Lasing action in air induced by ultra-fast laser filamentation |
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| Authors: | Q. Luo W. Liu S.L. Chin |
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| Affiliation: | (1) Centre d’Optique, Photonique et Laser (COPL) et Département de Physique, de Génie Physique et d’Optique, Université Laval, Québec, Québec G1K 7P4, Canada, CA |
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| Abstract: | The backscattered fluorescence of nitrogen from filaments generated by intense ultra-fast Ti:sapphire laser pulses propagating in air is studied. The backscattered fluorescence from N2 molecules and ions show an exponential increase with increasing filament length, indicating amplified spontaneous emission. Received: 11 October 2002 / Revised version: 3 December 2002 / Published online: 26 February 2003 RID="*" ID="*"Corresponding author. Fax: +1-418/6562-623, E-mail: qluo@phy.ulaval.ca |
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| Keywords: | PACS: 42.60.Lh 92.60.Ta 42.50.Hz |
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