As much as tenfold atomic emission enhancements have been observed in experiments combining nanosecond (ns) and femtosecond (fs) laser pulses in an orthogonal dual-pulse configuration for laser-induced breakdown spectroscopy (ns–fs orthogonal dual-pulse LIBS). In the examination of one of several potential sources of these atomic emission enhancements (sample heating by a ns air spark), minor reductions in atomic emission and as much as 15-fold improvements in mass removal have been observed for fs single-pulse LIBS of heated brass and aluminum samples. These results suggest that, although material removal with a high-powered, ultrashort fs pulse is temperature dependent, sample heating by the ns air spark is not the source of the atomic emission enhancements observed in ns–fs orthogonal dual-pulse LIBS.
© 2004 Optical Society of America
Jon Scaffidi, William Pearman, J. Chance Carter, Bill W. Colston, and S. Michael Angel, "Effects of Sample Temperature in Femtosecond Single-Pulse Laser-Induced Breakdown Spectroscopy," Appl. Opt. 43, 2786-2791 (2004)