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Proceedings Paper

Double-fiber Fabry-Perot Interferometry optical fiber liquid level sensor
Author(s): Bin Tong; Min Li; Yulin Li
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Paper Abstract

This paper presents a liquid level sensor with a double-fiber Fabry-Perot (F-P) cavity and a diaphragm serving as the sensing element. The end surfaces of the two fibers that integrated in a ferrule serve as the front surfaces of the F-P cavities, and the diaphragm (one of the standard components of a manometer) as the rear surface. The random difference in position between the two fiber ends makes a phase difference between the two F-P interferometers, and is used to interpret the direction of the pattern shifts with the variation of the F-P cavity length, which leads to a much lower technological requirement for the cavity manufacture and a more stable sensor. A prototype is fabricated to demonstrate the design, and the experimental results show a system accuracy of 1/2 fringe, refer to a height-resolution of 1mm.

Paper Details

Date Published: 30 January 2012
PDF: 6 pages
Proc. SPIE 8351, Third Asia Pacific Optical Sensors Conference, 83510T (30 January 2012); doi: 10.1117/12.915918
Show Author Affiliations
Bin Tong, Wuhan Univ. of Technology (China)
Min Li, Wuhan Univ. of Technology (China)
Yulin Li, Wuhan Haomai Photonics Technology Co., Ltd. (China)

Published in SPIE Proceedings Vol. 8351:
Third Asia Pacific Optical Sensors Conference
John Canning; Gangding Peng, Editor(s)

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