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<p>An H-type PCF-SPR sensor is designed and demonstrated to detect the refractive index (RI) of analytes. In order to reduce the difficulty of splicing photonic crystal fibers with single-mode fibers in practical applications, the diameter of the sensor is 125&#xa0;μm. The key structural parameters of the sensor are optimized by the Taguchi method, and the influence of each structural parameter on the loss curve of the sensor is analyzed by the variance method. A multiple linear regression equation is derived to predict the losses for different parameters. The results show that the RI range, maximum wavelength sensitivity, optimal resolution, and maximum signal-to-noise ratio are 1.3–1.415, 14,000&#xa0;nm/RIU, 7.14 × 10<sup>−6</sup> RIU, and 34.37&#xa0;dB, respectively. Because the sensor is simple and easy to manufacture and has excellent properties and strong anti-interference ability, it has large potential in various fields, including the biomedical, environmental, aerospace, and chemical industries.</p>

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High-Sensitivity H-Type PCF-SPR Sensor Optimized by the Taguchi Method

  • 期刊论文

  • 发表日期：

    2025年8月23日

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  • Liying Xu,
  • Jingwei Lv,
  • Famei Wang,
  • Wei Liu,
  • Zao Yi,
  • Miao Liu,
  • Jianxin Wang,
  • Qiang Liu,
  • Paul K. Chu,
  • Chao Liu

摘要

An H-type PCF-SPR sensor is designed and demonstrated to detect the refractive index (RI) of analytes. In order to reduce the difficulty of splicing photonic crystal fibers with single-mode fibers in practical applications, the diameter of the sensor is 125 μm. The key structural parameters of the sensor are optimized by the Taguchi method, and the influence of each structural parameter on the loss curve of the sensor is analyzed by the variance method. A multiple linear regression equation is derived to predict the losses for different parameters. The results show that the RI range, maximum wavelength sensitivity, optimal resolution, and maximum signal-to-noise ratio are 1.3–1.415, 14,000 nm/RIU, 7.14 × 10−6 RIU, and 34.37 dB, respectively. Because the sensor is simple and easy to manufacture and has excellent properties and strong anti-interference ability, it has large potential in various fields, including the biomedical, environmental, aerospace, and chemical industries.