Acoustic Diagnostics of Plasma Channels Induced by Intense Femtosecond Laser Pulses in Air
- 24 February 2005
- journal article
- Published by IOP Publishing in Chinese Physics Letters
- Vol. 22 (3), 636-639
- https://doi.org/10.1088/0256-307x/22/3/032
Abstract
Long plasma channels induced by femtosecond laser pulses in air are diagnosed using the sonographic method. By detecting the sound signals along the channels, the length and the electron density of the channels are measured. Refocusing is also observed at different laser energies and different focal lengths. We find that the sonographic method has manifest advantages compared to other techniques.Keywords
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