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Proceedings Paper

Guiding pulsed infrared laser radiation using a femtosecond filament array waveguide for the purpose of remote sensing
Author(s): Mostafa Alshershby; Zuoqiang Hao; Acner Camino; Jingquan Lin
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Paper Abstract

A hollow cylindrical plasma waveguide, which cladding consists of a large number of a chaotically distributed plasma filaments induced by the propagation of femtosecond (fs) laser pulses in air, is shown to support guided modes of pulsed infrared (IR) laser radiation. Taking into account the discontinuity and the finiteness of the waveguide cladding, the loss coefficient loss of the laser radiation is calculated for different spatial configurations. We report how the waveguide loss depends on its structural parameters like normalized plasma diameter, distance between filaments, core-radius, cladding’s thickness, and filaments’ electron density. For typical plasma parameters, the loss of the fs plasma waveguide is found to be lower than that of freely propagating IR laser beams to distances in the order of the filamentation length. This fact allows the delivery of collimated pulsed laser light over long distances in atmospheric air, which is necessary for optical-based remote sensing and the detection of chemical and biological agents.

Paper Details

Date Published: 19 September 2013
PDF: 14 pages
Proc. SPIE 8905, International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications, 89051B (19 September 2013); doi: 10.1117/12.2033948
Show Author Affiliations
Mostafa Alshershby, Changchun Univ. of Science and Technology (China)
Zuoqiang Hao, Changchun Univ. of Science and Technology (China)
Acner Camino, Changchun Univ. of Science and Technology (China)
Jingquan Lin, Changchun Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 8905:
International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications
Farzin Amzajerdian; Astrid Aksnes; Weibiao Chen; Chunqing Gao; Yongchao Zheng; Cheng Wang, Editor(s)

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