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En se propageant dans l'atmosphère, une impulsion laser ultra brève subit des effets non linéaires qui mènent à la formation de colonnes de plasma. Les propriétés uniques de ces structures, appelées filaments, ont poussées plusieurs scientifiques à les utiliser pour faire des études atmosphériques. Au cours de cette présentation, nous présenterons une technique de télédétection conjointe filaments/LIDAR pour mesurer des contaminants atmosphériques. Pour ce faire, un nuage d'aérosol, formé à partir d'une solution aqueuse contaminée par des sels métalliques, est sondé à l'aide de filaments générés à diverses distances. Nous avons découvert que cette technique permet de mesurer une faible …
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Tilting of the lens which creates filament, increases the sensitivity and the selectivity of filament-induced fluorescence spectroscopy of gas targets. Filament splitting and white light reduction occurred by lens tilting. The latter aspect plays an important role in decreasing the background or noise level of spectra. Filament splitting is explained by astigmatism which leads to shorter filaments. The latter results in weaker white light production.
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Tilting of the lens which creates filament, increases the sensitivity and the selectivity of filament-induced fluorescence spectroscopy of gas targets. Filament splitting and white light reduction occurred by lens tilting. The latter aspect plays an important role in decreasing the background or noise level of spectra. Filament splitting is explained by astigmatism which leads to shorter filaments. The latter results in weaker white light production.
Colloque
Tilting of the lens which creates filament, increases the sensitivity and the selectivity of filament-induced fluorescence spectroscopy of gas targets. Filament splitting and white light reduction occurred by lens tilting. The latter aspect plays an important role in decreasing the background or noise level of spectra. Filament splitting is explained by astigmatism which leads to shorter filaments. The latter results in weaker white light production.
Colloque
Tilting of the lens which creates filament, increases the sensitivity and the selectivity of filament-induced fluorescence spectroscopy of gas targets. Filament splitting and white light reduction occurred by lens tilting. The latter aspect plays an important role in decreasing the background or noise level of spectra. Filament splitting is explained by astigmatism which leads to shorter filaments. The latter results in weaker white light production.
