Frequency-division-multiplexed Fabry-Perot interferometric fiber sensors for temperature monitoring in a selective catalytic reduction unit

Fabin Shen; Zhengyu Huang; Yizheng Zhu; Michael Coffey; Robert Frank; Gary Pickrell; Anbo Wang

doi:10.1117/12.633894

5 November 2005 Frequency-division-multiplexed Fabry-Perot interferometric fiber sensors for temperature monitoring in a selective catalytic reduction unit

Fabin Shen, Zhengyu Huang, Yizheng Zhu, Michael Coffey, Robert Frank, Gary Pickrell, Anbo Wang

Author Affiliations +

Proceedings Volume 5998, Sensors for Harsh Environments II; 59980H (2005) https://doi.org/10.1117/12.633894
Event: Optics East 2005, 2005, Boston, MA, United States

Abstract

We present the quasi-distributed temperature measurement results in a selective catalytic reduction unit of a power plant by using a frequency-division-multiplexing optical fiber measurement system with eight intrinsic Fabry-Perot interferometric fiber sensors along a single fiber. The sensor was constructed by splicing a section of multimode fiber between single mode fibers. A high resolution swept laser interrogator was used to measure the spectrogram of the reflected light from the sensors, which contains multiple frequency components in wave number domain corresponding to sensors with different cavity lengths. The temperatures were measured by estimating the optical path length of each Fabry-Perot interferometer. Field test results show that the proposed technology can potentially be used in applications of multi-point high temperature sensing.

Citation Download Citation

Fabin Shen, Zhengyu Huang, Yizheng Zhu, Michael Coffey, Robert Frank, Gary Pickrell, and Anbo Wang "Frequency-division-multiplexed Fabry-Perot interferometric fiber sensors for temperature monitoring in a selective catalytic reduction unit", Proc. SPIE 5998, Sensors for Harsh Environments II, 59980H (5 November 2005); https://doi.org/10.1117/12.633894

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