报告人：Aamir Farooq教授

Clean Combustion Research Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia

时间：19:00-20:30, 2021.05.27

地点：线上会议（腾讯会议）ID：595 108 774

邀请人：汤成龙教授，武颖韬博士

报告题目: Mid-Infrared laser-based diagnostics for chemical kinetic investigations

摘要:

Mid-infrared region contains strong fundamental vibrational bands of many species of interest. This region thus provides opportunities for highly sensitive and species-specific measurements for a variety of applications. Mid-infrared diagnostics can be developed based on interband cascade lasers (ICLs), quantum cascade lasers (QCLs) and lasers based on non-linear frequency conversion. This talk will discuss some recent work on the application of QCLs and a difference-frequency-generation (DFG) laser for quantitative, time-resolved species concentration and temperature measurements in complex chemically reactive environments.

First, a pair of pulsed QCLs, targeting the fundamental vibrational band of carbon monoxide, were utilized to make rapid measurements of gas temperature. The down-chirp phenomenon was exploited to achieve large spectral tuning within the laser pulse at a high repetition frequency. Second, the chirped-pulse strategy was combined with cavity-enhanced absorption spectroscopy to make trace measurements of carbon monoxide in low-temperature oxidation. Finally, difference-frequency-generation technique was implemented, combining a QCL and CO₂ gas laser, to generate laser light in the C-H bending mode region near 13 – 15 mm. This enabled highly sensitive and selective measurements of aromatic species such as benzene.

报告人简介:

Dr. Farooq received his Ph.D. in Mechanical Engineering from Stanford University in 2010, and then joined King Abdullah University of Science and Technology (KAUST) as an Assistant Professor. He was promoted to the rank of Associate Professor in 2016. He is the principal investigator of the Chemical Kinetics and Laser Sensors Laboratory in the Clean Combustion Research Center (CCRC) at KAUST. His research interests are in the areas of energy, chemical kinetics, spectroscopy, and laser-based sensors. He has authored over 150 refereed journal articles and has given invited talks at a number of international conferences. At KAUST, he won the Distinguished Teaching Award, given to the best instructor over a period of two years. In 2019, Dr. Farooq was awarded the prestigious Hiroshi Tsuji Early Career Research Award by Elsevier and the Combustion Institute. In 2020, he received Research Excellence award by the Combustion Institute.