1Henan Univ. of Science and Technology (China) 2Nanchang Univ. (China) 3Institute of Semiconductors, Chinese Academy of Sciences (China) 4Puyang Institute of Opto-Electronics Industrial Technology (China) 5The China Academy of Electronics & Information Technology (China)
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This paper presents the design, fabrication, and characterization of a D-shaped fiber coated with polyvinyl alcohol (PVA) embedding an Au grating-based relative humidity (RH) sensor. The Au grating is fabricated on a D-shaped fiber to match the wave-vector and excite the surface plasmon, and the PVA is embedded in the Au grating as a sensitive cladding film. The refractive index of PVA changes with the ambient humidity. Measurements in a controlled environment show that the RH sensor can achieve a sensitivity of 5.4 nm per relative humidity unit in the RH range from 0% to 70% RH. Moreover, the surface plasmon resonance can be realized and used for RH sensing at the C band of optical fiber communication instead of the visible light band due to the metallic grating microstructure on the D-shaped fiber.
Haitao Yan,Daofu Han,Ming Li, andBo Lin
"Relative humidity sensor based on surface plasmon resonance of D-shaped fiber with polyvinyl alcohol embedding Au grating," Journal of Nanophotonics 11(1), 016008 (11 February 2017). https://doi.org/10.1117/1.JNP.11.016008
Received: 10 September 2016; Accepted: 24 January 2017; Published: 11 February 2017
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Haitao Yan, Daofu Han, Ming Li, Bo Lin, "Relative humidity sensor based on surface plasmon resonance of D-shaped fiber with polyvinyl alcohol embedding Au grating," J. Nanophoton. 11(1) 016008 (11 February 2017) https://doi.org/10.1117/1.JNP.11.016008