Featured Research

from universities, journals, and other organizations

New Speed Record For Reliable Reading Of Optical Data With Compact Ultra-fast Component May Help Improve Circuit Design

Date:
February 3, 2009
Source:
Optical Society of America
Summary:
Sliced light is how we communicate now. This slicing and dicing is generally done with an electro-optic modulator. Reading that fast data stream with a compact and reliable receiver is another matter. A new error-free speed-reading record using a compact ultra-fast component -- 640 Gbits/second (Gbps, or billion bits per second) -- has now been established.

Sliced light is how we communicate now. Millions of phone calls and cable television shows per second are dispatched through fibers in the form of digital zeros and ones formed by chopping laser pulses into bits. This slicing and dicing is generally done with an electro-optic modulator, a device for allowing an electric signal to switch a laser beam on and off at high speeds (the equivalent of putting your hand in front of a flashlight).

Related Articles


Reading that fast data stream with a compact and reliable receiver is another matter. A new error-free speed-reading record using a compact ultra-fast component—640 Gbits/second (Gbps, or billion bits per second)—has now been established by a collaboration of scientists from Denmark and Australia.

New technology and new ways of doing business require new approaches to old procedures. Conventional readers of optical data depend on photo-detectors, electronic devices that can operate up to approximately 40 Gbps. This in itself represents a great feat of rapid reading, but it's not good enough for the higher-rate data streams being designed now. The data receiving rate has to keep up.

Sometimes to speed up data transmission several signals are multiplexed: each, with its own stream of coded data, is sent down an optical fiber at the same time. In other words, 10 parallel streams of data could each be sent at a rate of 10 Gbps and then added up to an effective stream of 100 Gbps. At the receiving end the parallel signals have to be read out in a complementary de-multiplexing process. Reliable and fast multiplexing and de-multiplexing represent a major bottleneck in linking up the electronic and photonic worlds.

In 1998 researchers in Japan created a data stream as high as 640 Gbps and were able to read it back, but the read-out apparatus relied on long lengths of special optical fiber. This particular approach is somewhat unstable. The new de-multiplexing device demonstrated at the Technical University of Denmark, by contrast, can handle the high data rate, and can do so in a stable manner. Furthermore, instead of fibers 50 meters long, they accomplish their de-multiplexing of the data stream with a waveguide only 5 cm long, an innovation developed at the Centre for Ultrahigh Bandwidth Devices for Optical Systems, or CUDOS, in Australia. Another benefit of the new device with the compact size is the potential for integration with other components to create more advanced ultra-fast functional chips. The dynamics involved in the CUDOS device could even allow for still higher data rates approaching terabits/second (Tbps, or trillion bits per second).

One of the authors of the new report, Danish scientist Leif K. Oxenlψwe, says that the record speeds of de-multiplexing represented by his tiny glass microchip is a boon to circuit designers and opens the door to faster network speeds. In the near future, the Danish and Australian researchers hope to achieve 1 Tbps Ethernet capability.


Story Source:

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


Journal Reference:

  1. Leif Oxenlψwe et al. Breakthrough switching speed with an all-optical chalcogenide glass chip: 640 Gbit/s Demultiplexing. Optics Express, Vol. 17, Issue 4, Feb. 16, 2009

Cite This Page:

Optical Society of America. "New Speed Record For Reliable Reading Of Optical Data With Compact Ultra-fast Component May Help Improve Circuit Design." ScienceDaily. ScienceDaily, 3 February 2009. <www.sciencedaily.com/releases/2009/02/090202121038.htm>.
Optical Society of America. (2009, February 3). New Speed Record For Reliable Reading Of Optical Data With Compact Ultra-fast Component May Help Improve Circuit Design. ScienceDaily. Retrieved December 18, 2014 from www.sciencedaily.com/releases/2009/02/090202121038.htm
Optical Society of America. "New Speed Record For Reliable Reading Of Optical Data With Compact Ultra-fast Component May Help Improve Circuit Design." ScienceDaily. www.sciencedaily.com/releases/2009/02/090202121038.htm (accessed December 18, 2014).

Share This


More From ScienceDaily



More Computers & Math News

Thursday, December 18, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Navy Unveils Robot Fish

Navy Unveils Robot Fish

Reuters - Light News Video Online (Dec. 18, 2014) — The U.S. Navy unveils an underwater device that mimics the movement of a fish. Tara Cleary reports. Video provided by Reuters
Powered by NewsLook.com
How 2014 Shaped The Future Of The Internet

How 2014 Shaped The Future Of The Internet

Newsy (Dec. 18, 2014) — It has been a long, busy year for Net Neutrality. The stage is set for an expected landmark FCC decision sometime in 2015. Video provided by Newsy
Powered by NewsLook.com
White House: Sony Hack a 'serious National Security Matter'

White House: Sony Hack a 'serious National Security Matter'

AFP (Dec. 18, 2014) — White House spokesperson Josh Earnest says cyber attacks that ultimately prompted Sony Pictures to scrap the release of a madcap comedy about North Korea are a "serious national security matter." Duration: 00:35 Video provided by AFP
Powered by NewsLook.com
Google Maps Lets You Tour Street View in Virtual Reality

Google Maps Lets You Tour Street View in Virtual Reality

Buzz60 (Dec. 18, 2014) — Google Maps now lets Android users see cities on Street View in virtual reality with the special Cardboard feature. Sean Dowling (@Seandowlingtv) has the details. Video provided by Buzz60
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:

Strange & Offbeat Stories

 

Space & Time

Matter & Energy

Computers & Math

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