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

Scott Wu Yuan, Graham E. Town, Ole Bang

Research output: Contribution to conferencePaperResearchpeer-review

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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 (neven).
Original languageEnglish
Publication date2009
Publication statusPublished - 2009
Event20th International Conference on Optical Fibre Sensors - Edinburgh, United Kingdom
Duration: 5 Oct 20099 Oct 2009
Conference number: 20
http://ofs20.iop.org/

Conference

Conference20th International Conference on Optical Fibre Sensors
Number20
CountryUnited Kingdom
CityEdinburgh
Period05/10/200909/10/2009
Internet address

Keywords

  • directional coupler
  • photonic bandgap fiber
  • fiber sensor

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