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A Fabry-Perot Interferometer Strain Sensor Based on Concave-Core Photonic Crystal Fiber

  • Jiajun Tian*
  • , Yuzhu Jiao
  • , Qi Fu
  • , Shaobo Ji
  • , Zhigang Li
  • , Mingran Quan
  • , Yong Yao
  • *Corresponding author for this work
  • Harbin Institute of Technology Shenzhen

Research output: Contribution to journalArticlepeer-review

Abstract

A high-sensitivity Fabry-Perot interferometer (FPI) strain sensor based on a concave-core photonic crystal fiber (CPCF) was proposed and demonstrated. The FPI was formed by directly splicing a CPCF to a standard single-mode fiber. The CPCF was fabricated by cleaving a high-numerical-aperture solid-core photonic crystal fiber under axial tension using a traditional fiber cleaver. An FPI strain sensor with a cavity length of 4.85 μ m and a strain sensitivity of 31.58 pm/μϵ was successfully produced. The sensor also demonstrated a low temperature sensitivity of 0.653 pm/°C, reducing the cross-sensitivity between tensile strain and temperature. The benefits of the proposed sensor include simple fabrication, high strain sensitivity, and low temperature cross-sensitivity, making it attractive for practical applications.

Original languageEnglish
Article number8267257
Pages (from-to)1952-1958
Number of pages7
JournalJournal of Lightwave Technology
Volume36
Issue number10
DOIs
StatePublished - 15 May 2018
Externally publishedYes

Keywords

  • Fabry-Perot interferometer
  • concave-core photonic crystal fiber
  • fiber sensor

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