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Proceedings Paper

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

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75035A (5 October 2009); doi: 10.1117/12.835326
Show Author Affiliations
Wu Yuan, Technical Univ. of Denmark (Denmark)
Graham E. Town, Macquarie Univ. (Australia)
Ole Bang, Technical Univ. of Denmark (Denmark)

Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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