Implementation of optical chemsensors based on HF-etched fibre Bragg grating structures

Kaiming Zhou, Xianfeng F. Chen, Lin Zhang, Ian Bennion

Research output: Contribution to journalArticle

Abstract

High-sensitivity optical chemsensors have been implemented by exploiting fibre Bragg grating structures UV-inscribed in D-shape, single-mode and multimode fibres and post-sensitized by hydrofluoric acid (HF) etching treatment. We have demonstrated that the Bragg grating structures which are intrinsically insensitive to chemicals can be sensitized by effective etching. All etched devices possess refractive index sensing capability that offers an encoding function to chemical concentrations. Most etched devices have been used to measure the concentrations of sugar solutions, showing a potential capability of detecting concentration changes as small as 0.1–0.5%.
Original languageEnglish
Pages (from-to)1140-1145
Number of pages6
JournalMeasurement Science and Technology
Volume17
Issue number5
DOIs
Publication statusPublished - Apr 2006

Keywords

  • fibre Bragg grating
  • tilted fibre grating
  • chemsensor
  • HF etching
  • multimode fibre
  • D-shape fibre

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