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

Chen, George Y., Codemard, Christophe A., Lewis, Richard J. ORCID: https://orcid.org/0000-0003-1859-0021, 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:	Schools > Biosciences
Subjects:	Q Science > Q Science (General)
Publisher:	The Optical Society
ISSN:	0146-9592
Last Modified:	27 Oct 2022 08:30
URI:	https://orca.cardiff.ac.uk/id/eprint/62534

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