Feeds

NEC claims terabit-plus record with 10,000 km hop

High capacity for oceanic links

Maximizing your infrastructure through virtualization

NEC has demonstrated a single fibre link – with no repeaters – running at 1.5 terabits per second over 10,000 km. The company says this is the first time that a single laser source has sent a terabit channel over such a distance.

The lab setup achieved an aggregate of 4 Tbps by binding four “superchannels” together using wavelength division multiplexing (WDM), with a spectral efficiency of 3.6 bits per second per Hertz.

The company says optical superchannels use OFDM (orthogonal frequency division multiplexing) to independently modulate phase-locked carriers. The spectral efficiency of such a setup allows each laser to deliver a higher data rate, NEC claimed.

This next bit is quite a mouthful: “optical multi-tone generation, large-core/ultra low-loss fiber, intradyne digital coherent detection, and digital equalization at higher oversampling, along with well-established technologies such as EDFAs and DP-QPSK modulation. The experiment yielded a 2-dB system margin above the hard decision FEC threshold without using processing-intensive MAP or MLSE algorithms.”

The result was published at the recent Asia Communications and Photonics conference in Shanghai.

Higher capacity on transoceanic links is particularly important for countries like Australia and New Zealand, for whom the “tyranny of distance” creates bottlenecks of speed, price and capacity on international connections. ®

The Power of One Infographic

More from The Register

next story
BBC goes offline in MASSIVE COCKUP: Stephen Fry partly muzzled
Auntie tight-lipped as major outage rolls on
There's NOTHING on TV in Europe – American video DOMINATES
Even France's mega subsidies don't stop US content onslaught
You! Pirate! Stop pirating, or we shall admonish you politely. Repeatedly, if necessary
And we shall go about telling people you smell. No, not really
Airbus promises Wi-Fi – yay – and 3D movies (meh) in new A330
If the person in front reclines their seat, this could get interesting
UK Parliament rubber-stamps EMERGENCY data grab 'n' keep bill
Just 49 MPs oppose Drip's rushed timetable
Want to beat Verizon's slow Netflix? Get a VPN
Exec finds stream speed climbs when smuggled out
Samsung threatens to cut ties with supplier over child labour allegations
Vows to uphold 'zero tolerance' policy on underage workers
Dude, you're getting a Dell – with BITCOIN: IT giant slurps cryptocash
1. Buy PC with Bitcoin. 2. Mine more coins. 3. Goto step 1
prev story

Whitepapers

Reducing security risks from open source software
Follow a few strategies and your organization can gain the full benefits of open source and the cloud without compromising the security of your applications.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
Application security programs and practises
Follow a few strategies and your organization can gain the full benefits of open source and the cloud without compromising the security of your applications.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Consolidation: the foundation for IT and business transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.