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Proceedings Article

Study of ambient air ionization with femtosecond laser pulses

[+] Author Affiliations
Yi Wang, Xiaolei Wang, Nan Zhang, Hongchen Zhai, Xiaonong Zhu

Nankai Univ. (China)

Proc. SPIE 5627, High-Power Lasers and Applications III, 105 (February 28, 2005); doi:10.1117/12.575635
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From Conference Volume 5627

  • High-Power Lasers and Applications III
  • Dianyuan Fan; Ken-ichi Ueda; Jongmin Lee
  • Beijing, China | November 08, 2004

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.

© (2005) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Yi Wang ; Xiaolei Wang ; Nan Zhang ; Hongchen Zhai and Xiaonong Zhu
"Study of ambient air ionization with femtosecond laser pulses", Proc. SPIE 5627, High-Power Lasers and Applications III, 105 (February 28, 2005); doi:10.1117/12.575635; http://dx.doi.org/10.1117/12.575635


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