Fiber-optic sensor for liquid level measurement

    Authors

    J. E. Antonio-Lopez; J. J. Sanchez-Mondragon; P. LiKamWa;D. A. May-Arrioja

    Comments

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    Abbreviated Journal Title

    Opt. Lett.

    Keywords

    GAUGE; Optics

    Abstract

    A novel (to the best of our knowledge) liquid level sensor based on multimode interference (MMI) effects is proposed and demonstrated. By using a multimode fiber (MMF) without cladding, known as no-core fiber, liquids around the MMF modify the self-imaging properties of the MMI device and the liquid level can be detected. We show that the sensor exhibits a highly linear response with the sensing range and multiplexed operations easily controlled by just modifying the length of the no-core fiber. At the same time, we can measure the refractive index of the liquid based on the maximum peak wavelength shift. We can also use the sensor for continuous and discrete liquid level sensing applications, thus providing a liquid level sensor that is inexpensive with a very simple fabrication process. (C) 2011 Optical Society of America

    Journal Title

    Optics Letters

    Volume

    36

    Issue/Number

    17

    Publication Date

    1-1-2011

    Document Type

    Article

    Language

    English

    First Page

    3425

    Last Page

    3427

    WOS Identifier

    WOS:000294667100041

    ISSN

    0146-9592

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