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Proceedings Paper

Urban gas monitoring system using optical sensors
Author(s): Hideo Tai
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Paper Abstract

We have developed a methane monitoring system using a 1.66 μm distributed-feedback semiconductor laser. The detection limit of the system is 70 ppb m in concentration pathlength product with the time constant of 1 s. This high sensitivity is achieved by the second-harmonic detection of wavelength modulation frequency of the laser whose center wavelength is stabilized on an the absorption line of methane.

The system was installed on a vehicle in combination with a positioning system and a mobile GIS that enabled to record and indicate gas leakage points from buried pipelines on the digital map at the real time.

Paper Details

Date Published: 1 September 1999
PDF: 5 pages
Proc. SPIE 3746, 13th International Conference on Optical Fiber Sensors, 37463Z (1 September 1999); doi: 10.1117/12.2302133
Show Author Affiliations
Hideo Tai, Tokyo Gas Co., Ltd. (Japan)

Published in SPIE Proceedings Vol. 3746:
13th International Conference on Optical Fiber Sensors
Byoung Yoon Kim; Kazuo Hotate, Editor(s)

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