Study of ambient air ionization with femtosecond laser pulses

Yi Wang; Xiaolei Wang; Nan Zhang; Hongchen Zhai; Xiaonong Zhu

doi:10.1117/12.575635

26 January 2005 Study of ambient air ionization with femtosecond laser pulses

Yi Wang, Xiaolei Wang, Nan Zhang, Hongchen Zhai, Xiaonong Zhu

Proceedings Volume 5627, High-Power Lasers and Applications III; (2005) https://doi.org/10.1117/12.575635
Event: Photonics Asia, 2004, Beijing, China

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 ε_th varies direct as t_p^x, 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.

Citation Download 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, (26 January 2005); https://doi.org/10.1117/12.575635

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