Simultaneous measurement of strain and temperature by two peanut tapers with embedded fiber Bragg grating

Lingya Lv, Sumei Wang, Lan Jiang, Fei Zhang, Zhitao Cao, Peng Wang, Yi Jiang, Yongfeng Lu

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

A compact optical fiber sensor for simultaneous measurement of strain and temperature is designed and experimentally investigated. The proposed sensor consists of a two-peanut-taper Mach-Zehnder interferometer (MZI) and in-line embedded fiber Bragg grating (FBG). The sensor at a length of 35 mm presents strain sensitivities 1.07 pm/μe and 0.891 pm/μe, the temperature sensitivities are 55.35 pm/°C and 10.85 pm/°C, for MZI and FBG, respectively. Through tapering the center of the sensor by a fusion splicer, the strain sensitivity of the MZI is improved to 1.93 pm/μe. The resolutions for strain and temperature measurement are ±3.104 μe and ±0.194°C with the wavelength resolution of 5 pm. The experimental results show that the sensor is able to simultaneously measure strain and temperature by sensitivity matrix with advantages such as simple structure, compact size, ease of fabrication, low cost, etc.

Original languageEnglish (US)
Pages (from-to)10678-10683
Number of pages6
JournalApplied optics
Volume54
Issue number36
DOIs
StatePublished - Dec 20 2015

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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