Sensors 2011, 11(1), 32-53; doi:10.3390/s110100032
Review

Femtosecond Laser Filamentation for Atmospheric Sensing

1 Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, China 2 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; in revised form: 10 December 2010 / Accepted: 13 December 2010 / Published: 23 December 2010
(This article belongs to the Special Issue Gas Sensors - 2010)
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Abstract: 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.
Keywords: femtosecond laser; filamentation; remote sensing

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MDPI and ACS Style

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

AMA Style

Xu HL, Chin SL. Femtosecond Laser Filamentation for Atmospheric Sensing. Sensors. 2011; 11(1):32-53.

Chicago/Turabian Style

Xu, Huai Liang; Chin, See Leang. 2011. "Femtosecond Laser Filamentation for Atmospheric Sensing." Sensors 11, no. 1: 32-53.

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