Chemical vapor sensors based on whispering gallery modes in an optical fiber micro-resonator coated with a polymer layer

Nai Lin, Lan Jiang*, Sumei Wang, Qianghua Chen, Darang Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

This study proposes a chemical vapor sensor using whispering gallery modes excited in an optical fiber-based resonator. A standard optical fiber with its plastic buffer removed is coated with a polymer layer to act as the vapor-sensitive optical resonator. Theoretical simulations of the sensor response, including the refractive index sensitivity and detection limit, are performed as a function of the polymer layer thickness. Calculations show that the sensor exhibits a very good linearity and a low detection limit on the order of 10 6 refractive index unit. The theoretical predications also provide guidelines for the design and fabrication of optical fiber-based whispering gallery mode resonators in chemical sensing.

Original languageEnglish
Pages (from-to)263-276
Number of pages14
JournalFiber and Integrated Optics
Volume31
Issue number4
DOIs
Publication statusPublished - 27 Jul 2012

Keywords

  • chemical vapor sensor
  • optical micro-resonator
  • polymer
  • whispering gallery modes

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