Focal-length dependence of air breakdown by a 20-psec laser pulse
- 15 February 1974
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 24 (4) , 175-177
- https://doi.org/10.1063/1.1655141
Abstract
The focal-length f and beam-diameter D dependence of threshold power for air breakdown has been investigated using focused ∼20-psec 1.06-μ laser pulses. Primary spherical aberration is shown to be very important in determining the threshold power when D/f is large. Diffusion-type losses and self-focusing played no part in the breakdown mechanism in the present work.Keywords
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