Fiber optic multigas monitoring technique by fiber grating model filter in transformer oil due to fault

Zongbi Huang; Shaohui Li; Zhipeng Zhang; Yuanzhong Xu

doi:10.1117/12.318189

13 August 1998 Fiber optic multigas monitoring technique by fiber grating model filter in transformer oil due to fault

Zongbi Huang, Shaohui Li, Zhipeng Zhang, Yuanzhong Xu

Proceedings Volume 3555, Optical and Fiber Optic Sensor Systems; (1998) https://doi.org/10.1117/12.318189
Event: Photonics China '98, 1998, Beijing, China

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.

Citation Download Citation

Zongbi Huang, Shaohui Li, Zhipeng Zhang, and Yuanzhong Xu "Fiber optic multigas monitoring technique by fiber grating model filter in transformer oil due to fault", Proc. SPIE 3555, Optical and Fiber Optic Sensor Systems, (13 August 1998); https://doi.org/10.1117/12.318189

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