Design and Analysis of a Gas Sensor Based on a Ring Multi-Wavelength Fiber Laser in Near Infrared |
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| Authors: | Hong Li and D N Wang |
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| Institution: | (1) Hubei Key Laboratory of Bioanalytical Technique, Hubei Normal University, Huangshi, 435002, People’s Republic of China;(2) School of Mechanical and Electronic Engineering, Huangshi Institute of Technology, Huangshi, 435003, People’s Republic of China;(3) Department of Electrical Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People’s Republic of China |
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| Abstract: | Numerical model of a gas sensor based on the ring multi-wavelength fiber laser is discussed to detect gas such as methane
(CH4), which has multi-line absorption in near infrared. The schematic of the gas sensor is given, and its detecting principle
of multiple windows is demonstrated in detail. The detecting methods based on the differential method and the second harmonic
wave method in the sensor are analyzed, and the optimal information syncretions are used to process the information of the
detected gas. The analyzing results show the sensor has advantages over the traditional sensor, and can be expanded to detect
other gas such as acetylene (C2H4). |
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| Keywords: | Gas sensor The ring multi-wavelength fiber laser Multiple detecting windows Second harmonic wave method Optimal information syncretion |
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