de)

Facebook Twitter Google+ reddit

Your comments about this article

08:51 May 24, 2011 by authun
Not sure the sending is so newsworthy as the receiving.
10:29 May 24, 2011 by anurag_bagaria
Wow! That's certainly a great job. Wunderbar!
11:10 May 24, 2011 by iseedaftpeople
well that is certainly impressive.

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.
13:12 May 24, 2011 by twisted
Truly impressive. My questions are will existing cabling (assuming fiberglass) carry this kind of speed or will new cabling be required? Will such technology only be used for mainline cables or will such speedy downloads eventually be usable by the home consumer?
17:05 May 24, 2011 by zeddriver
While that is great. It would be nice if the German internet providers would be more aggressive in getting Germany hook up to any kind of high speed connection.

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
17:57 May 24, 2011 by Sastry.M
It is indeed possible to overcome difficulties with continuing efforts. Even if we view philosophically 'orthogonality' represents a quadrature shift tied up to a single origin but presented as a duality of 'subject-object' relationship. Frequency relates to rate of activity per second and a laser beam is an electro-magnetic state of activity with predictable or defined coherence of phased actions.Now scientists seem to have succeeded in splitting a single coherent beam of light into many mutually defined orthogonal planes of activity and each such activity is made to carry information in a digitized format such that the total number of bytes contained in 700 dvd's could be transferred in one second. According to Indian Advaita ( Monistic) Philosophy the single origin to all activities whether coherent or random is the fundamental basis and randomness is the characteristic of multifarious phenomenal activities which can only be realized by coherent pursuits in a scientific manner in physical world and Yogic practices in the spiritual realm.
19:40 May 24, 2011 by auniquecorn
Karlsruhe scientists transfer 700 DVDs of data in one second.

(And bragging about it)

if I transfer 1gb, I get arrested, Go figure.
22:04 May 24, 2011 by Jack Kerouac

They just impressively transfered some computer data...
23:16 May 24, 2011 by rfwilson
So, exactly HOW can they "divide a laser beam into separate colour streams", when any laser is by definition, monochromatic. The entire operating principle of a laser is that it produces a single pure colour. Sounds like a typical example of a non-technical person, reporting on a technical subject!
05:43 May 25, 2011 by auniquecorn
I think its called, Googled, copied and pasted. from some really out there science journel.
13:52 May 26, 2011 by igotsix
@rfwilson: I think orthogonal has to do with the polarization or phase shifting of the light, not the frequency. Like n a 3d movie where there are two "signals" coming off the screen, one for each eye. The polarized glasses you wear filter the data. There would be multiple planes of light in the laser beam, but definitely not separate colors.

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!
14:19 May 26, 2011 by qube2

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...
15:53 May 27, 2011 by electric38
Countries that are moving towards moving a significant portion of their virtual learning will be highly interested in this development. The attempt to open up the multi-lingual field for those in remote areas can be done with confidence. The transfer of digital books will be made easier, especially audio based books for the sight impaired.

Having the return input from those who benefit should help the strength of this idea in a significant way. Keep up the good work!
21:11 May 28, 2011 by JBlooze
@qube2 - somebody's touchy....
Today's headlines
Creepy clown scare spreads to Germany
Two of the clowns were apparently equipped with chainsaws. Photo: Pedro Pardo / AFP file picture

Police said Friday five incidents involving so-called scary clowns had occurred in two north German town, including one assailant who hit a man with a baseball bat, amid fears that Halloween could spark a rash of similar attacks.

Student fined for spying on women via their webcams
Photo: DPA

Student from Munich fined €1,000 for spying on 32 different computers, using their webcams to take photographs, or record their keyboard history.

This is how much startup geeks earn in Germany
Photo: DPA

A comprehensive new survey of 143 startup founders shows how much you are likely to be earning at a German startup, from entry level all the way up to sitting on the board.

Man dies after beating for peeing near Freiburg church
The Johannes Church in Freiburg. Photo Jörgens Mi/Wikipedia

A middle-aged man from southern Germany has died after being attacked by a group of men who took umbrage with the fact he was urinating in the vicinity of a church.

The Local List
Seven German celebrities with uncanny doppelgängers
Former Berlin mayor Klaus Wowereit and actor Alec Baldwin. Photo: DPA; Gage Skidmore, Wikimedia Commons

Check out these seven look-a-likes of well known German figures - we admit that some are more tenuous than others...

Israel seeks to buy three new German submarines: report
A Dolphin class submarine. Photo: DPA

Israel is seeking to buy three more advanced submarines from Germany at a combined price of €1.2 billion, an Israeli newspaper reported Friday.

Here’s where people live the longest in Germany
Photo: DPA

Germans down south seem to know the secret to a long life.

More Germans identify as LGBT than in rest of Europe
Photo: DPA

The percentage of the German population which identifies as lesbian, gay, bisexual or transgender is higher than anywhere else in Europe, according to a new study.

'Reichsbürger' pair attack police in Saxony-Anhalt
File photo: DPA.

A "Reichsbürger" and his wife attacked police officers on Thursday, just a day after another Reichsbürger fatally shot an officer in Bavaria.

Five things not to miss at the Frankfurt Book Fair
Photo: DPA

From consulting a book doctor to immersing yourself in an author's world with the help of virtual reality, here are five things not to miss at this week's Frankfurt Book Fair, the world's largest publishing event.

Sponsored Article
How to vote absentee from abroad in the US elections
10 things you never knew about socialist East Germany
Sponsored Article
Last chance to vote absentee in the US elections
How Germans fell in love with America's favourite squash
How I ditched London for Berlin and became a published author
Sponsored Article
How to vote absentee from abroad in the US elections
12 clever German idioms that'll make you sound like a pro
23 fascinating facts you never knew about Berlin
9 unmissable events to check out in Germany this October
10 things you never knew about German reunification
10 things you're sure to notice after an Oktoberfest visit
Germany's 10 most Instagram-able places
15 pics that prove Germany is absolutely enchanting in autumn
10 German films you have to watch before you die
6 things about Munich that’ll stay with you forever
10 pieces of German slang you'll never learn in class
Ouch! Naked swimmer hospitalized after angler hooks his penis
Six reasons why Berlin is now known as 'the failed city'
15 tell-tale signs you’ll never quite master German
7 American habits that make Germans very, very uncomfortable
Story of a fugitive cow who outwitted police for weeks before capture
Eleven famous Germans with surnames that'll make your sides split
The best ways to get a visa as an American in Germany
jobs available
Toytown Germany
Germany's English-speaking crowd