A compact surface plasmon resonance(SPR) fiber optic sensor, being utilized to simultaneously measure refractive index(RI) and temperature, is proposed and experimentally demonstrated in this paper. One part of a no-c...A compact surface plasmon resonance(SPR) fiber optic sensor, being utilized to simultaneously measure refractive index(RI) and temperature, is proposed and experimentally demonstrated in this paper. One part of a no-core fiber(NCF)was coated with a silver(Ag) film, and the other part was coated with a silver/polydimethylsiloxane(Ag/PDMS) composite film to stimulate the SPR effect. Due to the two heterogeneous films, two dips appeared in the transmission spectrum and were used to achieve the dual-parameter measurements. The experimental results showed that the RI sensitivity reached 2121.43 nm/RIU and 0 nm/RIU, while the temperature sensitivity reached-0.32 nm/℃ and-2.21 nm/℃ for the two dips,respectively. Based on the obtained transfer matrix, the measurements of RI and temperature could be demodulated. This designed sensor showed the merits of simple structure, easy to implement, and high sensitivity, demonstrating application prospects in dual-parameter monitoring.展开更多
基金the Natural Science Foundation of Hebei Province, China (Grant No. F2021203112)the National Natural Science Foundation of China (Grant No. 12074331)+1 种基金the National Key Research and Development Program of China (Grant No. 2019YFB2204001)Basic Scientific Research Funds for universities in Hebei Province, China (Grant No. JQN2021019)。
文摘A compact surface plasmon resonance(SPR) fiber optic sensor, being utilized to simultaneously measure refractive index(RI) and temperature, is proposed and experimentally demonstrated in this paper. One part of a no-core fiber(NCF)was coated with a silver(Ag) film, and the other part was coated with a silver/polydimethylsiloxane(Ag/PDMS) composite film to stimulate the SPR effect. Due to the two heterogeneous films, two dips appeared in the transmission spectrum and were used to achieve the dual-parameter measurements. The experimental results showed that the RI sensitivity reached 2121.43 nm/RIU and 0 nm/RIU, while the temperature sensitivity reached-0.32 nm/℃ and-2.21 nm/℃ for the two dips,respectively. Based on the obtained transfer matrix, the measurements of RI and temperature could be demodulated. This designed sensor showed the merits of simple structure, easy to implement, and high sensitivity, demonstrating application prospects in dual-parameter monitoring.
