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Proceedings Paper

Fiber optic multigas monitoring technique by fiber grating model filter in transformer oil due to fault
Author(s): Zongbi Huang; Shaohui Li; Zhipeng Zhang; Yuanzhong Xu
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Paper Abstract

In the paper, an applying system based on the technique of modulated optical fiber grating model filter is presented. It adopts WDM/TDM method to realize multiple mixture gases monitoring in transformer oil due to fault. A selective- absorption detection, which is based on absorption spectrum of gas molecules in the near IR, is used in our system. For monitoring trace fault-gas, an advanced over-width sine-wave wavelength modulation technique is invented, because of its benefit of stability and applicability. We also point out how to apply a reflection fiber grating optical filter to the harmonic detection. Through using those techniques, light source made up of imperfect components attains quality and level required by the ppm gas monitory. As the result of theory and experiment, the principles of choosing LD/LED and modulating PZT are given too.

Paper Details

Date Published: 13 August 1998
PDF: 7 pages
Proc. SPIE 3555, Optical and Fiber Optic Sensor Systems, (13 August 1998); doi: 10.1117/12.318189
Show Author Affiliations
Zongbi Huang, Huazhong Univ. of Science and Technology (China)
Shaohui Li, Huazhong Univ. of Science and Technology (China)
Zhipeng Zhang, Huazhong Univ. of Science and Technology (China)
Yuanzhong Xu, Hong Kong Polytechnic Univ. (China)


Published in SPIE Proceedings Vol. 3555:
Optical and Fiber Optic Sensor Systems
Shanglian Huang; Kim D. Bennett; David A. Jackson, Editor(s)

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