Kun Duan received the B.Eng. degree from Xi’an Jiaotong University, Xi’an, China, in 2019, and the Ph.D. degree from The Chinese University of Hong Kong (CUHK), Hong Kong, SAR, China, in 2023. He is currently a Research Associate with the Department of Mechanical and Automation Engineering, CUHK. His research interests include combustion diagnostics and trace gas sensing using laser absorption spectroscopy and cavity enhanced spectroscopy.