Abstract
In this work, we design a D-shaped photonic-crystal fiber (PCF) sensor with a large-hole self-reference channel based on the surface plasmon resonance. Using the numerical calculation method, we study variations of the transmission spectrum with concentration for the aqueous glucose solution. By optimizing the silver-film thickness of the reference and detected channels, we find that the sensitivity does not depend on the silver-film thickness h of the self-reference channel at high glucose concentrations. The sensitivity is more influenced by the silver-film thickness H of the detected channel. Finally, we obtain the maximum sensitivity of the D-shape PCF sensor equal to 20.2 nm/(mg/ml) and the lower limit of detection equal to 2.5 μg/ml at the silver-film thickness of the detected channel H = 50.0 nm and the self-reference h = 40.0 nm.
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Gao, YX., Zhou, C. High-Sensitivity D-Shaped Fiber Sensor Based on a Large-Hole Self-Reference Channel for Glucose Aqueous Solution. J Russ Laser Res 41, 645–652 (2020). https://doi.org/10.1007/s10946-020-09919-0
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DOI: https://doi.org/10.1007/s10946-020-09919-0