Numerical Analysis of Electrical Breakdown Induced by Laser Irradiation in N₂/O₂Gas Mixture

Abstract

This paper presents a theoretical investigation on the electrical breakdown process of air induced by intense pulsed laser beams. We develop a computer simulation model including both the Boltzmann equation and the rate equations. The calculations are performed for different laser wavelengths of 308 nm (XeCl), 694 nm (ruby), 1.06 µ m (YAG) and 10.6 µ m ( CO2). The result on the laser wavelengths is qualitatively consistent with the experimental result. The laser-induced breakdown process is discussed in detail.

Comparative study on EUV and debris emission from CO2and Nd: YAG laser-produced tin plasmas

“…The IB absorption coefficient is proportional to ω -2 ; where ω is the angular frequency of the laser [3,4]. As the result, CO 2 laser is absorbed in superficial low-density region of the plasma due to the long wavelength, in contrast, Nd: YAG laser penetrates into the high-density region on the target surface.…”