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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 7 — Mar. 1, 2012
  • pp: B201–B212

Fraunhofer-type absorption lines in double-pulse laser-induced plasma

Lev Nagli, Michael Gaft, and Igor Gornushkin  »View Author Affiliations


Applied Optics, Vol. 51, Issue 7, pp. B201-B212 (2012)
http://dx.doi.org/10.1364/AO.51.00B201


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Abstract

We studied the confocal double-pulse laser-induced plasma in the very beginning of its life. It was found that the second laser pulse fired 0.7 to 5 µs after the first pulse produces plasma which, during the first 0 to 20 ns, resembles solar configuration. There is a very hot and compact plasma core that radiates a broad continuum spectrum and a much larger and cooler outer shell. The light from the hot core passes through the cold outer shell and is partly absorbed by atoms and ions that are in ground (or close to ground) states. This produces absorption lines that are similar to Fraunhofer lines observed in the sun spectrum. The possibility to use these absorption lines for new direct and calibration free laser-induced breakdown spectroscopy analytical applications, both in laboratory and industrial conditions, is proved.

© 2012 Optical Society of America

OCIS Codes
(020.3690) Atomic and molecular physics : Line shapes and shifts
(020.6580) Atomic and molecular physics : Stark effect
(350.5400) Other areas of optics : Plasmas
(020.1335) Atomic and molecular physics : Atom optics

History
Original Manuscript: October 3, 2011
Revised Manuscript: February 14, 2012
Manuscript Accepted: February 14, 2012
Published: March 1, 2012

Citation
Lev Nagli, Michael Gaft, and Igor Gornushkin, "Fraunhofer-type absorption lines in double-pulse laser-induced plasma," Appl. Opt. 51, B201-B212 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-7-B201


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