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Proceedings Paper

A low cost relative humidity sensor fabricated by coating optical fused fiber coupler with sol-gel material
Author(s): Fufei Pang; Ping Xu; Min Wang; Xianglong Zeng; Zhenyi Chen; Tingyun Wang
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Paper Abstract

A novel optical fiber relative humidity(RH) sensor was proposed in this paper based on fiber evanescent wave coupling. Sol-gel material with porous microstructure as water molecules sensitivity film was dip-coated upon coupling region surface. Visibility calculated from output optical powers of the coupler sensor was taken to show the sensitivity to relative humility. From the experimental results, with increasing relative humidity ranged from 25% to 95%, the visibility decreased in a good linear manner. And the sensitivity was approximate 0.132/RH%. Due to simple technique and low lost of the fiber coupler relative humidity sensor, it will be applied widely.

Paper Details

Date Published: 26 November 2007
PDF: 4 pages
Proc. SPIE 6830, Advanced Sensor Systems and Applications III, 68300M (26 November 2007); doi: 10.1117/12.756912
Show Author Affiliations
Fufei Pang, Shanghai Univ. (China)
Ping Xu, Shanghai Univ. (China)
Min Wang, Shanghai Univ. (China)
Xianglong Zeng, Shanghai Univ. (China)
Zhenyi Chen, Shanghai Univ. (China)
Tingyun Wang, Shanghai Univ. (China)


Published in SPIE Proceedings Vol. 6830:
Advanced Sensor Systems and Applications III
Yun-Jiang Rao; Yanbiao Liao; Gang-Ding Peng, Editor(s)

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