Recently, scientists have revealed that they have invented a new & improved laser sensing technology that could allow army and police to spot veiled bombs from a distance.

The Princeton University technology might also help scientists’ to determine airborne environmental pollutants and greenhouse gasses better than before.

Richard Miles, the research group leader and the co-author on paper, stated, “We are able to send a laser pulse out and get another pulse back from the air itself. The returning beam interacts with the molecules in the air and carries their finger prints.”

He worked together with three other fellow researchers, i.e., Arthur Dogariu, the lead author on the paper, James Michael of Princeton, and Marlan Scully, a professor with joint positions at Princeton and Texas A and M University.

This newly developed technology uses an ultraviolet laser pulse which focuses on a tiny patch of air, just like the way a magnifying glass focuses sunlight into a warm spot.

Within this warm spot atom of oxygen become “excited” as their electrons get pushed up to high energy levels, and when the pulse tops, the electrons drop down and produces infrared light.

Some of this light beam travels all along the length of the excited cylinder region and excite more electrons to drop down, intensifying & organizing the light into a coherent laser beam intended right back at the original laser.