Demodulation of the multi-peak fiber Bragg grating sensor based on partial wavelength scan

Pan Dai; Yu Zhou; Leilei Wang; Shangjing Liu; Xuping Zhang; Xiangfei Chen

doi:10.3788/COL202018.071201

Journals >Chinese Optics Letters >Volume 18 >Issue 7 >Page 071201 > Article

Chinese Optics Letters
Vol. 18, Issue 7, 071201 (2020)

Demodulation of the multi-peak fiber Bragg grating sensor based on partial wavelength scan

Pan Dai^1、2, Yu Zhou^1、2, Leilei Wang^1、2, Shangjing Liu^1、2, Xuping Zhang^1、2, and Xiangfei Chen^1、2、*

Author Affiliations

¹Key Laboratory of Intelligent Optical Sensing and Manipulation of the Ministry of Education, Institute of Optical Communication Engineering, Nanjing University, Nanjing 210093, China

²National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China

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DOI: 10.3788/COL202018.071201 Cite this Article Set citation alerts

Pan Dai, Yu Zhou, Leilei Wang, Shangjing Liu, Xuping Zhang, Xiangfei Chen. Demodulation of the multi-peak fiber Bragg grating sensor based on partial wavelength scan[J]. Chinese Optics Letters, 2020, 18(7): 071201 Copy Citation Text

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Abstract

Until now, a high-efficiency demodulation method for fiber Bragg grating (FBG) sensors has been a challenge. In this Letter, by employing multi-peak FBGs, an FBG sensor with a partial wavelength scan is proposed and initially demonstrated. By demodulating a near-symmetrical multi-peak FBG and an asymmetrical multi-peak FBG in the strain experiment, sensor sensitivities of 1.02 pm/με and 1.01 pm/με are measured for the interrogation system, respectively. The average demodulation deviations for the two sensors are 1.81% and 0.4%, respectively. The proposed method is expected to realize high-efficiency and low-cost FBG interrogators.

Keywords

fiber Bragg grating fiber sensor multi-peak fiber Bragg grating