iXBT Labs - Computer Hardware in Detail






News Archive

 « Previous Day News Archive Next Day » 


Lucent Technologies' Bell Labs Demonstrates First Transmission of 100 Gb/s Ethernet-over-optical

RightMark 3DSound has been updated to the version 2.1

Lucent Technologies' Bell Labs Demonstrates First Transmission of 100 Gb/s Ethernet-over-optical

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

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.

Source: Lucent Technologies

RightMark 3DSound has been updated to the version 2.1

Updates are mainly related to the CPU utilization test:

  • Implemented the new, more comfortable GUI;
  • Added 3 methods of CPU load calculation (CPU-specific PCM, idle thread, NT system info);
  • Added the deferred mode (only for DirectSound API);
  • Added ASIO support;
  • Reduced the program size;
  • Made minor impovement of the DataAnalyzer GUI;
  • Updated User's Guide.

The new version is available for downloading here. Your comments and ideas are welcome.

 « Previous Day News Archive Next Day » 

Write a comment below. No registration needed!

blog comments powered by Disqus

  Most Popular Reviews More    RSS  

AMD Phenom II X4 955, Phenom II X4 960T, Phenom II X6 1075T, and Intel Pentium G2120, Core i3-3220, Core i5-3330 Processors

Comparing old, cheap solutions from AMD with new, budget offerings from Intel.
February 1, 2013 · Processor Roundups

Inno3D GeForce GTX 670 iChill, Inno3D GeForce GTX 660 Ti Graphics Cards

A couple of mid-range adapters with original cooling systems.
January 30, 2013 · Video cards: NVIDIA GPUs

Creative Sound Blaster X-Fi Surround 5.1

An external X-Fi solution in tests.
September 9, 2008 · Sound Cards

AMD FX-8350 Processor

The first worthwhile Piledriver CPU.
September 11, 2012 · Processors: AMD

Consumed Power, Energy Consumption: Ivy Bridge vs. Sandy Bridge

Trying out the new method.
September 18, 2012 · Processors: Intel
  Latest Reviews More    RSS  

i3DSpeed, September 2013

Retested all graphics cards with the new drivers.
Oct 18, 2013 · 3Digests

i3DSpeed, August 2013

Added new benchmarks: BioShock Infinite and Metro: Last Light.
Sep 06, 2013 · 3Digests

i3DSpeed, July 2013

Added the test results of NVIDIA GeForce GTX 760 and AMD Radeon HD 7730.
Aug 05, 2013 · 3Digests

Gainward GeForce GTX 650 Ti BOOST 2GB Golden Sample Graphics Card

An excellent hybrid of GeForce GTX 650 Ti and GeForce GTX 660.
Jun 24, 2013 · Video cards: NVIDIA GPUs

i3DSpeed, May 2013

Added the test results of NVIDIA GeForce GTX 770/780.
Jun 03, 2013 · 3Digests
  Latest News More    RSS  

Platform  ·  Video  ·  Multimedia  ·  Mobile  ·  Other  ||  About us & Privacy policy  ·  Twitter  ·  Facebook

Copyright © Byrds Research & Publishing, Ltd., 1997–2011. All rights reserved.