Highly sensitive biosensor based on a microstructured photonic crystal fibre for alcohol sensing
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Date
2023-04-15
Journal Title
Journal ISSN
Volume Title
Publisher
Elseiver
Abstract
A microstructure alcohol biosensor has been proposed to operate in the wavelength range of 0.8 to 2.0 μm for the
sensing of propanol, butanol, and pentanol, unveiling impressive results of relative sensitivity and confinement
loss. The results are achieved by implementing closely arranged cladding air holes of 3 rings with a single
elliptical core hole for analyte infiltration. Performance evaluation of the sensor was conducted using COMSOL
Multiphysics software and yields relative sensitivity of 96.75%, 89.60%, and 82.02% for propanol, butanol, and
pentanol, respectively, and confinement losses of 5.49 × 10 12 dB/m for propanol, 1.98 × 10 12 dB/m for
butanol, and 9.36 × 10 13 dB/m for pentanol. Other optical parameters have also been analysed that recorded
effective refractive index, high power fraction, low birefringence, small effective area, and large nonlinear co-
efficients. The proposed biosensor is eligible for practical application in alcohol sensing with these results.
Moreover, this proposed biosensor is suitable as a supercontinuum source in optical communication systems
because of the high nonlinear coefficients.
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This research article was published by Elsevier 2023
Keywords
Photonic crystal fibre, Relative sensitivity