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Detection of OH and H2O in an Atmospheric Flame by Near-Infrared Optical Frequency Comb Spectroscopy
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
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2017 (English)In: 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), IEEE, 2017Conference paper, Published paper (Refereed)
Abstract [en]

Absorption spectroscopy is attractive for combustion diagnostics because it allows in-situ and calibration-free quantification of reactants/products and thermometry. However, spectra measured at atmospheric pressure in the near-infrared telecom range, where laser sources and optical components are readily available, suffer from strong water interference. Cavity-enhanced optical frequency comb spectroscopy (CE-OFCS) is well suited for detection of other species, as it provides broad bandwidth with high signal-to-noise ratio and resolution, and allows de-convolving the spectra hidden among water transitions. Here we report detection of OH in the presence of H2O in an atmospheric premixed methane/air flat flame by CE-OFCS at 1.57 μm. We demonstrate a new water line list that is more accurate than HITEMP [1] and we isolate the OH lines by dividing spectra taken at different heights above the burner (HABs) to retrieve OH concentration and flame temperature.

Place, publisher, year, edition, pages
IEEE, 2017.
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:umu:diva-152156DOI: 10.1109/CLEOE-EQEC.2017.8086912ISI: 000432564600671ISBN: 978-1-5090-6736-7 (electronic)OAI: oai:DiVA.org:umu-152156DiVA, id: diva2:1252336
Conference
Conference on Lasers and Electro-Optics Europe / European Quantum Electronics Conference (CLEO/Europe-EQEC), JUN 25-29, 2017, Munich, GERMANY
Funder
Swedish Research Council, 621-2012-3650Swedish Foundation for Strategic Research , ICA12-0031Knut and Alice Wallenberg Foundation, KAW 2015.0159Available from: 2018-10-01 Created: 2018-10-01 Last updated: 2018-10-01Bibliographically approved

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Rutkowski, LucileJohansson, Alexandra C.Khodabakhsh, AmirValiev, DamirSchmidt, Florian M.Foltynowicz, Aleksandra

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Rutkowski, LucileJohansson, Alexandra C.Khodabakhsh, AmirValiev, DamirTennyson, JonathanSchmidt, Florian M.Foltynowicz, Aleksandra
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Department of PhysicsDepartment of Applied Physics and Electronics
Atom and Molecular Physics and Optics

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