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Diagnostic properties of two-photon-pumped stimulated emission in atmospheric species

Bood, Joakim LU and Aldén, Marcus LU (2018) In Springer Series in Optical Sciences 208. p.1-17
Abstract

Two-photon excitation provides access to atoms and molecules with absorption resonances in the vacuum ultraviolet (VUV), i.e., to the species otherwise inaccessible for probing under atmospheric conditions, since the atmosphere strongly absorbs VUV radiation. In addition, for high enough laser intensities, two-photon pumping may create population inversion between the pumped energy state and a lower-lying intermediate state, resulting in stimulated emission. In this chapter such an emission is discussed in terms of its diagnostic capacity. The method has primarily been investigated for the detection of a number of atomic species, such as oxygen and nitrogen, and a few small molecules, for example, CO and NH3. The major... (More)

Two-photon excitation provides access to atoms and molecules with absorption resonances in the vacuum ultraviolet (VUV), i.e., to the species otherwise inaccessible for probing under atmospheric conditions, since the atmosphere strongly absorbs VUV radiation. In addition, for high enough laser intensities, two-photon pumping may create population inversion between the pumped energy state and a lower-lying intermediate state, resulting in stimulated emission. In this chapter such an emission is discussed in terms of its diagnostic capacity. The method has primarily been investigated for the detection of a number of atomic species, such as oxygen and nitrogen, and a few small molecules, for example, CO and NH3. The major benefits of the technique are that the signal propagates in a laser-like beam, the backward-directed beam allows single-ended diagnostics, strong signals allow trace-level detection, and the optical setup is relatively simple. The main disadvantages are the poor and sometimes ambiguous spatial resolution and the difficulties with modeling the process due to the nonlinear dependence of the signal on the concentration of the active species and the integrative-growth nature of the signal. Besides exploring the potential for diagnostics, early works on two-photon-induced stimulated emission have been imperative for today’s development of air-lasing concepts based on backward-directed stimulated emission. This chapter is devoted to a review and summary of these pioneering studies.

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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Springer Series in Optical Sciences
volume
208
pages
17 pages
publisher
Springer Verlag
external identifiers
  • scopus:85038628239
ISSN
1556-1534
0342-4111
DOI
10.1007/978-3-319-65220-7_1
language
English
LU publication?
yes
id
908ecad1-b1c9-47d1-ab63-5bd5ad324d80
date added to LUP
2018-01-03 07:41:07
date last changed
2018-01-03 07:41:07
@inbook{908ecad1-b1c9-47d1-ab63-5bd5ad324d80,
  abstract     = {<p>Two-photon excitation provides access to atoms and molecules with absorption resonances in the vacuum ultraviolet (VUV), i.e., to the species otherwise inaccessible for probing under atmospheric conditions, since the atmosphere strongly absorbs VUV radiation. In addition, for high enough laser intensities, two-photon pumping may create population inversion between the pumped energy state and a lower-lying intermediate state, resulting in stimulated emission. In this chapter such an emission is discussed in terms of its diagnostic capacity. The method has primarily been investigated for the detection of a number of atomic species, such as oxygen and nitrogen, and a few small molecules, for example, CO and NH<sub>3</sub>. The major benefits of the technique are that the signal propagates in a laser-like beam, the backward-directed beam allows single-ended diagnostics, strong signals allow trace-level detection, and the optical setup is relatively simple. The main disadvantages are the poor and sometimes ambiguous spatial resolution and the difficulties with modeling the process due to the nonlinear dependence of the signal on the concentration of the active species and the integrative-growth nature of the signal. Besides exploring the potential for diagnostics, early works on two-photon-induced stimulated emission have been imperative for today’s development of air-lasing concepts based on backward-directed stimulated emission. This chapter is devoted to a review and summary of these pioneering studies.</p>},
  author       = {Bood, Joakim and Aldén, Marcus},
  issn         = {1556-1534},
  language     = {eng},
  pages        = {1--17},
  publisher    = {Springer Verlag},
  series       = {Springer Series in Optical Sciences},
  title        = {Diagnostic properties of two-photon-pumped stimulated emission in atmospheric species},
  url          = {http://dx.doi.org/10.1007/978-3-319-65220-7_1},
  volume       = {208},
  year         = {2018},
}