QCL-Based Dual-Comb Spectrometer for Multi-Species Measurements at High Temperatures and High Pressures
KAUST DepartmentClean Combustion Research Center
Mechanical Engineering Program
Physical Science and Engineering (PSE) Division
Permanent link to this recordhttp://hdl.handle.net/10754/663939
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Abstract<jats:p>Rapid multi-species sensing is an overarching goal in time-resolved studies of chemical kinetics. Most current laser sources cannot achieve this goal due to their narrow spectral coverage and/or slow wavelength scanning. In this work, a novel mid-IR dual-comb spectrometer is utilized for chemical kinetic investigations. The spectrometer is based on two quantum cascade laser frequency combs and provides rapid (4 µs) measurements over a wide spectral range (~1175–1235 cm−1). Here, the spectrometer was applied to make time-resolved absorption measurements of methane, acetone, propene, and propyne at high temperatures (>1000 K) and high pressures (>5 bar) in a shock tube. Such a spectrometer will be of high value in chemical kinetic studies of future fuels.</jats:p>
CitationZhang, G., Horvath, R., Liu, D., Geiser, M., & Farooq, A. (2020). QCL-Based Dual-Comb Spectrometer for Multi-Species Measurements at High Temperatures and High Pressures. Sensors, 20(12), 3602. doi:10.3390/s20123602
SponsorsThis research was funded by the Office of Sponsored Research at King Abdullah University of Science and Technology (KAUST).
We appreciate the support from Khalil Djebbi for troubleshooting the shock tube system.
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