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Proceedings Paper

Novel multimode interference liquid level sensors
Author(s): J. E. Antonio-Lopez; M. Torres-Cisneros; J. A. Arredondo-Lucio; J. J. Sanchez-Mondragon; P. Likamwa; D. A. May-Arrioja
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Paper Abstract

A novel all-fiber Multimode Interference (MMI) liquid level sensor is proposed and demonstrated. We show that MMI effects can be effectively applied for multiplexed liquid level sensing, and by selecting an adequate fiber, discrete and continuous level sensing is feasible. Using a standard 105/125 multimode fiber a simple discrete level sensor was fabricated, which can also can also discriminate the refractive index of the liquid. When a specialty fiber, know as No- Core fiber is used, both continuous and discrete level sensing can be achieved. We can also modify at will the continuous level range by increasing the No-core fiber by the appropriate length, while retaining the ability to determine the refractive index of the liquid during the level measurement. The MMI liquid level sensors are not only inexpensive, but their fabrication is quite simple.

Paper Details

Date Published: 14 October 2010
PDF: 4 pages
Proc. SPIE 7839, 2nd Workshop on Specialty Optical Fibers and Their Applications (WSOF-2), 78391V (14 October 2010); doi: 10.1117/12.868256
Show Author Affiliations
J. E. Antonio-Lopez, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
M. Torres-Cisneros, Univ. de Guanajuato (Mexico)
CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
J. A. Arredondo-Lucio, Univ. Autónoma de Tamaulipas (Mexico)
J. J. Sanchez-Mondragon, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
P. Likamwa, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
D. A. May-Arrioja, Univ. Autónoma de Tamaulipas (Mexico)


Published in SPIE Proceedings Vol. 7839:
2nd Workshop on Specialty Optical Fibers and Their Applications (WSOF-2)
Juan Hernández-Cordero; Ismael Torres-Gómez; Alexis Méndez, Editor(s)

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