Thursday, July 24, 2014
Search
  
Submit your own News for
inclusion in our Site.
Click here...
Breaking News
Sony Settles 2011 PSN Hacking Case
Sony Xperia Z3 Specs Leaked
Swatch Denies Working with Apple on iWatch
Vuzix And Lenovo Launch M100 Smart Glasses Product
Google Implemented "Right To Be Forgotten" Ruling Inadequately, EC says
Researchers Create Ultra-dense Memory Using Conventional Methods
Facebook Profit Doubles
Qualcomm's Profit Hurt by Dispute Over China Royalties
Active Discussions
help questions structure DVDR
Made video, won't play back easily
Questions durability monitor LCD
Questions fungus CD/DVD Media, Some expert engineer in optical media can help me?
CD, DVD and Blu-ray burning for Android in development
IBM supercharges Power servers with graphics chips
Werner Vogels: four cloud computing trends for 2014
Video editing software.
 Home > News > General Computing > First 1...
Last 7 Days News : SU MO TU WE TH FR SA All News

Friday, September 30, 2005
First 100 Gb/s Transmission of Ethernet-over-optical


In two papers presented to the European Conference and Exhibition on Optical Communication (ECOC) in Scotland Wednesday, Lucent Technologies Bell Labs announced the first reported transmissions of 100 Gigabit per second (Gb/s) Ethernet over optical.

"This work is a major first. We have broken through the ceiling in transmission rates and described two techniques that could help implement 100G Ethernet over optical systems," said Martin Zirngibl, director, Bell Labs. "With more and more enterprises moving to 10Gb/s transmission, carriers are looking to implement 100Gb/s Ethernet in the Metro Area Network (MAN) as a way to efficiently multiplex and transmit high amounts of data in its native Ethernet format."

Today, Ethernet signals are transported over 10Gb/s and, occasionally, over 40Gb/s SONET connections. This Bell Labs work is aimed at producing 100Gb/s Ethernet-over-optical transmission.

The Bell Labs research team was able to deliver a 107 Gb/s optical data stream, representing 100 Gb/s of data transmission plus a standard 7 percent overhead for error correction, using the following two technological approaches:

- Duobinary Signaling: This technique uses three electrical signal levels, - positive, negative and zero - to represent a binary signal for communications transmission. Duobinary signals require less bandwidth than traditional NRZ (non-return to zero) signals. The application of this bandwidth-compressing format enabled the creation of an optical 107-Gb/s serial data stream using a commercially available optical modulator (rated for 40 Gb/s).

- Single-Chip Optical Equalizer: Integrated optical equalizers invented by Bell Labs researchers two years ago, can compensate for transmission impairments and also for the limited modulator bandwidth in a commercially available NRZ system. NRZ is the least complex optical data format to generate. In order to demonstrate an optical 107-Gb/s NRZ signal, Bell Labs designed a single chip optical equalizer that compensated for almost all inter-symbol interference arising from modulator bandwidth limitations in an optical 107 Gb/s NRZ electronic time division multiplexing (ETDM) transmitter.

As with the duobinary approach, Bell Labs researchers used a commercially available 40-Gb/s optical modulator in combination with the optical equalizer to generate a 107-Gb/s optical NRZ data stream.

The ECOC-submitted papers on both of these approaches are available upon request by sending an e-mail to pbenedict@lucent.com.


Previous
Next
Pioneer Unveils Future 3D User Interface        All News        Toshiba's 4GB Microdrive Gigashot V10 Camcorder
Pioneer Unveils Future 3D User Interface     General Computing News      Panasonic Helps Electric Outlet Go Broadband

Get RSS feed Easy Print E-Mail this Message

Related News
Alcatel-Lucent Achieves 10Gbps Data Transmission Over Traditional Copper Telephone Lines
Alcatel-Lucent and BT Achieve 1.4Tb/s Fiber Speeds
Alcatel-Lucent To support China Mobile' 4G Mobile Network
Wi-Fi Goes Mobile With Alcatel-Lucent
Lucent announces "InPhase Technologies" venture to develop holographic storage!

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 .