Highly sensitive strain sensor based on a hollow-core fibre embedded SMS fibre structure

Ke Tian, Meng Zhang, Xin Wang, Gerald Farell, Pengfei Wang, Elfed Lewis

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A high sensitivity optical fibre strain sensor based on a hollow-core fibre embedded single-mode-multimode-singlemode (HESMS) fibre structure is described. The HESMS fibre structure is fabricated by connecting a length of hollowcore fibre (HCF) between two sections of multimode fibre (MMF). The embedded HCF acts as a Fabry-Perot cavity, and therefore a composite interference pattern based on the inherent multimode interference (MMI) and the introduced Fabry-Perot interferometer (FPI) is established. This resultant composite interference greatly improves the performance of the SMS fibre structure for strain sensing. A maximum strain sensitivity of-2.71 pm/μ over the strain range of 700-1200 μ is achieved experimentally. Benefiting from the simple fabrication process, this low-cost, high sensitivity strain sensor can be realistically applied in many areas where high-Accuracy strain measurement is required.

Original languageEnglish
Title of host publicationSeventh European Workshop on Optical Fibre Sensors
EditorsKyriacos Kalli, Gilberto Brambilla, Sinead O'Keeffe
PublisherSPIE
ISBN (Electronic)9781510631236
DOIs
Publication statusPublished - 2019
Event7th European Workshop on Optical Fibre Sensors, EWOFS 2019 - Limassol, Cyprus
Duration: 1 Oct 20194 Oct 2019

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11199
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference7th European Workshop on Optical Fibre Sensors, EWOFS 2019
Country/TerritoryCyprus
CityLimassol
Period1/10/194/10/19

Keywords

  • Composite interference
  • Fabry-Perot interferometer
  • Multimode interference
  • Strain measurement.

Fingerprint

Dive into the research topics of 'Highly sensitive strain sensor based on a hollow-core fibre embedded SMS fibre structure'. Together they form a unique fingerprint.

Cite this