| Biography | |
|---|---|
 Prof. Jingsong Li Anhui University, China |
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| Title: Quartz crystal tuning fork (QCTF) based detector and its application | |
| Abstract: Laser spectroscopy sensing techniques show significant superiority in terms of sensitivity, selectivity and time resolution, and being universal in gaseous, solid, and liquid phases. Recent advances in new laser sources and detectors have triggered an increasing application in atmospheric monitoring, industrial process control, medical and combustion diagnostics, etc. In this paper, we report on the development of quartz crystal tuning fork (QCTF) based detector and its comparison with commercially mature detectors. Similar to the photoelectric effect of traditional semiconductor detectors, we utilize the piezoelectric effect of the QCTF to gauge the light intensity, and its resonant effect for signal enhancement. Details of integrating the QCTF detector with a broadband tunable external cavity quantum cascade laser (ECQCL) for sensitive detection of volatile organic compounds (VOCs) and atmospheric trace gases will be presented. The novel QCTF detector technology may pave a way towards developing a new type of photodetector suitable for the whole electromagnetic radiation. Keywords: QCTF; Piezoelectric detector; ECQCL; Gas sensing; Spectroscopic applications | |
| Biography: Dr. Jingsong Li received his PhD degree in Optics from Hefei Institute of Physical Science (HIPS), Chinese Academy of Sciences (CAS), China in 2008. He worked as a Postdoctoral fellowship, Research scientist and Visit scholarship at Reims University (France), Max Planck Institute for Chemistry (Germany), Colorado State University (USA) and Swiss Federal Laboratories for Materials Science and Technology (Switzerland), respectively. He is currently a professor at the College of Physics and Material Science, Anhui University, China. His research involves the development and implementation of novel mid-infrared quantum cascade lasers, sensitive spectroscopy techniques and advanced digital signal processing for trace gases and Volatile Organic Components (VOC) sensing for atmospheric chemistry, industrial and environmental applications. He has authored over 60 journal (including Sensors and Actuators B, Optics Express, Applied Spectroscopy and Applied Spectroscopy Reviews, etc.) and conference papers (invited talk at IRMMW2015, EESED2015& SOPO2017). Jingsong Li’s professional activities have included: Member of IEEE, OSA, SPIE and EGU; Approved candidate for a Visiting Fellowship in Canadian Government Laboratories, Natural Sciences and Engineering Research Council of Canada; Editorial board member of Sensors & Transducers Journal; Technical Program Committee Member of IEEE Sensors 2015-2017; Scientific Referee for tens of SCI international journals concerning fields of optics, laser/fibre sensor, digital signal processing and applied spectroscopy, and Referee of Research Proposal for China Scholarship Council (CSC), National Natural Science Foundation of China (NSFC), Swiss National Natural Science Foundation (SNSF). | |
