Vol. 17, issue 01, article # 6
pdf Kandidov V. P., Militsin V. O. Intensity of light field and electron concentration in the laser-induced plasma in a droplet of water aerosol exposed to a femtosecond laser pulse. Geometric optics analysis. // Atmospheric and oceanic optics. 2004. V. 17. No. 01. P. 46-53.Copy the reference to clipboard
Abstract:
he geometric optics approach is used to analyze propagation of a femtosecond laser pulse in a water microdroplet. The dynamics of spatial distribution of light intensity and electron concentration over the laser-induced plasma in a microdroplet exposed to a femtosecond laser pulse is investigated. The calculations have been carried out with the help of the ray-tracing technique. Shadow face reflection and ray interference that appear due to aberrated focusing are taken into account in the numerical simulation. The spatial distribution of light intensity obtained for droplets with the size larger than 20 mkm is close to that calculated by the Lorenz-Mie theory. It is shown that at the pulse duration of 45 fs (a Ti:Sapphire laser) and the peak intensity of 1011 W/cm2 an optical breakdown occurs in a water microdroplet 30 mkm in radius.