Application of Centroid Principle to Wavelength Demodulation of Fiber Grating Sensors

GONG Xianfeng; LI Zhongfu; WANG Zhangsong; GUO Zhuanyun; LU: Kecheng; LI Yigang

doi:10.13374/j.issn1001-053x.2004.04.049

Volume 26 Issue 4

Aug. 2021

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Article Navigation > Chinese Journal of Engineering > 2004 > 26(4): 429-432

GONG Xianfeng, LI Zhongfu, WANG Zhangsong, GUO Zhuanyun, LU: Kecheng, LI Yigang. Application of Centroid Principle to Wavelength Demodulation of Fiber Grating Sensors[J]. Chinese Journal of Engineering, 2004, 26(4): 429-432. doi: 10.13374/j.issn1001-053x.2004.04.049

Citation:

GONG Xianfeng, LI Zhongfu, WANG Zhangsong, GUO Zhuanyun, LU: Kecheng, LI Yigang. Application of Centroid Principle to Wavelength Demodulation of Fiber Grating Sensors[J]. Chinese Journal of Engineering, 2004, 26(4): 429-432. doi: 10.13374/j.issn1001-053x.2004.04.049

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Application of Centroid Principle to Wavelength Demodulation of Fiber Grating Sensors

doi: 10.13374/j.issn1001-053x.2004.04.049

1. Mechanical Engineering School, University of Science and Technology Beijing, Beijing 100083, China;
2. Institute of Physics, Nankai University, Tianjin 300071, China

Received Date: 2003-08-10
Available Online: 2021-08-17

Abstract

Abstract

Among the tunable filter technologies of optical fiber grating sensors, the peak method is an usual way, but it has poor precision and the result is unstable. A centroid principle method was proposed, which used the detection of wavelength variation by the centroid of scanned light intensity distribution curves. Compared with the peak method, the accuracy is improved 70 times and the error of the wavelength detection decreases greatly.
- centroid principle,
- wavelength demodulation,
- fiber grating