Strain, torsion and refractive index sensors based on helical long period fibre grating inscribed in small-core fibre for structural condition monitoring

Cailing Fu, Yi Qing Ni, Tong Sun, Yiping Wang, Siqi Ding, Miodrag Vidakovic

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

This study is intended to develop long period fibre grating sensors for potential applications in environmental and durability monitoring of coastal structures. High-quality helical long period fibre gratings (HLPFGs) are inscribed in different types of small-core single mode fibre (SMF) by use of hydrogen-oxygen flame heating technique. A detailed investigation of the effect of core diameter on their transmission spectrum and optimum length of the HLPFG has been pursued. A longer length is required to achieve the same coupling attenuation in a smaller-core SMF than that of a larger-core fibre. The strain, torsion and refractive index (RI) properties of the HLPFG is investigated experimentally to develop a high-sensitivity sensor. The experimental results show that the strain sensitivity could be enhanced by means of employing a larger-core diameter SMF. Moreover, the HLFPGs are also sensitive to the torsion and external RI. Hence, such HLFPGs have great potential for sensing applications.

Original languageEnglish
Pages (from-to)1248-1255
Number of pages8
JournalAdvances in Structural Engineering
Volume24
Issue number6
DOIs
Publication statusPublished - Apr 2021

Keywords

  • coastal structures
  • Fibre optic components
  • fibre optic sensors
  • helical long period fibre gratings
  • structural health monitoring

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

Fingerprint

Dive into the research topics of 'Strain, torsion and refractive index sensors based on helical long period fibre grating inscribed in small-core fibre for structural condition monitoring'. Together they form a unique fingerprint.

Cite this