Ultrashort pulse laser applications
Ultra-Short Pulsed Laser Generation Up to Femtosecond

The use of optical spectroscopy, particularly in the Lidar (Light Detection and Ranging) technique, has in recent years enabled direct access to the dynamics of atmospheric pollution. Thus, three-dimensional concentration maps of pollutants such as NO, NO₂, SO₂ or O₃ with very high sensitivity (parts per billion, ppb) and in real time have been obtained. In particular, this access to dynamics makes it possible to characterize plume dispersion and impact, fix responsibilities, study smog and inversion layer formations or simply obtain an accurate, realistic picture of air quality at a given site.

For gaseous pollutants, the DIAL (Differential Absorption...