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Proceedings Paper

Absorptive detection of methane by using LED coupled with optical fiber
Author(s): Litian Wang; Yutian Wang; Longjiang Zheng; Tingrong Guo; Jie Wang
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Paper 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%.

Paper Details

Date Published: 3 October 2000
PDF: 3 pages
Proc. SPIE 4220, Advanced Photonic Sensors: Technology and Applications, (3 October 2000); doi: 10.1117/12.401704
Show Author Affiliations
Litian Wang, Yanshan Univ. (China)
Yutian Wang, Yanshan Univ. (China)
Longjiang Zheng, Yanshan Univ. (China)
Tingrong Guo, Yanshan Univ. (China)
Jie Wang, Yanshan Univ. (China)

Published in SPIE Proceedings Vol. 4220:
Advanced Photonic Sensors: Technology and Applications
Jinfa Tang; Chao-Nan Xu; Haizhang Li, Editor(s)

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