Abstract
We report an innovative design of a multi-core photonic crystal fibre-based surface plasmon resonance temperature sensor using ethanol and benzene as temperature-sensitive materials with a segmented outer-surface metal coating scheme. A stable sensing performance for a detection range of 10–80 ∘ C was found while using ethanol as the temperature-sensitive material; while using benzene both blue and red frequency shifts were observed. The maximum temperature sensitivities obtained from this proposed temperature sensor were 360 pm/ ∘ C and 23.3 nm/ ∘ C with resolutions of 2.78 × 10 − 1 ∘ C and 4.29 × 10 − 3 ∘ C, respectively, when using ethanol or benzene as the sensing medium.
Highlights
In recent years, researchers have shown more interest in developing temperature sensors that are capable of remote sensing, easy to fabricate, light weight, economical, immune to electromagnetic interference or radiation [1] and so on
photonic crystal fibres (PCFs) are widely used for various applications, because it has been proven that by controlling and manipulating the cross-sectional structural parameters, namely, air hole diameter and the pitch length, it is possible to engineer their optical characteristics [3]
The sensor performance of this PCF sensor was studied in terms of temperature sensitivity, resolution, figure of merit (FOM) and linearity of confinement loss peak wavelength
Summary
Researchers have shown more interest in developing temperature sensors that are capable of remote sensing, easy to fabricate, light weight, economical, immune to electromagnetic interference or radiation [1] and so on. This is as a result of the significant role of temperature in various fields, such as environmental monitoring, manufacturing, medicine, quantum computing and many other applications. PCFs are widely used for various applications, because it has been proven that by controlling and manipulating the cross-sectional structural parameters, namely, air hole diameter and the pitch length (gap between neighbouring holes), it is possible to engineer their optical characteristics [3]
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