Featured Research

from universities, journals, and other organizations

Lucent Technologies' Experimental 'No-Fiber Optical Data Link' Sets World Record For Free-Space Info Transmission

Date:
November 19, 1998
Source:
Lucent Technologies (Bell Labs)
Summary:
Scientists and engineers from Bell Labs, the research and development arm of Lucent Technologies, have demonstrated an innovative "no-fiber optical data link" and set a world record -- transmitting 2.5 gigabits (billion bits) of information per second, error free, through 2.4 kilometers (1.5 miles) of free space (air).

MURRAY HILL, N.J. - Scientists and engineers from Bell Labs, the research and development arm of Lucent Technologies, have demonstrated an innovative "no-fiber optical data link" and set a world record -- transmitting 2.5 gigabits (billion bits) of information per second, error free, through 2.4 kilometers (1.5 miles) of free space (air).

Related Articles


Commercial wireless data links, using multiple transmitters, operate at up to only 622 megabits (million bits) per second.

Worldwide demand for communications services is growing rapidly, and a network of multi-gigabit free-space data links could provide a high-capacity alternative to microwave links, optical fiber, or cable systems in places where those technologies are impractical or prohibitively expensive.

The experimental Lucent technology was developed in Bell Labs Government Solutions business. It integrates two custom-built telescopes, manufactured by AstroTerra Corp. in collaboration with Lucent, with standard optical transmitters and receivers and a high-power optical amplifier. Data is sent, through the air, from the transmitting telescope to the receiving telescope and focused onto the core of an optical fiber using coupling optics within the second telescope.

The Lucent team worked with colleagues at AstroTerra to test the system prototype at AstroTerra's facility in San Diego, Calif., and the group presented its results in a technical paper last week at the Photonics East conference in Boston. Co-authors of the paper are Paul Szajowski, Gerald Nykolak, James Auborn, Herman Presby and G.E. Tourgee, of Bell Labs, and E. Korevaar, J. Schuster, and I.I. Kim, of AstroTerra.

"This test stands as a remarkable achievement in wireless data communication," said AstroTerra President Eric Korevaar. "It's a watershed event in free-space optical technology."

The test combined innovative high-speed optoelectronic equipment developed by Lucent Technologies with AstroTerra's multiple-transmitter laser communication technology.

"There are numerous applications for connecting multi-gigabit data and communications networks where fiber-optic cables are not available or practical," said Mike Geller, Chief Technical Officer of Lucent's Government Solutions business. "This technology is compatible with our optical and data networking equipment, so we can hook up asynchronous-transfer-mode equipment, Internet packet switching systems and routers and other kinds of equipment at each end.

"It isn't intended to replace fiber, but rather to complement it," he said. "It fits niche applications. Because it requires a clear line of sight there are some places it can't go that fiber can, and adverse weather conditions, like heavy fog and snow, can present problems."

Potential applications for high-bandwidth optical wireless links include campus environments, multiple-building occupancy in metropolitan areas, and temporary data links where environment and cost make fiber connections impractical.

"Without alternate network system technologies and delivery topologies, overall effective network speed will be reduced and frequent bottlenecks within networks will become more commonplace in the very near future," predicted Szajowski.

Future plans for the Lucent team call for the development of 10-gigabit data rates, transmission across greater link distances, and the integration of wavelength division multiplexing (WDM) technology, a method for increasing capacity by transmitting information over multiple wavelengths, or colors, of light.

Lucent Technologies designs, builds and delivers a wide range of public and private networks, communications systems and software, consumer and business telephone systems and microelectronics components. Bell Labs is the research and development arm for the company. Further information about the company is available at http://www.lucent.com.

AstroTerra Corp. manufactures a full line of optical wireless data communications equipment, from the economical TerraLink 1000 to the high-speed TerraLink 8-622. More information on AstroTerra is available at http://www.astroterra.com.


Story Source:

The above story is based on materials provided by Lucent Technologies (Bell Labs). Note: Materials may be edited for content and length.


Cite This Page:

Lucent Technologies (Bell Labs). "Lucent Technologies' Experimental 'No-Fiber Optical Data Link' Sets World Record For Free-Space Info Transmission." ScienceDaily. ScienceDaily, 19 November 1998. <www.sciencedaily.com/releases/1998/11/981119073442.htm>.
Lucent Technologies (Bell Labs). (1998, November 19). Lucent Technologies' Experimental 'No-Fiber Optical Data Link' Sets World Record For Free-Space Info Transmission. ScienceDaily. Retrieved December 22, 2014 from www.sciencedaily.com/releases/1998/11/981119073442.htm
Lucent Technologies (Bell Labs). "Lucent Technologies' Experimental 'No-Fiber Optical Data Link' Sets World Record For Free-Space Info Transmission." ScienceDaily. www.sciencedaily.com/releases/1998/11/981119073442.htm (accessed December 22, 2014).

Share This


More From ScienceDaily



More Computers & Math News

Monday, December 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Can Bitcoin Survive 2015?

Can Bitcoin Survive 2015?

Newsy (Dec. 22, 2014) Bitcoin's stock has tumbled significantly this year, but more companies now accept it, leading supporters and critics alike to weigh in on its future. Video provided by Newsy
Powered by NewsLook.com
Touch-Free Smart Phone Empowers Mobility-Impaired

Touch-Free Smart Phone Empowers Mobility-Impaired

Reuters - Innovations Video Online (Dec. 21, 2014) A touch-free phone developed in Israel enables the mobility-impaired to operate smart phones with just a movement of the head. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Building Google Into Cars

Building Google Into Cars

Reuters - Business Video Online (Dec. 19, 2014) Google's next Android version could become the standard that'll power your vehicle's entertainment and navigation features, Reuters has learned. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
After Sony Hack, What's Next?

After Sony Hack, What's Next?

Reuters - US Online Video (Dec. 19, 2014) The hacking attack on Sony Pictures has U.S. government officials weighing their response to the cyber-attack. Linda So reports. Video provided by Reuters
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