Feeds

Bell Labs sets distance record for optical transmissions

2.56Tbps over 4,000km

  • alert
  • submit to reddit

Internet Security Threat Report 2014

Boffins at Bell Labs, the research and development arm of Lucent Technologies, have doubled the distance record for high-bandwidth, ultra long-distance transmission by sending 2.56 terabits of information per second over a distance 4,000km.

The previous transmission record was 1.60 terabits of information per second over 2,000 km.

The transmission record was achieved using a 64-channel dense wavelength division multiplexing (DWDM) system, where each channel carried information at 40 gigabits per second. DWDM makes it possible to send multiple streams of information down the same optical fibre, using different wavelengths of light.

The increase in speed was achieved using a new coding scheme for high-capacity communications, called differential phase shift keying (DPSK), which was developed by Bell Labs. When coupled with other leading-edge Bell Labs technologies - such as extended L-band amplifiers, Raman amplifiers, forward error correction and optimal dispersion compensation - DPSK allowed boffins to achieve error-free transmission over 4,000 km.

Tim Sullivan, president of Lucent's optical networking group, said that the breakthrough in transmission speeds will ultimately enable lower capital and operational costs for carriers.

A technical paper detailing the advance was presented last week at the Optical Fibre Communications (OFC) conference in Anaheim, California.

This long-distance transmission advance comes after the recent introduction of Lucent's LambdaXtreme Transport optical networking system, which is being field tested by Deutsche Telekom and is generally available to customers. The LambdaXtreme Transport was the first system to enable transmission speeds of up to 40Gbps over at distance up to 1,000km.

Disappointing sales of its earlier generation of 10Gbps optical kit a significant factor in Lucent's recent poor financial performance. It hopes 40Gbps kit will prove to be an attractive proposition for its cash strapped telecoms customers. ®

Related stories

Routers 'best platform for WAN connectivity'
Optical transport market in decline
Nortel touts the light fantastic
Deutsche Telekom takes 40Gbps kit for a spin
Intel buys optical networking trio

Internet Security Threat Report 2014

More from The Register

next story
Docker's app containers are coming to Windows Server, says Microsoft
MS chases app deployment speeds already enjoyed by Linux devs
IBM storage revenues sink: 'We are disappointed,' says CEO
Time to put the storage biz up for sale?
'Hmm, why CAN'T I run a water pipe through that rack of media servers?'
Leaving Las Vegas for Armenia kludging and Dubai dune bashing
'Urika': Cray unveils new 1,500-core big data crunching monster
6TB of DRAM, 38TB of SSD flash and 120TB of disk storage
Facebook slurps 'paste sites' for STOLEN passwords, sprinkles on hash and salt
Zuck's ad empire DOESN'T see details in plain text. Phew!
SDI wars: WTF is software defined infrastructure?
This time we play for ALL the marbles
Windows 10: Forget Cloudobile, put Security and Privacy First
But - dammit - It would be insane to say 'don't collect, because NSA'
prev story

Whitepapers

Forging a new future with identity relationship management
Learn about ForgeRock's next generation IRM platform and how it is designed to empower CEOS's and enterprises to engage with consumers.
Cloud and hybrid-cloud data protection for VMware
Learn how quick and easy it is to configure backups and perform restores for VMware environments.
Three 1TB solid state scorchers up for grabs
Big SSDs can be expensive but think big and think free because you could be the lucky winner of one of three 1TB Samsung SSD 840 EVO drives that we’re giving away worth over £300 apiece.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.