High temperature high sensitivity optical fibre sensor based on multimode fibre Bragg grating

Qijing Lin; Na Zhao; Weile Jiang; Kun Yao; Bian Tian; Peng Shi; Feng Chen

High temperature high sensitivity optical fibre sensor based on multimode fibre Bragg grating

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Author(s): Qijing Lin^{1, 2, 3, 4} ; Na Zhao¹ ; Weile Jiang⁵ ; Kun Yao¹ ; Bian Tian¹ ; Peng Shi⁶ ; Feng Chen¹
- Affiliations: 1: State Key Laboratory for Manufacturing Systems Engineering , Xi'an Jiaotong University , Xi'an 710049 , People's Republic of China ;
  2: Collaborative Innovation Center of High-End Manufacturing Equipment , Xi'an Jiaotong University , Xi'an, 710054 , People's Republic of China ;
  3: State Key Laboratory of Digital Manufacturing Equipment & Technology , Huazhong University of Science and Technology , Wuhan, 430074 , People's Republic of China ;
  4: State Key Laboratory of Fluid Power and Mechatronic Systems , Zhejiang University , Hanzhou, 310027 , People's Republic of China ;
  5: Institute of Heritage Sites & Historical Architecture Conservation, Xi'an Jiaotong University , Xi'an 710049 , People's Republic of China ;
  6: Electronic Materials Research Laboratory , Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic and Information Engineering, Xi'an Jiaotong University , Xi'an 710049 , People's Republic of China
Source: Volume 13, Issue 11, November 2018, p. 1537 – 1541
DOI: 10.1049/mnl.2018.5233 , Online ISSN 1750-0443

Received 28/05/2018, Accepted 11/10/2018, Revised 29/09/2018, Published 01/11/2018

A multimode fibre Bragg grating (MMFBG) is experimentally demonstrated in this work. The light from the lead-in optical fibre transmits to the MMFBG, the Bragg gratings in multimode fibres show multiple reflection peaks due to the coupling among all bounded modes. Some reflection peaks are reflected back to the lead-out fibre core by the MMFBG. Finally, the spatial frequency spectra of the reflection peaks are detected by the detection device. As the temperature variates, the changes in the transmission spectrum will be observed. Experimental results show that the MMFBG responds to temperature and the temperature sensitivity is 0.0114 nm/^oC. The MMFBG has the advantages of compact structure, anti-electromagnetic interference, and stable chemical property, which has great potential in temperature measurement.

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High temperature high sensitivity optical fibre sensor based on multimode fibre Bragg grating

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