Alcatel meldt ons dat ze een nieuw wereldrecord hebben gevestigd wat betreft optische gegevens uitzending. Hierdoor kan een glasvezelkabel 5120 Gbit/s overbrengen naar een locatie 300 km verder. Deze informatie is verdeeld over 128 kanalen van 40 Gbit/s, wat het totaal ongeveer vergelijkbaar maakt met zo'n 640.000 ADSL-verbindingen:
Alcatel, the world leader in optical networking, today announced that it has set a new world record for DWDM (Dense Wavelength Division Multiplexing) transmission capacity over backbone networks. The company has achieved a unidirectional transmission of 128 channels each modulated at 40Gbit/s, reaching a total throughput of 5.12Tbit/s (5,120Gbit/s) over 300 km. This result was achieved with three technologies developed by Alcatel : 40Gbit/s DWDM systems, an innovating technique to make the most of existing bandwidth, and TeraLightTM optical fibers. This demonstration once again highlights the technological leadership of Alcatel in 40Gbit/s DWDM systems as well as the unequalled potential of the commercially available TeraLightTM fiber for 2.5, 10 and 40Gbit/s transmission.
This breakthrough transmission would allow for the transport of 640,000 simultaneous high-bit rate ADSL Internet lines or over 100 million simultaneous voice calls on a single optical fiber. It will allow operators and service providers to dramatically increase in the future the capacity transported over a single fiber, thus further optimizing the cost of their networks.[break]De nieuwe technologie zorgt ervoor dat de golflengtes in een glasvezelkabel minder snel "botsen". Hierdoor kan informatie sneller achter elkaar verzonden worden, wat uiteraard voor hogere snelheden zorgt. Het systeem lijkt goed in elkaar te steken, dus misschien zal in de komende jaren de snelheid van ons internet behoorlijk opgekrikt kunnen worden:[/break]To achieve such a performance, Alcatel has developed a new technique to optimally use the bandwidth of optical amplifiers. When carried over an optical fiber, wavelengths generate interferences. It is therefore necessary to have a minimum spacing between each wavelength in the networks, which limits the number of wavelengths that can be transported over the same fiber. The higher the bit rate, the stronger the interferences and the more limited the number of wavelengths.
The innovating technique developed by Alcatel allows to minimize the effect of these interferences and to pack an unprecedented number of DWDM 40Gbit/s channels on a single fiber, thus reaching the world record capacity of 5.12Tbit/s.