Research Papers

Relative humidity sensor based on surface plasmon resonance of D-shaped fiber with polyvinyl alcohol embedding Au grating

[+] Author Affiliations
Haitao Yan

Henan University of Science and Technology, The College of Physics Engineering, Luoyang, China

Daofu Han

Nanchang University, The College of Science, Nanchang, China

Ming Li

Chinese Academy of Sciences, The Institute of Semiconductors, Beijing, China

The Puyang Photoelectric Industry Technology Institute, Pu Yang, China

Bo Lin

The China Academy of Electronics and Information Technology, Beijing, China

J. Nanophoton. 11(1), 016008 (Feb 11, 2017). doi:10.1117/1.JNP.11.016008
History: Received September 10, 2016; Accepted January 24, 2017
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Abstract.  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.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Haitao Yan ; Daofu Han ; Ming Li and 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 (Feb 11, 2017). ; http://dx.doi.org/10.1117/1.JNP.11.016008


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