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Proceedings Paper

Synchronous interrogation of multiple FBG sensors using multi-wavelength parallel swept light source
Author(s): Diannan Hu; Zhaoying Wang; Quan Yuan; Taoran Xie; Dongfang Jia
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Paper Abstract

In this paper, a multi-wavelength parallel swept light source (MWPSS) is proposed for fiber Bragg grating (FBG) interrogation. The MWPSS has two main parts: a multi-wavelength light source used as a seed source and a synchronous lightwave synthesized frequency sweeper (SLSFS). The multi-wavelength of the seed source is shifted with a constant frequency sweeping step synchronously every circulation in the SLSFS. There is a one-to-one correspondence between the swept range of the seed source and the central reflection wavelength of each FBG sensor. By interrogating the data of reflection intensity in time-domain to calculate the difference between the center wavelength of each sensing FBG and the reference FBG, 10.055±0.005pm/°C temperature sensitivity and 1.614±0.002pm/με static strain sensitivity were obtained synchronously without cross-talk.

Paper Details

Date Published: 23 October 2018
PDF: 6 pages
Proc. SPIE 10821, Advanced Sensor Systems and Applications VIII, 1082115 (23 October 2018); doi: 10.1117/12.2327121
Show Author Affiliations
Diannan Hu, Tianjin Univ. (China)
Zhaoying Wang, Tianjin Univ. (China)
Quan Yuan, Tianjin Univ. (China)
Taoran Xie, Tianjin Univ. (China)
Dongfang Jia, Tianjin Univ. (China)

Published in SPIE Proceedings Vol. 10821:
Advanced Sensor Systems and Applications VIII
Tiegen Liu; Shibin Jiang, Editor(s)

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