Optoelectronic Sensor for NOz Detection
The paper presents opportunities of Cavity Enhanced Absorption Spectroscopy (CEAS) technique application in nitrogen oxides (NOx) detection. In this method the absorbing gas concentration is determined by decay time measurement of the light pulse trapped in an op-tical cavity. Measurements are not sensitive to fluctuation of both laser power and photodetector sensitivity. CEAS technique is a modification of Cavity Ring Down Spectroscopy (CRDS) tech-nique. It is based on off-axis arrangement of an optical cavity. NOx detection is carried out in the visible and infrared range. The signal is registered with a developed low noise photoreceiver. Features of the presented sensor show that it is possible to build a portable trace gases sensor. Its sensitivity could be comparable with that of chemical detectors. Such a system has several advantages: relatively low price, small size and weight, and possibility of detection of other gases.
J.Wojtas Z.Bielecki J.Mikolajczyk M.Nowakowski T.Stacewicz A.Czyzewski
Institute of Optoelectronics,Military University of Technology 2 Kaliskiego Str.,00-908 Warsaw,Polan Institute of Experimental Physics,Warsaw University 69 Hoza Str.,00-681 Warsaw,Poland Institute of Applied Optics,18 Kamionkowska Str.,03-805 Warsaw,Poland
国际会议
Progress in Electromagnetics Research Symposium 2009(2009年电磁学研究新进展学术研讨会)(PIERS 2009)
北京
英文
1088-1092
2009-03-23（万方平台首次上网日期，不代表论文的发表时间）