期刊
PHOTONICS
卷 8, 期 6, 页码 -出版社
MDPI
DOI: 10.3390/photonics8060231
关键词
surface plasmon resonance (SPR); temperature sensor; conjoined-tubular anti-resonance fiber (CTF)
类别
资金
- National Key Research and Development Program of China [2017YFA0701200]
- National Natural Science Foundation of China [61775032]
- Fundamental Research Funds for the Central Universities [N2104022, N180704006, N2004021, N180408018]
- Natural Science Foundation of Science and Technology Department of Liaoning Province [2020-BS-046]
- Hebei Natural Science Foundation [F2020501040]
- 111 Project [B16009]
In this study, a surface plasmon resonance (SPR) temperature sensor based on a con-joined-tubular anti-resonance optical fiber (CTF) was theoretically designed and analyzed, showing great potential in practical applications such as biological research and chemical sensing due to its high sensitivity, good birefringence, multiple measuring wavebands, and self-verification capabilities.
In this work, a surface plasmon resonance (SPR) temperature sensor based on a con-joined-tubular anti-resonance optical fiber (CTF) was theoretically designed and analyzed using the finite element method. The CTF cladding was composed of eight pairs of conjoined tubes, and one or two holes of the tubes were selectively coated with gold to generate the SPR effect. Alcohol was injected into the core of the CTF to work as the sensing medium using vapor deposition. The proposed sensing structure exhibited excellent birefringence and produced more than six resonant peaks in different wavebands of the X and Y polarization. The positions of those resonant peaks were sensitive to temperature change, and the simulated sensitivity was about 3.2-3.6 nm/degrees C. The multiple working wavebands of the proposed sensing structure could be used for self-verification. Moreover, the influence of structural parameters on sensing performance was analyzed in detail. Possessing features of high sensitivity, good birefringence, multiple measuring wavebands, and self-verification, the proposed CTF-based SPR sensor has great potential in practical applications such as biological research and chemical sensing.
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