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3 October 2000 Absorptive detection of methane by using LED coupled with optical fiber
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Proceedings Volume 4220, Advanced Photonic Sensors: Technology and Applications; (2000)
Event: Optics and Optoelectronic Inspection and Control: Techniques, Applications, and Instruments, 2000, Beijing, China
An all-optical remote methane sensing system was developed. It combines long and low-loss optical fiber link with high radiant InGaAsP diodes and an interference light filter. The high sensitive technique is achieved by using the differential absorption method in the system. Based on the laboratory study of the v2 + 2v3 overtone band of CH4 molecules at 1.33 micrometer, the system is used for remote detection in real time of low level gas. A methane monitor can detect concentration as low as 0.2%. The maximum is up to 100%.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Litian Wang, Yutian Wang, Longjiang Zheng, Tingrong Guo, and Jie Wang "Absorptive detection of methane by using LED coupled with optical fiber", Proc. SPIE 4220, Advanced Photonic Sensors: Technology and Applications, (3 October 2000);


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