Chinese Optics Letters, 2020, 18 (7): 071201, Published Online: Jun. 15, 2020   

Demodulation of the multi-peak fiber Bragg grating sensor based on partial wavelength scan Download: 877次

Author Affiliations
1 Key Laboratory of Intelligent Optical Sensing and Manipulation of the Ministry of Education, Institute of Optical Communication Engineering, Nanjing University, Nanjing 210093, China
2 National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
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.

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.

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