A macrobending singlemode fiber refractive index sensor for low refractive index liquids


  • Pengfei Wang Dublin Institute of Technology
  • Yuliya Semenova Dublin Institute of Technology
  • Yong Li Dublin Institute of Technology
  • Qiang Wu Dublin Institute of Technology
  • Gerald Farrell Dublin Institute of Technology




An all-fiber refractive index sensor with a simple configuration is proposed and investigated. The proposed fiber refractometer consists of a full-loop structure of bare high-bend loss singlemode fiber-1060XP, employing the well-known whispering gallery mode (WGM) effect induced by the evanescent wave excitation to measure the refractive index of an external medium. A competitive sensitivity is achieved (average 725.76nm/RIU at a bend diameter of 19.3mm) compared with other fiber-optic sensors, plus benefits resulting from simplicity, low cost and ease of fabrication.

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How to Cite

P. Wang, Y. Semenova, Y. Li, Q. Wu, and G. Farrell, “A macrobending singlemode fiber refractive index sensor for low refractive index liquids”, Photonics Lett. Pol., vol. 2, no. 2, pp. pp. 67–69, Jun. 2010.