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Optical Engineering

Simultaneous measurement of trace organic vapors and temperature by use of zeolite thin film-coated fiber spherical end face and fiber Bragg grating
Author(s): Chunliu Zhao; Binqing Wu; Feifei Shi; Juan Kang; Dongning Wang
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Paper Abstract

An optical fiber spherical end face coated with zeolite thin film is used together with a fiber Bragg grating (FBG) for simultaneous measurement of trace organic vapor and temperature. The fiber spherical end face is fabricated by using electrical arc discharge on single mode fiber and then coated with zeolite thin film. The FBG is placed in front of the zeolite film-coated fiber spherical end head. The coated fiber spherical end essentially forms an intrinsic Fabry–Perot (F–P) cavity. The trace chemical vapor concentration is measured by monitoring the interference wavelength shift of the coated optical fiber spherical F–P sensor head, due to the zeolite film adsorption to organic vapor molecules. Meanwhile, temperature is measured by monitoring the Bragg wavelength shift of the FBG. The experimental results show that the proposed trace organic vapor sensor exhibits a high sensitivity, which is 1.199    nm / ppm for isopropanol within the range from 0 to 20 ppm, and the temperature sensitivity is 10.2    pm / ° C within the range from 30°C to 70°C. Such a sensor has high sensitivity, excellent repeatability, fast response, and real-time monitoring capability.

Paper Details

Date Published: 30 March 2017
PDF: 5 pages
Opt. Eng. 56(3) 036117 doi: 10.1117/1.OE.56.3.036117
Published in: Optical Engineering Volume 56, Issue 3
Show Author Affiliations
Chunliu Zhao, China Jiliang Univ. (China)
Binqing Wu, China Jiliang Univ. (China)
Feifei Shi, China Jiliang Univ. (China)
Juan Kang, China Jiliang Univ. (China)
Dongning Wang, China Jiliang Univ. (China)

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