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Proceedings Paper

A high-sensitive system of linear temperature sensing based on Raman scattering with an error correction method
Author(s): Jiacheng Hu; Qian Cong; Zijian Wang; Guoyang Li; Zeguo Liu
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Paper Abstract

The traditional temperature measurement system used the ratio of stokes light and anti-stokes light to demodulate the temperature, and there was an error when the ratio used directly. The propagation speed of stokes light and anti-stokes light in the same fiber was different because of dispersion effect. The two kinds of reflected light were obtained by photoelectric converter at different time when the scattering occurred at the same place. Therefore, there was a time warping between the two signals after data acquisition. This phenomenon would lead to measurement error in the process of demodulating temperature. A new method of error correction for the distributed temperature measurement system was used to eliminate the signal dislocation by correcting the stokes signal. In the absence of correction, the antistokes signal peak and the stokes signal peak occurred in different place, which leaded to errors in the process of demodulating temperature. This correcting method was used. The demodulation error was reduced from 2.3 °C to 1.2 °C. The shortest time was 4.96s when detected temperature rise rate was not less than 5 °C/min in the case of 10km fiber carried by this system. It was showed that this technique could improve the performance of the traditional distributed fiber Raman temperature measurement system, and it would have a good aspect.

Paper Details

Date Published: 20 February 2018
PDF: 6 pages
Proc. SPIE 10697, Fourth Seminar on Novel Optoelectronic Detection Technology and Application, 1069721 (20 February 2018); doi: 10.1117/12.2315217
Show Author Affiliations
Jiacheng Hu, China Jiliang Univ. (China)
Qian Cong, Shanghai Aerospace Device Manufacturing (China)
Zijian Wang, China Jiliang Univ. (China)
Guoyang Li, Shanghai Institute of Optics and Fine Mechanics (China)
Zeguo Liu, China Jiliang Univ. (China)

Published in SPIE Proceedings Vol. 10697:
Fourth Seminar on Novel Optoelectronic Detection Technology and Application
Weiqi Jin; Ye Li, Editor(s)

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