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Proceedings Paper

Polymer-coated hybrid fiber grating for relative humidity sensing
Author(s): Tao Li; Xinyong Dong; Chun-Liu Zhao; Yang Liu
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Paper Abstract

A relative humidity (RH) sensor based on a hybrid fiber grating coated with a moisture sensitive polymer is proposed in this paper. The hybrid fiber grating includes a normal fiber Bragg grating (FBG) and a tilted FBG (TFBG), which are superimposed around the same position of the fiber. The FBG reflects a part of the cladding modes of the TFBG and its intensity changes with the refractive index of the moisture sensitive polymer, which varies when absorbing and desorbing moisture. The optical power interrogation method is simper and more cost-efficient than normal FBG-based relative humidity sensors using wavelength detection method.

Paper Details

Date Published: 9 November 2010
PDF: 6 pages
Proc. SPIE 7853, Advanced Sensor Systems and Applications IV, 78532V (9 November 2010); doi: 10.1117/12.870237
Show Author Affiliations
Tao Li, China Jiliang Univ. (China)
Xinyong Dong, China Jiliang Univ. (China)
Chun-Liu Zhao, China Jiliang Univ. (China)
Yang Liu, China Jiliang Univ. (China)


Published in SPIE Proceedings Vol. 7853:
Advanced Sensor Systems and Applications IV
Brian Culshaw; Yanbiao Liao; Anbo Wang; Xiaoyi Bao; Xudong Fan; Lin Zhang, Editor(s)

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