Fiber-optic spark delivery for gas-phase laser-induced breakdown spectroscopy.
This article reports what are to the authors' knowledge the first gas-phase laser-induced breakdown spectroscopy (LIBS) measurements using a fiber-optically delivered spark. A silver- and polymer-coated hollow fiber delivered high-energy nanosecond 1064 nm Nd:YAG laser pulses, which were focused to generate high-energy-density plasmas in ultra-lean methane-air mixtures. Emissions from these plasmas were collected and spectroscopically analyzed to quantify relative fuel-to-air ratio. These measurements were compared with others made using traditional LIBS techniques without the fiber-optically delivered spark. Similar results were obtained, but with larger shot-to-shot variability, for the case of the fiber-optically delivered spark.
Dumitrescu
Cosmin
C
Department of Mechanical Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0286, USA.
Puzinauskas
Paulius
P
Olcmen
Semih
S
Buckley
Steven G
SG
Joshi
Sachin
S
Yalin
Azer P
AP