Absorptive detection of methane by using LED coupled with optical fiber

Litian Wang; Yutian Wang; Longjiang Zheng; Tingrong Guo; Jie Wang

doi:10.1117/12.401704

3 October 2000 Absorptive detection of methane by using LED coupled with optical fiber

Litian Wang, Yutian Wang, Longjiang Zheng, Tingrong Guo, Jie Wang

Proceedings Volume 4220, Advanced Photonic Sensors: Technology and Applications; (2000) https://doi.org/10.1117/12.401704
Event: Optics and Optoelectronic Inspection and Control: Techniques, Applications, and Instruments, 2000, Beijing, China

Abstract

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%.

Citation Download Citation

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); https://doi.org/10.1117/12.401704

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