Strategies for formaldehyde engines using a single-mode detection in flames and Nd : YAG/OPO laser system

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Strategies for formaldehyde engines using a single-mode detection in flames and Nd : YAG/OPO laser system. / Brackmann, Christian; Li, Zhongshan; Rupinski, M; Docquier, N; Pengloan, G; Aldén, Marcus.

I: Applied Spectroscopy, Vol. 59, Nr. 6, 2005, s. 763-768.

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

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TY - JOUR

T1 - Strategies for formaldehyde engines using a single-mode detection in flames and Nd : YAG/OPO laser system

AU - Brackmann, Christian

AU - Li, Zhongshan

AU - Rupinski, M

AU - Docquier, N

AU - Pengloan, G

AU - Aldén, Marcus

PY - 2005

Y1 - 2005

N2 - This paper presents technical developments for the detection of formaldehyde (CH2O) using laser-induced fluorescence. The easily accessible third harmonic of the Nd:YAG laser at 355 nm was used for excitation of formaldehyde. In order to investigate potential background fluorescence, e.g., from large molecules such as polyaromatic hydrocarbons, special attention was paid to investigating the possibility of scanning the wavelength of a single-mode Nd:YAG laser under the gain profile, similar to 3 cm(-1), on and off resonance. Furthermore, a technique for simultaneous detection of formaldehyde and 011 using one laser system is presented. The single-mode Nd:YAG laser at 355 nm in combination with an optical parametric oscillator (OPO) laser tuned to 283 nm was used for simultaneous two-dimensional imaging of both species using one charge-coupled device (CCD) detector equipped with a dual filter image separator. The techniques are demonstrated with measurements in laboratory flames and the combined measurements are also demonstrated in an engine.

AB - This paper presents technical developments for the detection of formaldehyde (CH2O) using laser-induced fluorescence. The easily accessible third harmonic of the Nd:YAG laser at 355 nm was used for excitation of formaldehyde. In order to investigate potential background fluorescence, e.g., from large molecules such as polyaromatic hydrocarbons, special attention was paid to investigating the possibility of scanning the wavelength of a single-mode Nd:YAG laser under the gain profile, similar to 3 cm(-1), on and off resonance. Furthermore, a technique for simultaneous detection of formaldehyde and 011 using one laser system is presented. The single-mode Nd:YAG laser at 355 nm in combination with an optical parametric oscillator (OPO) laser tuned to 283 nm was used for simultaneous two-dimensional imaging of both species using one charge-coupled device (CCD) detector equipped with a dual filter image separator. The techniques are demonstrated with measurements in laboratory flames and the combined measurements are also demonstrated in an engine.

KW - laser-induced fluorescence

KW - formaldehyde

KW - combustion diagnostics

M3 - Article

VL - 59

SP - 763

EP - 768

JO - Applied Spectroscopy

T2 - Applied Spectroscopy

JF - Applied Spectroscopy

SN - 1943-3530

IS - 6

ER -