Simultaneous measurement of temperature and magnetic field based on surface plasmon resonance and Sagnac interference in a D-shaped photonic crystal fiber

  • Hai LiuEmail author
  • Hongwei Li
  • Qing Wang
  • Meng Wang
  • Yi Ding
  • Chenghao Zhu


A novel D-shaped photonic crystal fiber (PCF) sensor based on surface plasmon resonance (SPR) and Sagnac interference technology is proposed to realize the simultaneous measurement of temperature and magnetic field. Two ultra-large air-holes are introduced into the cladding layer to increase the birefringence. Magnetic fluid (MF) material is filled into the cladding air-holes to measure the temperature and magnetic field based on the dependence of the MF refractive index (RI) on temperature and magnetic field. The D-shaped flat surface coated with a gold layer is in direct contact with ethanol to achieve the dual-parameter demodulation and solve the cross-sensitivity problem. The proposed sensor has the advantages of high sensitivity and easy fabrication for the multi-parameter measurement applications.


Photonic crystal fiber Surface plasmon resonance Sagnac interference Fiber sensing 



This work is supported by “the Fundamental Research Funds for the Central Universities” (Grant No. 2018QNA40, China University of Mining and Technology).


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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Hai Liu
    • 1
    Email author
  • Hongwei Li
    • 1
  • Qing Wang
    • 1
  • Meng Wang
    • 1
  • Yi Ding
    • 1
  • Chenghao Zhu
    • 1
  1. 1.School of Information and Control EngineeringChina University of Mining and TechnologyXuzhouChina

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