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
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.