Fabrication of a fluorophore-doped cylindrical waveguide structure using elastomers for visual detection of stress

Chie Hirose, Nobuko Fukuda, Takafumi Sassa, Koji Ishibashi, Tsuyoshi Ochiai, Rei Furukawa

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

A fiber-optic strain sensor that can show strain via color change and which can be viewed using human eyes has demand in the civil engineering field for alerting purposes. A previous sensor was fabricated using PMMA (Poly(methyl methacrylate)), which had the exceeding hardness to exhibit satisfactory sensor performance. In this research, an elastomer-based fiber-optic structure was fabricated to enhance the elastic response of such sensors and to enlarge the waveguide cross section. Various organic fluorophores were added to the core and cladding regions of the elastic waveguide to induce energy flow from the core to the cladding when stress is applied to the waveguide. Elastomer pairs suitable for the core and cladding were selected from among several candidate materials having high transparency. A method of dispersing fluorophores to each host elastomer and constructing an excellent core-cladding interface using the selected materials was proposed. To investigate the time-dependent changes in the fluorescence of the doped elastomer waveguide, the absorption and emission spectra were monitored after the host elastomers were cured.

Original languageEnglish
Article number37
JournalFibers
Volume7
Issue number5
DOIs
Publication statusPublished - 2019
Externally publishedYes

Keywords

  • Elastomers
  • Fluorophores
  • Optical fibers
  • Strain sensor

ASJC Scopus subject areas

  • Ceramics and Composites
  • Civil and Structural Engineering
  • Biomaterials
  • Mechanics of Materials

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