High-Sensitivity D-Type PCF-SPR Dual-Functional Sensor: Optimization by the Taguchi Method
摘要
A high-sensitivity D-type PCF-SPR sensor is designed to detect both the refractive index of the analyte and temperature. In order to reduce the difficulty of splicing the sensor with the general single-mode fiber in manufacturing, the cladding diameter of the sensor is set to 125 μm, which is the same as the diameter of the general single-mode fiber. The Taguchi method is adopted to optimize the structural parameters of the sensor for temperature detection, and the ANOVA method is employed to assess the influence of each structural parameter on the loss of the sensor core. The results show that the refractive index range, wavelength sensitivity, resolution, and optimal quality factor are 1.31–1.415, 46,000 nm/RIU, 2.17 × 10−6 RIU, and 224.69 RIU−1, respectively. In temperature sensing, the temperature range, wavelength, resolution, optimal quality factor, and maximum signal-to-noise ratio are 5–105 °C, 20 nm/°C, 5 × 10−3 °C, 5.36 × 10−2 °C−1, and 37.89 dB, respectively. The simple sensor, which is easy to manufacture and has strong anti-interference ability and excellent sensing properties, has large potential in environmental monitoring, industrial automation, medical diagnosis, and other fields.