半导体光子学与技术, 2004, 10 (2): 141, 网络出版: 2011-08-15  

Novel Optical Fiber Gas Sensor for On-line Measurement of Methane

Novel Optical Fiber Gas Sensor for On-line Measurement of Methane
作者单位
1 Dept. of Precis. Instrum. and Mechan., Harbin Institute of Technology, Harbin 150001, CHN
2 College of Electr. Eng., Yanshan University, Qinhuangdao 066004, CHN
摘要
Abstract
Based on analysis of near infrared spectral absorption of methane, absorption type optical fiber methane gas sensor with high sensitivity using DFB LD as a source is demonstrated. Light source modulation harmonic measurement is presented in this paper. In order to eliminate the noise, the ratio of the fundamental and second-harmonic signals is used. The mathematical model of gas concentration harmonic measurement is built up. The detection result of methane concentration is also shown. Experiments have proved a sensitivity of 28×10-6.

WANG Shu-tao, CHE Ren-sheng, LIU Jin, WANG Yu-tian. Novel Optical Fiber Gas Sensor for On-line Measurement of Methane[J]. 半导体光子学与技术, 2004, 10(2): 141. WANG Shu-tao, CHE Ren-sheng, LIU Jin, WANG Yu-tian. Novel Optical Fiber Gas Sensor for On-line Measurement of Methane[J]. Semiconductor Photonics and Technology, 2004, 10(2): 141.

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