Optimal emission enhancement in orthogonal double-pulse laser-induced breakdown spectroscopy

Sample Temperature Effect on Steel Measurement Using SP-LIBS and Collinear Long-short DP-LIBS

“…In recent years, in order to improve the industrial application of LIBS, many researchers developed LIBS technique to enhance and stabilize laser-induced plasma, in which the use of external energy is an effective method and has been widely studied. [16][17][18] The process of steel production is extremely complicate. The changes of sample temperature and morphology are involved in this process, which will greatly affect the real-time measurement accuracy of LIBS.…”

Double-pulse laser induced breakdown spectroscopy in orthogonal beam geometry to enhance line emission intensity from agricultural samples

“…However, a signal improvement can also be obtained by improving the conventional LIBS system, e.g. using a resonant excitation system [18] or double pulse (DP) LIBS [17,[19][20][21][22][23][24][25][26][27][28][29][30][31][32].…”

“…collinear, crossed beam or orthogonal, which allows preablation and reheating. In the DP LIBS orthogonal configuration the signal intensity can be increased by increasing the laser energy and/or the number of pulses without increasing the amount of ablated material [21,22,24,26,29,30]. The preservation of the physical structure of samples is particularly useful when analyzing samples in the form of soft and brittle pellets and for cultural heritage artifacts.…”

“…The preservation of the physical structure of samples is particularly useful when analyzing samples in the form of soft and brittle pellets and for cultural heritage artifacts. However, in the DP orthogonal configuration a high signal-to-noise ratio can be retained even at relatively low power density [26,29].…”

“…As far as we know all previous studies using DP LIBS in orthogonal geometry in the reheating mode have been performed on metals and metallic alloys [21,22,24,26,29,30]. Differently, this study was focused on chemically-complex matrices such as agricultural samples containing high amounts of organic matter (e.g.…”