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Journal of Nanophotonics

Relative humidity sensor based on surface plasmon resonance of D-shaped fiber with polyvinyl alcohol embedding Au grating
Author(s): Haitao Yan; Daofu Han; Ming Li; Bo Lin
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Paper 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.

Paper Details

Date Published: 11 February 2017
PDF: 7 pages
J. Nanophoton. 11(1) 016008 doi: 10.1117/1.JNP.11.016008
Published in: Journal of Nanophotonics Volume 11, Issue 1
Show Author Affiliations
Haitao Yan, Henan Univ. of Science and Technology (China)
Daofu Han, Nanchang Univ. (China)
Ming Li, Institute of Semiconductors, Chinese Academy of Sciences (China)
Puyang Institute of Opto-Electronics Industrial Technology (China)
Bo Lin, The China Academy of Electronics & Information Technology (China)

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