Featured Research

from universities, journals, and other organizations

Scientists develop device to enable improved global data transmission

Date:
November 7, 2010
Source:
University of Southampton
Summary:
Researchers have developed a new data transmission system that could substantially improve the transmission capacity and energy efficiency of the world's optical communication networks.

Researchers have developed a new data transmission system that could substantially improve the transmission capacity and energy efficiency of the world's optical communication networks.

Transmission of data through optical networks is currently limited by 'phase noise' from optical amplifiers and 'cross talk' induced by interaction of the signal with the many other signals (each at a different wavelength) simultaneously circulating through the network. 'Phase noise' is the rapid, short-term, random fluctuations in the phase of a signal, which affects the quality of the information sent and results in data transmission errors. 'Cross talk' refers to any signal unintentionally affecting another signal.

Now, researchers working on the EU-funded FP7 PHASORS project, led by the University of Southampton's Optoelectronics Research Centre (ORC), have announced a major advance in the potential elimination of this interference.

Traditionally optical data has been sent as a sequence of bits that were coded in the amplitude of the light beam, a system that was simple and practical but inefficient in its use of bandwidth. Until recent years, this wasn't a problem given the enormous data-carrying capacity of an optical fibre. However, the introduction of bandwidth-hungry video applications, such as YouTube, and the continued growth of the internet itself have led to increasing interest in finding more efficient data signalling formats -- in particular, schemes that code data in the phase rather than amplitude of an optical beam.

In a paper published in the journal Nature Photonics, scientists on the PHASORS project announced the development of the first practical phase sensitive amplifier and phase regenerator for high-speed binary phase encoded signals. This device, unlike others developed in the past, eliminates the phase noise directly without the need for conversion to an electronic signal, which would inevitably slow the speeds achievable.

The device takes an incoming noisy data signal and restores its quality by reducing the build up of phase noise and also any amplitude noise at the same time.

ORC Deputy Director and PHASORS Director, Professor David Richardson comments: "This result is an important first step towards the practical implementation of all-optical signal processing of phase encoded signals, which are now being exploited commercially due to their improved data carrying capacity relative to conventional amplitude coding schemes.

"Our regenerator can clean noise from incoming data signals and should allow for systems of extended physical length and capacity. In order to achieve this result, a major goal of the PHASORS project, has required significant advances in both optical fibre and semiconductor laser technology across the consortium. We believe this device and associated component technology will have significant applications across a range of disciplines beyond telecommunications -- including optical sensing, metrology, as well as many other basic test and measurement applications in science and engineering."

The PHASORS project, which started in 2008, was tasked with developing new technology and components to substantially improve the transmission capacity and energy efficiency of today's optical communication networks.

The project combines the world-leading expertise of research teams from the ORC, Chalmers University of Technology (Sweden), The Tyndall National Institute at University College Cork (Ireland), the National and Kapodestrian University of Athens (Greece), and leading industrial partners Onefive GmbH (Switzerland), Eblana Photonics (Ireland) and OFS (Denmark).


Story Source:

The above story is based on materials provided by University of Southampton. Note: Materials may be edited for content and length.


Journal Reference:

  1. Radan Slavík, Francesca Parmigiani, Joseph Kakande, Carl Lundström, Martin Sjödin, Peter A. Andrekson, Ruwan Weerasuriya, Stylianos Sygletos, Andrew D. Ellis, Lars Grüner-Nielsen, Dan Jakobsen, Søren Herstrøm, Richard Phelan, James O'Gorman, Adonis Bogris, Dimitris Syvridis, Sonali Dasgupta, Periklis Petropoulos, David J. Richardson. All-optical phase and amplitude regenerator for next-generation telecommunications systems. Nature Photonics, 2010; DOI: 10.1038/nphoton.2010.203

Cite This Page:

University of Southampton. "Scientists develop device to enable improved global data transmission." ScienceDaily. ScienceDaily, 7 November 2010. <www.sciencedaily.com/releases/2010/09/100907081645.htm>.
University of Southampton. (2010, November 7). Scientists develop device to enable improved global data transmission. ScienceDaily. Retrieved April 24, 2014 from www.sciencedaily.com/releases/2010/09/100907081645.htm
University of Southampton. "Scientists develop device to enable improved global data transmission." ScienceDaily. www.sciencedaily.com/releases/2010/09/100907081645.htm (accessed April 24, 2014).

Share This



More Computers & Math News

Thursday, April 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Monkeys Are Better At Math Than We Thought, Study Shows

Monkeys Are Better At Math Than We Thought, Study Shows

Newsy (Apr. 23, 2014) — A Harvard University study suggests monkeys can use symbols to perform basic math calculations. Video provided by Newsy
Powered by NewsLook.com
High Court to Hear Dispute of TV Over Internet

High Court to Hear Dispute of TV Over Internet

AP (Apr. 22, 2014) — The future of Aereo, an online service that provides over-the-air TV channels, hinges on a battle with broadcasters that goes before the U.S. Supreme Court on Tuesday. (April 22) Video provided by AP
Powered by NewsLook.com
Aereo Takes on Broadcast TV Titans in Supreme Court Today

Aereo Takes on Broadcast TV Titans in Supreme Court Today

TheStreet (Apr. 22, 2014) — Aereo heads to the Supreme Court today to fight for its right to stream broadcast TV over the Internet -- against broadcasters who say the start-up infringes upon copyright law. TheStreet Deputy Managing Editor Leon Lazaroff explains the importance of the case in the TV industry and details what the outcome of it could mean for broadcasters and for cloud storage services -- as Aereo allows its subscribers to not just watch live TV shows but also store content to a DVR in the cloud. Video provided by TheStreet
Powered by NewsLook.com
Lytro Introduces 'Illum,' A Professional Light-Field Camera

Lytro Introduces 'Illum,' A Professional Light-Field Camera

Newsy (Apr. 22, 2014) — The light-field photography engineers at Lytro unveiled their next innovation: a professional DSLR-like camera called "Illum." Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins