'Air Laser' Long-Range Sensor

An 'air laser' sensing technology developed at Princeton may be able to remotely measure airborne environmental pollutants and greenhouse gasses.

"We are able to send a laser pulse out and get another pulse back from the air itself," said Richard Miles, a professor of mechanical and aerospace engineering at Princeton, the research group leader and co-author on the paper. "The returning beam interacts with the molecules in the air and carries their finger prints."


(Air Laser)
The image shows a pulse of infra-red light from this "air laser."
have lower intensity light. The technique could be used for sensing
minute quantities of gas in the air from a distance.

The new laser sensing method uses an ultraviolet laser pulse that is focused on a tiny patch of air, similar to the way a magnifying glass focuses sunlight into a hot spot. Within this hot spot a cylinder-shaped region just 1 millimeter long oxygen atoms become "excited" as their electrons get pumped up to high energy levels. When the pulse ends, the electrons fall back down and emit infrared light. Some of this light travels along the length of the excited cylinder region and, as it does so, it stimulates more electrons to fall, amplifying and organizing the light into a coherent laser beam aimed right back at the original laser.

Researchers plan to use a sensor to receive the returning beam and determine what contaminants it encountered on the way back.

"In general, when you want to determine if there are contaminants in the air you need to collect a sample of that air and test it," Miles said. "But with remote sensing you don't need to do that..."

So far, the researchers have demonstrated the process in the laboratory over a distance of about a foot and a half. In the future they plan to increase the distance over which the beams travel, which they note is a straightforward matter of focusing the beam farther way.

Fans of Star Trek: TOS have been eagerly awaiting long range sensor scans that can detect the components of an atmosphere without needing to send crew members in red shirts to gather samples.


(Spock long range sensor scan)

From Eurekalert.

Scroll down for more stories in the same category. (Story submitted 1/28/2011)

Follow this kind of news @Technovelgy.

| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |

Would you like to contribute a story tip? It's easy:
Get the URL of the story, and the related sf author, and add it here.

Comment/Join discussion ( 3 )

Related News Stories - (" Engineering ")

Zero Mass 'Vaporators' Pull Drinking Water From The Air
Did you think of Star Wars?

Integrated Circuits Printed Right Onto Fabric!
'...a shirt that displayed email on its sleeve. - Margaret Atwood, 2003.

Drones Guided By The Mind Alone
'His treads left no tracks upon the floor...' - Clifford Simak, 1961.

3D Printed Artificial Muscles Are Stronger Than Yours
Bots don't need to work out.

 

Google
  Web TechNovelgy.com   

Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.

 

 

 

 

 

Current News

Orwell's Memory Hole Looms Larger Thanks To Nvidia
'All history was a palimpsest, scraped clean and reinscribed exactly as often as was necessary.'

Pipefish Robot Checks Pipes Cheap
Just like capsule endoscopy, but for bigger pipes. That go underground.

Nifty New SDS Space Debris Sensor For ISS
'Their radars... could easily pinpoint the debris of the early Space Age.'

NanoRacks Space Station Module Concept Validated
Space junk into space architecture.

Nuclear Drones Could Fly For Years
'I sent my eyes on their rounds and tended my gallery of one hundred-thirty changing pictures...'

SciFiQ Science Fiction Writing Aid
'Books were just a commodity that had to be produced, like jam or bootlaces.'

Robot Only Faster, Not Better, At Recycling
'Whenever a robot finds something it can't identify straight off... it puts whatever it is in the hopper outside your window.'

Poland Starts With 1000 Warmate 'Suicide Drones'
'Royal Security had told the pods to electrocute you or blast you into chum.'

Dream Of Building Your Own Rocket?
Fiorello Bodoni, you inspire all of us.

Zero Mass 'Vaporators' Pull Drinking Water From The Air
Did you think of Star Wars?

Elon Musk Fears A 'Fleet-Wide Hack' Of Autonomous Vehicles
'Khan grinned. 'It's alive! Bu-wahhahahah!''

China Melts Tibetan Permafrost To Plant Forest
'Can you give us a microwave spotlight?'

iFlytek Doctor Robot First To Pass Medical Exams
Doctor shortage? No problem, we'll just use the autodoc.

Slaughterbot AI KIller Quadcopter Drones
'The real border was defended by... a swarm of quasi-independent aerostats.'

Do We Really Want Backflipping Robots?
Also includes wonderful blooper reel.

RNA-Based Biocomputing Device
Living things can sense and analyze complex signals in living cells.

More SF in the News Stories

More Beyond Technovelgy science news stories

Home | Glossary | Invention Timeline | Category | New | Contact Us | FAQ | Advertise |
Technovelgy.com - where science meets fiction™

Copyright© Technovelgy LLC; all rights reserved.