2024
DOI: 10.1088/1361-6463/ad32f2
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Ultra-sensitive fiber optic sensor for glucose concentration measurement based on Vernier effect in cascaded Mach–Zehnder interferometers

Sa Zhang,
Hailiang Chen,
Xiaoya Fan
et al.

Abstract: In this paper, a fiber optic glucose concentration sensor based on cascaded Mach-Zehnder interferometers (CMZIs) was proposed and experimentally verified. Two single-mode fibers (SMFs) with slightly different tapering lengths and as well free spectral ranges (FSRs) were obtained through the melt-drawn cones technique and then were cascaded together to achieve the vernier effect (VE). Experimental results showed that the measurement sensitivity of glucose concentration based on a single tapered SMF was 0.0494 n… Show more

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