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Proceedings Article

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

[+] Author Affiliations
Wu Yuan, Ole Bang

Technical Univ. of Denmark (Denmark)

Graham E. Town

Macquarie Univ. (Australia)

Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75035A (October 05, 2009); doi:10.1117/12.835326
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From Conference Volume 7503

  • 20th International Conference on Optical Fibre Sensors
  • Julian D. C. Jones
  • Edinburgh, United Kingdom | October 05, 2009

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).

© (2009) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Wu Yuan ; Graham E. Town and Ole Bang
"Ultrasensitive refractive index sensor based on twin-core photonic bandgap fibers", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75035A (October 05, 2009); doi:10.1117/12.835326; http://dx.doi.org/10.1117/12.835326


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