Mid-infrared evanescent wave sensor based on side-polished chalcogenide fiber

Yitao Yang, Kaixin Ge, Pan Tao, Shixun Dai, Xunsi Wang, Wei Zhang, Tiefeng Xu, Yin Wang, Ting Jung Lin, Peiqing Zhang

Research output: Journal PublicationArticlepeer-review

Abstract

A highly sensitive mid-infrared evanescent wave sensor based on side-polished (SPF) chalcogenide fiber (ChG) was proposed in this work. The optimum optical fiber parameters were determined via numerical simulation by detecting the leakage intensity of evanescent waves from the optical fiber of different polish depths. The SPF remarkably enhanced the evanescent wave sensing while maintaining fiber loss and strength. Graphene oxide (GO) was coated on the fiber to enhance the sensitivity of SPF sensor for butane (C4H10). GO has a great specific surface area and abundant oxygen-containing functional groups, which enlarges the contact area of GO with gas molecules and enables to adsorb gas. Results show that the GO-SPF sensor can be three and five times more sensitive than the original fiber optic sensor and SPF sensor for butane gas detection, and has a fast response time and good repeatability.

Original languageEnglish
JournalCeramics International
DOIs
Publication statusAccepted/In press - 2022
Externally publishedYes

Keywords

  • Chalcogenide glass fiber
  • Fiber sensor
  • Graphene oxide
  • Side-polished structure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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