Sunday, December 21, 2014
Search
  
Submit your own News for
inclusion in our Site.
Click here...
Breaking News
Samsung Introduces SE790C Curved Monitor
Chinese Motion-sensing VR Glasses Coming On Kickstarter
Kodak Returns To CES With Consumer Product Line
North Korea Suggests Joint Inverstigation With U.S. Over Sony Hacking
T-Mobile to Pay $90 Million To Settle Case With FCC
New Trojan Targetted Banks Wordlwide
FBI Confirms North Korea Was Behind Sony Hack
Apple Responds To BBC's Allegations Over Working Conditions In Chinese Factory
Active Discussions
Digital Audio Extraction and Plextools
Will there be any trade in scheme for the coming PSP Go?
Hello, Glad to be Aboard!!!
Best optical drive for ripping CD's? My LG 4163B is mediocre.
Hi All!
cdrw trouble
CDR for car Sat Nav
DVD/DL for Optiarc 7191S at 8X
 Home > News > General Computing > NEC Dem...
Last 7 Days News : SU MO TU WE TH FR SA All News

Wednesday, January 11, 2012
NEC Demonstrates Terabit/s Superchannel Transmission over 10,000km


NEC has announced the successful experimental demonstration of 1.15-Tb/s ultra-long haul optical transmission over 10,000 kilometers using optical superchannel technology.

This is the first instance that a terabit/s channel generated from a single laser source has been transmitted over such a distance. Four superchannels were transmitted together by wavelength division multiplexing (WDM) to achieve a total capacity of 4 Tb/s and a spectral efficiency of 3.6 b/s/Hz. The results demonstrate that practical high-capacity transmission for transoceanic communication can be achieved using the superchannel technology.

Optical superchannels allow phase-locked carriers with independent modulation to overlap in frequency following the principles of orthogonal frequency division multiplexing (OFDM). This enables efficient bandwidth utilization, allowing higher spectral efficiency and higher data rate per laser through parallelization. NEC's system uses hardware and advanced techniques, including 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. NEC said that its experiment yielded a 2-dB system margin above the hard decision FEC threshold without using processing-intensive MAP or MLSE algorithms.

"This success is another example of NEC's continuing leadership in high capacity, long distance optical communication technologies, following its record achievements of 101.7 Tb/s per fiber for single core fiber transmission, the first terabit field trial with coexisting 100G, 450G and 1T signals on the same fiber, and the highest order QAM optical transmission of 1024QAM" confirmed Dr. Yasuhiro Aoki, General Manager for NEC's Submarine Network business.


Previous
Next
Apple Confirms Anobit Acquisition        All News        Kingston Offers Memory Solutions for Ultrabooks, New Wi-drive And USB Flash Drives at CES
Apple Confirms Anobit Acquisition     General Computing News      Mozilla To Deliver Firefox Extended Support Release

Get RSS feed Easy Print E-Mail this Message

Related News
NEC Develops Ultra-sensitive Terahertz Camera
NEC Technology Detects Counterfeit Products
Microsoft Releases New Kinect SDK And Adapter Kit
NEC Technology Helps Take Less Stressful Blood Pressure Measurements
Samsung, Intel, Dell, Boradcom Team Up On Standards For Internet of Things
NEC Releases Face-authentication Software For PCs
Microsoft Reveals Kinect for Windows v2
Kinect for Windows SDK 1.8 Available
NEC Display Introduces 19-inch AccuSync Desktop Monitor with IPS Panel
NEC To Stop Making Smartphones
Researchers Use Kinect As Digital Assistance To Sign-Language Users
NEC to Exit Smartphone biz: report

Most Popular News
 
Home | News | All News | Reviews | Articles | Guides | Download | Expert Area | Forum | Site Info
Site best viewed at 1024x768+ - CDRINFO.COM 1998-2014 - All rights reserved -
Privacy policy - Contact Us .