Consequences of femtosecond laser filament generation conditions in standoff laser induced breakdown spectroscopy

S. S. Harilal, J. Yeak, B. E. Brumfield, M. C. Phillips

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

The combination of femtosecond laser filament ablation and emission spectroscopy is a potential analytical tool for standoff characterization of samples of interest. We compare the emission features and physical conditions of plasmas generated from metal targets using either by loosely focused femtosecond filaments or by lens-free filaments. Our results show that the filament generation conditions influence the plasma properties appreciably which include the atomic and molecular emission features, persistence and plasma fundamentals (temperature and density). The loosely focused fs pulse filaments are found to generate ablation plumes with higher temperature and density along with increased persistence compared to plumes generated by lens-free filaments.

Original languageEnglish (US)
Pages (from-to)17941-17949
Number of pages9
JournalOptics Express
Volume24
Issue number16
DOIs
StatePublished - Aug 8 2016
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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