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Proceedings Paper

Study of ambient air ionization with femtosecond laser pulses
Author(s): Yi Wang; Xiaolei Wang; Nan Zhang; Hongchen Zhai; Xiaonong Zhu
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Paper Abstract

The laser induced ionization of ambient air is studied experimentally with laser pulses whose durations range from 50 fs up to 10 ps at 800 nm. It is found that the minimum pulse energy for detectable air ionization follows the scaling law of εth varies direct as tpx, with 0.23 < x < 0.5, and x tends to rise for longer pulses within the range of 50 fs - 500 fs. For laser pulses from 0.7 ps to 10 ps, however, x is approximately equal to 0.8. The dependence of the critical intensity for air ionization on the beam spot size is also examined with a variety of focused laser beam spot sizes in the experiments.

Paper Details

Date Published: 26 January 2005
PDF: 7 pages
Proc. SPIE 5627, High-Power Lasers and Applications III, (26 January 2005); doi: 10.1117/12.575635
Show Author Affiliations
Yi Wang, Nankai Univ. (China)
Xiaolei Wang, Nankai Univ. (China)
Nan Zhang, Nankai Univ. (China)
Hongchen Zhai, Nankai Univ. (China)
Xiaonong Zhu, Nankai Univ. (China)

Published in SPIE Proceedings Vol. 5627:
High-Power Lasers and Applications III
Dianyuan Fan; Ken-ichi Ueda; Jongmin Lee, Editor(s)

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