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Strain, torsion and refractive index sensors based on helical long period fibre grating inscribed in small-core fibre for structural condition monitoring.
- Source :
- Advances in Structural Engineering; Apr2021, Vol. 24 Issue 6, p1248-1255, 8p
- Publication Year :
- 2021
-
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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13694332
- Volume :
- 24
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Advances in Structural Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 149706703
- Full Text :
- https://doi.org/10.1177/1369433221992485