Sanguo Li
B616, 201-216-5662

Research Interest

    The project I am focusing on is optical fiber gas sensor system, it is based on the gas absorption spectroscopy technology. Fiber based optical spectroscopy technology with frequency modulation of laser diode had been applied in the gas sensor development and significantly improved the sensitivity of the detection system. Comparing with the conventional ionization and electrochemical gas sensors, the advantages of fiber sensors include their remote detection capability, high sensitivity and safety in hazardous environment, long term reliability and immunity to electromagnetic field.

    The optical gas leaking detector (OGLD) system with the battery supply had been developed.It is developed under the requirement of the coal mine industry for the real time monitoring of the methane gas concentration. The concentration level can directly been displayed on the LCD with the responding time of less than 6 seconds, there is also a LED functioning as the alarm light which will be trigged when the concentration of the methane is more than 0.5 percent.

    On the other hand, by incorporating several laser sources, these kind of optical-fiber networks should prove very powerful and provide real-time remote measurement and surveillance of inflammable and/or explosive gases, not only CH4 but also C3H8, C2H4, C2H2, and others, at strategic points within the environment such as petro-chemical plant, storage tanks, gas lines and so on.

    The objective of this study is to apply diode laser absorption spectroscopy techniques to investigate the spectra of Carbon Monoxide and Methane near 1560nm and 1645nm, determine the minimum detectable CO and CH4 concentrations in these spectral regions, and demonstrate the ability to determine the concentrations of methane and Carbon Monoxide.

    A diode-laser sensor system will be developed incorporating ultralow loss fiber networks and extensively used for the detection and surveillance of inflammable and/or explosive gases in industrial and mining complexes as well as in residential areas.

Education

  • 2006, Ph.D in Physics, Stevens Intitute of Technology, Hoboken, New Jersey, USA
  • 2003, M.E. in Engineering Physics, Stevens Institute of Technology, Hoboken, New Jersey, USA
  • 2001, B.E. in Applied Optics, Changchun Institute of Optics and Fine Mechanics, Changchun, Jilin, P.R.China

Publication

  • S. Li, T. Koscica, Y. Zhang, D. Li ,H. L. Cui, "Optical Fiber Remote Sensing System of Methane at 1645nm Using Wavelength-Modulation Technique",SPIE Optics East, Boston, Massachusetts, 23-26 October 2005.

  • S. Li, Y. Zhang, Z. Wei, Z. Yin, H. L. Cui, "Optical Gas Sensor for Remote Detection of CH4 Gas in Underground Mines", SPIE defense and security symposium, Orlando, Florida, USA, 2005.

  • S. Li, J. Ju, H. L. Cui, Y. A. Nikolaev, N. S. Panikov, "Study on Biochemical Organism Killing by Microwave", 1JCMB, Williamsburg, Virginia, USA, 4-8 November 2002.