Journal
IEEE SENSORS JOURNAL
Volume 22, Issue 8, Pages 7785-7791Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2022.3155241
Keywords
Temperature sensors; Temperature measurement; Sensors; Sensitivity; Monitoring; Optical fiber sensors; Liquids; Hollow-core fiber; refractive index (RI) measurement; temperature measurement; surface plasmon resonance
Funding
- National Key Research and Development Program of China [2017YFA0701200]
- National Natural Science Foundation of China [61775032]
- Fundamental Research Funds for Central Universities [N2104022, N2004021]
- National Natural Science Foundation of the Science and Technology Department of Liaoning Province [2020-BS-046]
- China Postdoctoral Science Foundation [2021M690563]
- Hebei Natural Science Foundation [F2020501040]
- 111 Project [B16009]
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A dual-channel surface plasmon resonance (SPR) sensor based on hollow-core fiber (HCF) is proposed for simultaneous measurement of liquid refractive index (RI) and ambient temperature. The sensor achieves high sensitivity in a relatively wide measurement range by using the dual-wavelength matrix method to solve the cross sensitivity of multi-parameter measurement.
We propose a dual-channel surface plasmon resonance (SPR) sensor based on hollow-core fiber (HCF) for the simultaneous measurement of the liquid refractive index (RI) and ambient temperature. The simultaneous monitoring of two parameters can effectively realize the temperature compensation of liquid RI measurement. One channel is coated with a silver film to sense the liquid RI, the other channel is coated with a gold film and polydimethylsiloxane (PDMS) to sense the ambient temperature, and the cross sensitivity of the multi-parameter measurement is solved using the dual-wavelength matrix method. The sensing performance of the proposed sensor is investigated both theoretically and experimentally, which proves that it can achieve high sensitivity in a relatively wide measurement range. The experiment shows that the liquid RI sensitivity is as high as 2400.079 nm/RIU in the RI range of 1.3333-1.3770, and the temperature sensitivity is -1.29 nm/degrees C in the temperature range of 40 degrees C-90 degrees C. This work provides a new scheme for the multi-parameter measurement, and the proposed sensor has the advantages of simple and compact structure, low cost, wide measurement range and high sensitivity, which promises broad application prospects in the simultaneous monitoring of liquid RI and temperature.
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