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Hamamatsu Corp. - Earth Innovations LB 2/24

‘Air Laser’ Sniffs Bombs, Pollutants from Afar

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PRINCETON, N.J., Feb. 1, 2011 — A new laser sensing technology that generates a laser beam out of thin air may allow soldiers to detect hidden bombs from a distance and scientists to better measure airborne environmental pollutants and greenhouse gasses. Researchers at Princeton University developed a technique for generating a laser beam out of nothing but air. They focus a pump laser on a distant point in the air and another laser beam comes back. The image shows a pulse of infrared light from this "air laser." The center region represents the highest intensity; the outer areas have lower intensity light. The...Read full article

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    Published: February 2011
    Glossary
    lidar
    Lidar, short for light detection and ranging, is a remote sensing technology that uses laser light to measure distances and generate precise, three-dimensional information about the shape and characteristics of objects and surfaces. Lidar systems typically consist of a laser scanner, a GPS receiver, and an inertial measurement unit (IMU), all integrated into a single system. Here is how lidar works: Laser emission: A laser emits laser pulses, often in the form of rapid and repetitive laser...
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