<title>Spectral-analytical characteristics of laser plasma under multipulse excitation regime</title>

Burst Mode Q:switched Laser Pulses for Plasma Excitation in LIBS Analysis

“…These peaks, like the rest of the spectrum, have higher intensity and better signal-noise relation for a train of pulses configuration. These results can be explained through a several steps process (Zabello et al, 2003). Initially, the absorption occurs in the first laser pulse at the sample surface, with the consequent overheating above the melting point.…”

“…Recently, it was reported a system with dual crystal modulator by using two LiF crystals (Galbacs et al, 2005). While this system improved the signal-noise relation and the intensity of the plasma emission, has the disadvantage associated with the gradual degradation of these crystals (Zabello et al, 2003). In our study we propose a new low cost LIBS system, which uses passively Q:Switched, capable to produce pulse trains that enhances the plasma intensity.…”