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Sensors 2011, 11(1), 32-53;

Femtosecond Laser Filamentation for Atmospheric Sensing

Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, China
Department of Physics, Engineering Physics and Optics & Center for Optics, Photonics and Laser (COPL), Université Laval, Québec City, QC, G1V0A6, Canada
Author to whom correspondence should be addressed.
Received: 19 November 2010 / Revised: 10 December 2010 / Accepted: 13 December 2010 / Published: 23 December 2010
(This article belongs to the Special Issue Gas Sensors - 2010)
Full-Text   |   PDF [343 KB, uploaded 21 June 2014]


Powerful femtosecond laser pulses propagating in transparent materials result in the formation of self-guided structures called filaments. Such filamentation in air can be controlled to occur at a distance as far as a few kilometers, making it ideally suited for remote sensing of pollutants in the atmosphere. On the one hand, the high intensity inside the filaments can induce the fragmentation of all matters in the path of filaments, resulting in the emission of characteristic fluorescence spectra (fingerprints) from the excited fragments, which can be used for the identification of various substances including chemical and biological species. On the other hand, along with the femtosecond laser filamentation, white-light supercontinuum emission in the infrared to UV range is generated, which can be used as an ideal light source for absorption Lidar. In this paper, we present an overview of recent progress concerning remote sensing of the atmosphere using femtosecond laser filamentation. View Full-Text
Keywords: femtosecond laser; filamentation; remote sensing femtosecond laser; filamentation; remote sensing
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Xu, H.L.; Chin, S.L. Femtosecond Laser Filamentation for Atmospheric Sensing. Sensors 2011, 11, 32-53.

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