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

Scott Wu Yuan; Graham E. Town; Ole Bang

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

Scott Wu Yuan, Graham E. Town, Ole Bang

Macquarie University

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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 language	English
Publication date	2009
Publication status	Published - 2009
Event	20th International Conference on Optical Fibre Sensors - Edinburgh, United Kingdom Duration: 5 Oct 2009 → 9 Oct 2009 Conference number: 20 http://ofs20.iop.org/

Conference

Conference	20th International Conference on Optical Fibre Sensors
Number	20
Country/Territory	United Kingdom
City	Edinburgh
Period	05/10/2009 → 09/10/2009
Internet address	http://ofs20.iop.org/

Keywords

directional coupler
photonic bandgap fiber
fiber sensor

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title = "Ultrasensitive refractive index sensor based on twin-core photonic bandgap fibers",

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).",

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author = "Yuan, {Scott Wu} and Town, {Graham E.} and Ole Bang",

year = "2009",

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note = "20th International Conference on Optical Fibre Sensors, OFS-20 ; Conference date: 05-10-2009 Through 09-10-2009",

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AU - Yuan, Scott Wu

AU - Town, Graham E.

AU - Bang, Ole

N1 - Conference code: 20

PY - 2009

Y1 - 2009

N2 - 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).

AB - 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).

KW - directional coupler

KW - photonic bandgap fiber

KW - fiber sensor

M3 - Paper

T2 - 20th International Conference on Optical Fibre Sensors

Y2 - 5 October 2009 through 9 October 2009

ER -

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

Abstract

Conference

Keywords

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