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June 6, 2026Gongneng cailiao yu qijian xuebaoOpen Access

Structural design and performance simulation of a fiber optic SPR sensor

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Authors

ZHZhaotian HANLGLijun GUO

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Overview

Randomized trial examines the detection range of a fiber optic SPR sensor, suggesting optimal design parameters for biosensing applications.

Key Points

  • This study aims to enhance fiber optic SPR sensor performance through structural design and simulation.
  • Designed a side-polished optical fiber SPR biosensor for wide-range refractive index detection.
  • Utilized finite element method via COMSOL Multiphysics to investigate structural parameters affecting sensor performance.
  • Analyzed core refractive index, core diameter, sensing region length, metal film material, and ambient temperature on sensitivity and quality factors.
  • Core refractive index must exceed 1.443 RIU for optimal detection of biological samples with refractive indices of 1.315-1.443 RIU.
  • Sensitivity remains approximately 8000 nm/RIU while FWHM decreases from 179.09 nm to 130.22 nm as core diameter increases from 50 μm to 200 μm.
  • Silver offers the sharpest resonance peak, while gold provides best chemical stability, leading to the most effective overall sensor performance.

Cite This Study

HAN et al. (2026) studied this question.

synapsesocial.com/papers/6a23b94671a5da9775e752dahttps://doi.org/10.3724/jfmd.2603042
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