Ultrasensitive refractive index sensor based on twin-core photonic bandgap fibers

Wu Yuan, Graham E. Town, Ole Bang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We have theoretically investigated twin-core all-solid photonic bandgap fibers (PBGFs) for evanescent wave sensing of refractive index within one single microfluidic analyte channel centered between the two cores. The sensor can achieve ultrahigh sensitivity by detecting the change in transmission. We find novel features in the sensing characteristics: the sensitivity is higher at the short wavelength edge of a bandgap than at the long wavelength edge, the effective index of the odd supermode (nodd) is more sensitive to ambient refractive index change compared with that of the even supermode (n even).

Original languageEnglish (US)
Title of host publication20th International Conference on Optical Fibre Sensors
DOIs
StatePublished - Nov 17 2009
Externally publishedYes
Event20th International Conference on Optical Fibre Sensors - Edinburgh, United Kingdom
Duration: Oct 5 2009Oct 9 2009

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7503
ISSN (Print)0277-786X

Other

Other20th International Conference on Optical Fibre Sensors
CountryUnited Kingdom
CityEdinburgh
Period10/5/0910/9/09

Keywords

  • Directional coupler
  • Fiber sensor
  • Photonic bandgap fiber

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Yuan, W., Town, G. E., & Bang, O. (2009). Ultrasensitive refractive index sensor based on twin-core photonic bandgap fibers. In 20th International Conference on Optical Fibre Sensors [75035A] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7503). https://doi.org/10.1117/12.835326