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Lidar thermometry using two-line atomic fluorescence

Malmqvist, E. LU ; Borggren, J. LU ; Aldén, M. LU and Bood, J. LU (2019) In Applied Optics 58(4). p.1128-1133
Abstract

In this work, Scheimpflug lidar has been combined with the thermometric technique two-line atomic fluorescence, to carry out stand-off, spatially resolved temperature measurements. Indium atoms were seeded into a modified Perkin-Elmer-burner and two tunable single-mode diode lasers with their wavelengths tuned to 410.17 and 451.12 nm were used to excite the seeded atoms. The fluorescence signal was collected using both a line-scan detector and a two-dimensional intensified CCD camera. One-dimensional flame temperature profiles were measured at different heights above a porous-plug burner, located at a distance of 1.5 m from the lidar system. The technique was also used to demonstrate two-dimensional temperature measurements in the same... (More)

In this work, Scheimpflug lidar has been combined with the thermometric technique two-line atomic fluorescence, to carry out stand-off, spatially resolved temperature measurements. Indium atoms were seeded into a modified Perkin-Elmer-burner and two tunable single-mode diode lasers with their wavelengths tuned to 410.17 and 451.12 nm were used to excite the seeded atoms. The fluorescence signal was collected using both a line-scan detector and a two-dimensional intensified CCD camera. One-dimensional flame temperature profiles were measured at different heights above a porous-plug burner, located at a distance of 1.5 m from the lidar system. The technique was also used to demonstrate two-dimensional temperature measurements in the same flame. The accuracy of the measured temperature was found to be limited mainly by uncertainty in the spectral overlap between the laser emission and the indium atom absorption spectrum as well as uncertainty in laser power measurements. With the constraint that indium can be introduced into the measurement volume, it is anticipated that the developed measurement concept could constitute a valuable tool, allowing in situ spatially resolved thermometry in intractable industrial applications, sufferings from limited optical access, thus requiring remote single-optical-port sensing.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Optics
volume
58
issue
4
pages
6 pages
publisher
Optical Society of America
external identifiers
  • scopus:85060930096
  • pmid:30874162
ISSN
1559-128X
DOI
10.1364/AO.58.001128
language
English
LU publication?
yes
id
89ad1b88-4774-4ebf-a2f5-1d16d0e8de5a
date added to LUP
2019-02-11 12:41:38
date last changed
2024-02-14 17:45:23
@article{89ad1b88-4774-4ebf-a2f5-1d16d0e8de5a,
  abstract     = {{<p>In this work, Scheimpflug lidar has been combined with the thermometric technique two-line atomic fluorescence, to carry out stand-off, spatially resolved temperature measurements. Indium atoms were seeded into a modified Perkin-Elmer-burner and two tunable single-mode diode lasers with their wavelengths tuned to 410.17 and 451.12 nm were used to excite the seeded atoms. The fluorescence signal was collected using both a line-scan detector and a two-dimensional intensified CCD camera. One-dimensional flame temperature profiles were measured at different heights above a porous-plug burner, located at a distance of 1.5 m from the lidar system. The technique was also used to demonstrate two-dimensional temperature measurements in the same flame. The accuracy of the measured temperature was found to be limited mainly by uncertainty in the spectral overlap between the laser emission and the indium atom absorption spectrum as well as uncertainty in laser power measurements. With the constraint that indium can be introduced into the measurement volume, it is anticipated that the developed measurement concept could constitute a valuable tool, allowing in situ spatially resolved thermometry in intractable industrial applications, sufferings from limited optical access, thus requiring remote single-optical-port sensing.</p>}},
  author       = {{Malmqvist, E. and Borggren, J. and Aldén, M. and Bood, J.}},
  issn         = {{1559-128X}},
  language     = {{eng}},
  number       = {{4}},
  pages        = {{1128--1133}},
  publisher    = {{Optical Society of America}},
  series       = {{Applied Optics}},
  title        = {{Lidar thermometry using two-line atomic fluorescence}},
  url          = {{https://lup.lub.lu.se/search/files/119485255/ao_58_4_1128.pdf}},
  doi          = {{10.1364/AO.58.001128}},
  volume       = {{58}},
  year         = {{2019}},
}