Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Stevens faculty release study on free-space optical communication in Optics Express

19.03.2009
Paper shows experimental evidence of a unique atmospheric effect

Three members of the faculty at Stevens Institute of Technology recently collaborated on a paper focusing on free-space optical communication, which appears in the latest issue of Optics Express, a premiere optics journal currently in circulation.

Dr. Paul Corrigan, a research associate at the MIRTHE Foundation and a Visiting Assistant Professor at Stevens, working along with Stevens Associate Professor Rainer Martini and Professor Edward Whittaker, spent months researching and writing the study as part of their free-space optics test-bed established in the Physics Department at Stevens.

Free-space optical communication is line-of-sight laser communication through the air. To date, the primary barrier to commercial uptake of this technology has been the limitations imposed by adverse weather, particularly fog, which restricts conventional near-infrared laser systems throughput in the air. The quantum cascade laser (QCL) provides key optical emission wavelengths in the mid-infrared that are thought to overcome many of these problems and thereby increase communication robustness, data security and deployable range.

However, in the optics community there has been a debate as to whether a mid-infrared source really is a better physical layer solution than near-infrared light. Much of the debate hinged on the shortage of good data that compares systems side-by-side in a fair way.

At Stevens, the free-space optics group created a world leading multi-wavelength test bed with "off-the-shelf" telecom systems and QCLs. They found that in adverse conditions such as haze, fog and rain, a mid-infrared QCL system truly is stronger, delivering up to 300% greater throughput than conventional systems.

What makes the paper special is that the professors also present the first experimental evidence – to their knowledge – of a unique atmospheric effect called "scavenging," where the composition of fog changes with respect to QCL light in a previously unmeasured way due to the presence of rain.

"The application of this study extends not only to industrial development of free-space optical systems for fast high bandwidth deployment, but also to military applications in targeting, as well as possibly to understanding the formation and lifetime of fog, something that has not been very well understood up to now," said Dr. Corrigan.

Patrick A. Berzinski | EurekAlert!
Further information:
http://www.stevens.edu
http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-17-6-4355

More articles from Physics and Astronomy:

nachricht From rocks in Colorado, evidence of a 'chaotic solar system'
23.02.2017 | University of Wisconsin-Madison

nachricht Prediction: More gas-giants will be found orbiting Sun-like stars
22.02.2017 | Carnegie Institution for Science

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Stingless bees have their nests protected by soldiers

24.02.2017 | Life Sciences

New risk factors for anxiety disorders

24.02.2017 | Life Sciences

MWC 2017: 5G Capital Berlin

24.02.2017 | Trade Fair News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>