Abstract

Laser-induced breakdown spectra were measured by using a 1.3 ps laser pulse on glass, steel, and copper. Material ablation with the use of picosecond excitation is very precise with well-formed sharpedged craters. The spectra obtained with 570 nm, 1.3 ps excitation decay more quickly and show significantly lower background emission than those that use 1064 nm, ∼7 ns excitation. The background was low enough that excellent laser-induced spectroscopy (LIBS) spectra were obtained on the three samples by using a single 1.3 ps laser pulse and a nongated detector. Similar results were obtained by using nanosecond excitation but with higher relative background signals. The radiance was similar with the use of pico- or nanosecond excitation; however, the radiant intensity was larger with nanosecond excitation because of the larger plasma.

Dual-pulse laser-induced breakdown spectroscopy with combinations of femtosecond and nanosecond laser pulses

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Appl. Opt. 42(30) 6099-6106 (2003)

Qualitative assessment of laser-induced breakdown spectra generated with a femtosecond fiber laser

Huan Huang, Lih-Mei Yang, and Jian Liu
Appl. Opt. 51(36) 8669-8676 (2012)

Spatial and temporal dependence of interspark interactions in femtosecond-nanosecond dual-pulse laser-induced breakdown spectroscopy

Jon Scaffidi, William Pearman, Marion Lawrence, J. Chance Carter, Bill W. Colston, and S. Michael Angel
Appl. Opt. 43(27) 5243-5250 (2004)

Influence of molybdenum layer on the laser plasma generated from interfacing copper layer

Chan K. Kim, Dong S. Kim, Seok H. Lee, Hee-S. Shim, and Sungho Jeong
Appl. Opt. 51(7) B93-B98 (2012)

Characterization of near-infrared low energy ultra-short laser pulses for portable applications of laser induced breakdown spectroscopy

Alexander W. Schill, David A. Heaps, Dimitra N. Stratis-Cullum, Bradley R. Arnold, and Paul M. Pellegrino
Opt. Express 15(21) 14044-14056 (2007)