Application of continuous-wave cavity ring-down spectroscopy to laminar flames

Gordon S. Humphries, Iain S. Burns, Michael Lengden

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this paper we describe the application of diode laser continuous-wave cavity ring-down spectroscopy (cw-CRDS) to in-situ flame diagnostics. Spectra of the P17e acetylene feature at 1535.4 nm were recorded in a premixed laminar ethylene/air flame. The overall absorption of the feature was measured to be ≈ 1.5×10−4 cm−1 a short distance above the reaction zone for a flame fuel equivalence ratio of 1.66, and the minimum detection limit (3σ) of the system was calculated to be1.2×10−5 cm−1. This demonstrates the potential of the technique for the measurement of weakly absorbing species in flames. Finally, we discuss the advantages and limitations of the cw-CRDS technique for flame measurements.
LanguageEnglish
Article number3900110
Number of pages10
JournalIEEE Photonics Journal
Volume8
Issue number1
Early online date12 Jan 2016
DOIs
Publication statusE-pub ahead of print - 12 Jan 2016

Fingerprint

continuous radiation
flames
Spectroscopy
cavities
rings
Acetylene
spectroscopy
Semiconductor lasers
Ethylene
Air
continuous wave lasers
acetylene
equivalence
ethylene
diodes
air

Keywords

  • cw-CRDS
  • combustion
  • cavity ring-down
  • diode laser

Cite this

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abstract = "In this paper we describe the application of diode laser continuous-wave cavity ring-down spectroscopy (cw-CRDS) to in-situ flame diagnostics. Spectra of the P17e acetylene feature at 1535.4 nm were recorded in a premixed laminar ethylene/air flame. The overall absorption of the feature was measured to be ≈ 1.5×10−4 cm−1 a short distance above the reaction zone for a flame fuel equivalence ratio of 1.66, and the minimum detection limit (3σ) of the system was calculated to be1.2×10−5 cm−1. This demonstrates the potential of the technique for the measurement of weakly absorbing species in flames. Finally, we discuss the advantages and limitations of the cw-CRDS technique for flame measurements.",
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Application of continuous-wave cavity ring-down spectroscopy to laminar flames. / Humphries, Gordon S.; Burns, Iain S.; Lengden, Michael.

In: IEEE Photonics Journal, Vol. 8, No. 1, 3900110, 12.01.2016.

Research output: Contribution to journalArticle

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