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Independent measurement of refractive index and temperature using D-gapped dual-channel structure in a photonic crystal fiber

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Abstract

A dual-channel sensor was proposed by further processing a gap on the D-shaped surface of a photonic crystal fiber (PCF). The simultaneous and independent measurement for refractive index (RI) and temperature was theoretically demonstrated. On the dual-channel surfaces, the Ag films were elaborated to improve the sensing performance for RI based on surface plasmon resonance (SPR) effect. The sensing performance of the temperature channel was improved by further-overlaying the polydimethylsiloxane (PDMS) film. Furthermore, the TiO2 film was introduced to protect the silver away from oxidation and optimized the sensing performance. When the thickness of Ag film is 45 nm and the thickness of TiO2 film is 13 nm, the highest sensitivities of RI and temperature were respectively obtained as 6700 nm/RIU and − 21 nm/°C.

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The datasets can be accessed from the corresponding author on reasonable request.

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Funding

This work was supported by the National Key R & D Program of China (2019YFB2006001), and Hebei Natural Science Foundation (F2020501040).

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Authors and Affiliations

  1. College of Information Science and Engineering, Northeastern University, Shenyang, 110819, China

    Mingjun Tian, Jin Li & Fanli Meng

  2. Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Qinhuangdao, 066004, China

    Jin Li

Authors
  1. Mingjun Tian
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  2. Jin Li
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  3. Fanli Meng
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Contributions

MT. analyzed the data and plotted all figures; MT. and JL. wrote the main manuscript text; FM. revised the manuscript; All authors reviewed the manuscript and discussed the results.

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Correspondence to Jin Li.

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Tian, M., Li, J. & Meng, F. Independent measurement of refractive index and temperature using D-gapped dual-channel structure in a photonic crystal fiber. Opt Quant Electron 55, 301 (2023). https://doi.org/10.1007/s11082-023-04616-z

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