Photonic Sensors

, Volume 7, Issue 2, pp 105–112 | Cite as

Numerical investigation into a surface plasmon resonance sensor based on optical fiber microring

  • Chunliu Zhao
  • Yanru Wang
  • Dongning Wang
  • Zhewen Ding
Open Access


A reflective surface plasmon resonance (SPR) sensor based on optical fiber microring is proposed. In such a sensor, plasmons on the outer surface of the metallized channels containing analyte can be excited by a fundamental mode of a thin-core fiber (TCF). The refractive index (RI) sensing can be achieved as the surface plasmons are sensitive to changes in the refrective index of the analyte. Numerical simulation results show that the resonance spectrum shifts toward the shorter wavelength gradually when the analyte refractive index increases from 1.0 to 1.33, whereas it shifts toward the longer wavelength gradually when the analyte refractive index increases from 1.33 to 1.43, and there is a turning point at the refractive index value of 1.33. The highest sensitivity achieved is up to 2.30×103 nm/RIU near the refractive index value of 1.0. Such a compact sensor has potential in gaseous substance monitoring.


Fiber optics surface plasmons sensors microstructure 



This work was supported by the Natural Science Foundation of Zhejiang Province China under Grant No.LY17F050010.


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© The Author(s) 2017

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  • Chunliu Zhao
    • 1
  • Yanru Wang
    • 1
  • Dongning Wang
    • 1
  • Zhewen Ding
    • 1
  1. 1.Institute of Optoelectronic TechnologyChina Jiliang UniversityHangzhouChina

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