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<p>Refractive index and temperature are two basic properties of matter that have found widespread applications in various aspects of daily life. Therefore, we propose an improved dual-parameter sensor based on microstructured optical fiber (MOF). It can simultaneously measure temperature and refractive index (RI). The sensor structure comprises photonic crystal fiber (PCF), metal silver, and polydimethylsiloxane (PDMS). Metallic silver is used to excite the SPR effect, and PDMS is a suitable temperature-sensitive material. The sensor is based on a double-sided polished MOF featuring two orthogonal polarization sensing channels. The silver film is deposited on the left side of PCF for RI measurement. Silver film and PDMS are deposited on the top of PCF for temperature measurement. Simulation results show that the sensor exhibits a RI maximum spectral sensitivity of 9000&#xa0;nm/RIU over a liquid RI range of 1.270–1.415 and a maximum spectral temperature sensitivity of 7&#xa0;nm/°C over a temperature range of 10 to 180&#xa0;°C. The sensor has the advantages of wide temperature measurement range, low temperature and RI crosstalk, compact structure, and high fabrication tolerance. It has good application prospects in biochemical detection, environmental monitoring, medical sensing, and other fields.</p>

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Low-Crosstalk Refractive Index-Temperature Synchronized Detection Sensor Based on PCF-SPR in a Wide Temperature Domain

  • 期刊论文

  • 发表日期：

    2025年7月30日

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  • Jiahui Li,
  • Xili Jing,
  • Zhiyong Yin,
  • Mingshi Song,
  • Shuguang Li

摘要

Refractive index and temperature are two basic properties of matter that have found widespread applications in various aspects of daily life. Therefore, we propose an improved dual-parameter sensor based on microstructured optical fiber (MOF). It can simultaneously measure temperature and refractive index (RI). The sensor structure comprises photonic crystal fiber (PCF), metal silver, and polydimethylsiloxane (PDMS). Metallic silver is used to excite the SPR effect, and PDMS is a suitable temperature-sensitive material. The sensor is based on a double-sided polished MOF featuring two orthogonal polarization sensing channels. The silver film is deposited on the left side of PCF for RI measurement. Silver film and PDMS are deposited on the top of PCF for temperature measurement. Simulation results show that the sensor exhibits a RI maximum spectral sensitivity of 9000 nm/RIU over a liquid RI range of 1.270–1.415 and a maximum spectral temperature sensitivity of 7 nm/°C over a temperature range of 10 to 180 °C. The sensor has the advantages of wide temperature measurement range, low temperature and RI crosstalk, compact structure, and high fabrication tolerance. It has good application prospects in biochemical detection, environmental monitoring, medical sensing, and other fields.