Photonic Sensors, 2017, 7 (3): 261, Published Online: Dec. 4, 2017
Research on Multi-Component Gas Optical Detection System Based on Conjugated Interferometer
Gas conjugated interference filter Gas conjugated interference filter gas sensing gas sensing spectral absorption spectral absorption
Abstract
An optical multi-component gas detection system based on the conjugated interferometer (CI) is proposed and experimentally demonstrated. It can realize the concentration detection of mixture gas in the environment. The CI can transform the absorption spectrum of the target gases to a conjugated emission spectrum, when combining the CI with the broadband light source, the spectrum of output light matches well with the absorption spectrum of target gases. The CI design for different target gases can be achieved by replacing the kind of target absorbing gas in the CI filter. The traditional fiber gas sensor system requires multiple light sources for detection when there are several kinds of gases, and this problem has been solved by using the CI filter combined with the broadband light source. The experimental results show that the system can detect the concentration of multi-component gases, which are mixed with C2H2 and NH3. Experimental results also show a good concentration sensing linearity.
Xin GUI, Yuheng TONG, Honghai WANG, Haihu YU, Zhengying LI. Research on Multi-Component Gas Optical Detection System Based on Conjugated Interferometer[J]. Photonic Sensors, 2017, 7(3): 261.