Non-contact Fiber Optic Displacement Sensor for Sugar Concentration Detection

Abstract

A non-contact fiber optic displacement sensor was used for sugar concentration sensing. A concentric fiber optic bundle and sucrose solutions were used as the fiber probe and sugar samples respectively. Concentration of samples used were in the range of 9% to 33% weight percentages. The fiber probe was displaced above the sample surfaces and displacement curves were recorded. There were two peaks were observed in the displacement curve for each sample. The distance between peaks increases linearly as concentration increases and it was used to evaluate the sensing performance. In term of the performance, the sensitivity and linearity obtained were 0.08295 mm/% and 96% respectively.

Ultra-sensitive fiber optic sensor for glucose concentration measurement based on Vernier effect in cascaded Mach–Zehnder interferometers

“…In 2019, Zhang et al proposed an optical flow polymer MZI based on direct laser writing (DLW) at the fiber tip for the determination of analytes such as glucose solutions at different concentrations with a sensitivity of 593.75 nm/RIU [15]. In 2020, Johari et al proposed a non-contact fiber optic displacement sensor for glucose concentration detection with a sensitivity of 0.08295 nm/% and linearity of 96% [16]. In 2022, Wang et al proposed a dual-channel SPR based glucose sensor with a concentration sensitivity of 2.99 nm/% [17].…”