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Enhanced responsivity with skew ray excitation of reflection- and transmission-type refractometric sensors

Chen, George Y., Codemard, Christophe A., Lewis, Richard J., Jankowski, Lukasz, Chan, Jaclyn S., Gorman, Philip M. and Zervas, Michalis N. 2014. Enhanced responsivity with skew ray excitation of reflection- and transmission-type refractometric sensors. Optics Letters 39 (13) , pp. 3822-3825. 10.1364/OL.39.003822

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Abstract

The responsivity of optical fibers to refractive index can be enhanced using high-order skew rays compared with using meridional rays. Skew rays can have a much higher number of reflections with increased interaction length along the core–cladding interface, which gives rise to stronger interactions with the external medium. Reflection/transmission-type refractometric sensors based on twin-coupled-core and multimode fibers showed one/two orders of magnitude increase in responsivity with skew ray excitation. The responsivity and sensitivity for the two types are ∼2000%/RIU, ∼1400%/RIU, and 4.9×10−5  RIU, 7.0×10−5  RIU, respectively.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Subjects: Q Science > Q Science (General)
Publisher: The Optical Society
ISSN: 0146-9592
Last Modified: 19 Feb 2019 15:40
URI: http://orca.cf.ac.uk/id/eprint/62534

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