Two-photon-excited fluorescence of CO : Experiments and modeling
(2019) In Optics Express 27(18). p.25656-25669- Abstract
A model based on rate-equation analysis has been developed for simulation of two-photon-excited laser-induced fluorescence of carbon monoxide (CO) in the Hopfield-Birge band at 230 nm. The model has been compared with experimental fluorescence profiles measured along focused beams provided by lasers emitting nano-, pico-, and femtosecond pulses. Good quantitative agreement was obtained between simulations and experimental data obtained in premixed CH4/C2H4-air flames. For excitation with femtosecond pulses, experimental and simulated fluorescence signals showed quadratic dependence on laser power under conditions of low laser irradiance, whereas different sublinear dependencies were obtained at higher... (More)
A model based on rate-equation analysis has been developed for simulation of two-photon-excited laser-induced fluorescence of carbon monoxide (CO) in the Hopfield-Birge band at 230 nm. The model has been compared with experimental fluorescence profiles measured along focused beams provided by lasers emitting nano-, pico-, and femtosecond pulses. Good quantitative agreement was obtained between simulations and experimental data obtained in premixed CH4/C2H4-air flames. For excitation with femtosecond pulses, experimental and simulated fluorescence signals showed quadratic dependence on laser power under conditions of low laser irradiance, whereas different sublinear dependencies were obtained at higher irradiances due to photoionization. Simulations of CO signal versus femtosecond laser linewidth suggest the strongest signal for a transform-limited pulse, which is sufficiently broad spectrally to cover the CO Q-branch absorption spectrum. Altogether, the developed rate-equation model allows for analysis of two-photon excitation fluorescence to arrange suitable diagnostic configurations and retrieve quantitative data for CO as well as other species in combustion, such as atomic oxygen and hydrogen.
(Less)
- author
- Ruchkina, Maria LU ; Ding, Pengji LU ; Aldén, Marcus LU ; Bood, Joakim LU and Brackmann, Christian LU
- organization
- publishing date
- 2019
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Optics Express
- volume
- 27
- issue
- 18
- pages
- 14 pages
- publisher
- Optical Society of America
- external identifiers
-
- pmid:31510434
- scopus:85071541732
- ISSN
- 1094-4087
- DOI
- 10.1364/OE.27.025656
- language
- English
- LU publication?
- yes
- id
- 3e714665-274e-404f-bda6-e917a1c1078f
- date added to LUP
- 2019-09-17 10:46:54
- date last changed
- 2024-09-04 09:09:06
@article{3e714665-274e-404f-bda6-e917a1c1078f, abstract = {{<p>A model based on rate-equation analysis has been developed for simulation of two-photon-excited laser-induced fluorescence of carbon monoxide (CO) in the Hopfield-Birge band at 230 nm. The model has been compared with experimental fluorescence profiles measured along focused beams provided by lasers emitting nano-, pico-, and femtosecond pulses. Good quantitative agreement was obtained between simulations and experimental data obtained in premixed CH<sub>4</sub>/C<sub>2</sub>H<sub>4</sub>-air flames. For excitation with femtosecond pulses, experimental and simulated fluorescence signals showed quadratic dependence on laser power under conditions of low laser irradiance, whereas different sublinear dependencies were obtained at higher irradiances due to photoionization. Simulations of CO signal versus femtosecond laser linewidth suggest the strongest signal for a transform-limited pulse, which is sufficiently broad spectrally to cover the CO Q-branch absorption spectrum. Altogether, the developed rate-equation model allows for analysis of two-photon excitation fluorescence to arrange suitable diagnostic configurations and retrieve quantitative data for CO as well as other species in combustion, such as atomic oxygen and hydrogen.</p>}}, author = {{Ruchkina, Maria and Ding, Pengji and Aldén, Marcus and Bood, Joakim and Brackmann, Christian}}, issn = {{1094-4087}}, language = {{eng}}, number = {{18}}, pages = {{25656--25669}}, publisher = {{Optical Society of America}}, series = {{Optics Express}}, title = {{Two-photon-excited fluorescence of CO : Experiments and modeling}}, url = {{https://lup.lub.lu.se/search/files/119484905/oe_27_18_25656.pdf}}, doi = {{10.1364/OE.27.025656}}, volume = {{27}}, year = {{2019}}, }