Research on the distributed optical remote sensing of methane employing single laser source

作     者：尹王保 马维光 汪丽蓉 赵建明 肖连团 贾锁堂 

作者机构：College of Physics and Electronics Engineering Sbanxi University State Key Laboratory of Quantum Optics and Quantum Optics Devices Taiyuan 030006 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2004年第2卷第2期

页      面：86-88页

核心收录：

学科分类：0808[工学-电气工程] 070207[理学-光学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：This work was Partially supported by the National Natural Science Foundation of China(No.10174047 60078009)and the Natural Science Foundation of Shanxi Province(No.002096) 

主　　题：Laser optics Methane Mine explosions 

摘      要：A design and testing of a cost-effective distributed optical remote sensing methane system, which will help one to detect gas leaks from multi-coal face in mines simultaneously, is presented. The fundamentals of the remote detection are based on frequency-modulation spectroscopy (FMS) and harmonic detection. By utilizing fiber-optic splitting technique and reference-signal restoring circuit, the remote sensing system is feasible to employ single laser source to get multi-spot measurement in the near infrared region so that the system described here shows sufficient sensibility, considerably increased reliability and marketability over the presently available system. The minimum measurable path-integrated concentration is estimated to be about 423 ppb-m by experimentation.