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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 20 — Oct. 1, 2007
  • pp: 12905–12915

Enhancement of Nd:YAG LIBS emission of a remote target using a simultaneous CO2 laser pulse

Dennis K. Killinger, Susan D. Allen, Robert D. Waterbury, Chris Stefano, and Edwin L. Dottery  »View Author Affiliations


Optics Express, Vol. 15, Issue 20, pp. 12905-12915 (2007)
http://dx.doi.org/10.1364/OE.15.012905


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Abstract

For the first time to the best of our knowledge, a simultaneous 10.6 μm CO2 laser pulse has been used to enhance the Laser Induced Breakdown Spectroscopy (LIBS) emission from a 1.064 μm Nd:YAG laser induced plasma on a hard target. The enhancement factor was on the order of 25 to 300 times, depending upon the emission lines observed. For an alumina ceramic substrate the Al emission lines at 308 nm and Fe impurity line at 278 nm showed an increase of 60× and 119×, respectively. The output energy of the Nd:YAG laser was 50 mJ/pulse focused to a 1 mm diameter spot to produce breakdown. The CO2 laser pulse had a similar energy density of 40 mJ/mm2. Timing overlap of the two laser pulses within 1 microsecond was important for enhancement to be observed. An observed feature was the differential enhancement between different elemental species and also between different ionization states, which may be helpful in the application of LIBS for multi-element analysis.

© 2007 Optical Society of America

OCIS Codes
(300.6365) Spectroscopy : Spectroscopy, laser induced breakdown

ToC Category:
Spectroscopy

History
Original Manuscript: July 17, 2007
Revised Manuscript: September 9, 2007
Manuscript Accepted: September 12, 2007
Published: September 24, 2007

Citation
Dennis K. Killinger, Susan D. Allen, Robert D. Waterbury, Chris Stefano, and Edwin L. Dottery, "Enhancement of Nd:YAG LIBS emission of a remote target using a simultaneous CO2 laser pulse," Opt. Express 15, 12905-12915 (2007)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-20-12905


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