Experimental Comparison Investigation on Emission Spectra of Reheating Double and Single Pulses Laser-Induced Fe Plasmas

In situ analysis of steel melt by double-pulse laser-induced breakdown spectroscopy with a Cassegrain telescope

“…To improve the long-distance signal, a double-pulse LIBS mode was also adopted in the system. Using double or multiple pulses separated by a short delay time (several microseconds) can produce a lower LOD and significant enhancements of emission line intensity as well as much improved signal-to-noise ratios [29][30][31][32][33][34][35]. However, to the best of our knowledge, the effect of double-or multi-pulses on steel melt has not been previously studied.…”

Recent progress on the application of LIBS for metallurgical online analysis in China

“…LIBS signal may be weak and unstable in single-pulsed LIBS setup. Wang et al tested doublepulse LIBS system to enhance the signal [19]. Figure 2 shows their experimental setup.…”

“…In addition, double-pulse excitation cannot only improve the sensitivity of LIBS, but also improve the stability of emission signal. Wang et al selected eight emission lines of Fe atom as the analytical lines and measure their intensity ten times per line [19]. The relative standard deviation (RSD) of the eight emission line intensities for SP-LIBS and DP-LIBS are shown in Fig.…”