TECHNOLOGIES
Laser-induced plasma (LIP) based on high-resolution spectroscopic analysis
This study focuses on Laser-Induced Plasma (LIP) diagnostics based on high-resolution spectroscopic analysis to improve the reliability of Laser-Induced Breakdown Spectroscopy (LIBS) for elemental characterization. The inherently non-uniform and temporally unstable nature of laser-induced plasmas remains one of the major challenges affecting the accuracy of quantitative LIBS results. In this work, we combined deterministic and stochastic modeling approaches to describe plasma evolution, with a particular emphasis on ionization–recombination dynamics. Plasma parameters such as electron temperature (Tₑ) and electron density (nₑ) were derived using Stark broadening and Boltzmann plot methods, while the effects of temporal fluctuations were evaluated using stochastic differential equations (SDE) solved by the Euler–Maruyama algorithm. Experimental validation was performed with StellarNet Nd:YAG-based LIBS systems on a variety of metallic samples. The results demonstrate that incorporating stochastic fluctuations into traditional deterministic models significantly improves plasma parameter estimation. This integrated methodology strengthens the diagnostic capability of LIBS, reduces uncertainty in quantitative analysis, and provides a robust framework for applying high-resolution spectroscopic techniques to the study of complex materials.