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

Wu Yuan; Graham E. Town; Ole Bang

doi:10.1117/12.835326

5 October 2009 Ultrasensitive refractive index sensor based on twin-core photonic bandgap fibers

Wu Yuan, Graham E. Town, Ole Bang

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75035A (2009) https://doi.org/10.1117/12.835326
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

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 (n_odd) is more sensitive to ambient refractive index change compared with that of the even supermode (n_even).

Citation Download 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 (5 October 2009); https://doi.org/10.1117/12.835326

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