Fiber-Optic Liquid Level Sensor

    Authors

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

    Comments

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    Abbreviated Journal Title

    IEEE Photonics Technol. Lett.

    Keywords

    Liquid-level sensor; multimode interference (MMI); optical fiber sensors; Engineering, Electrical & Electronic; Optics; Physics, Applied

    Abstract

    A fiber-optic liquid level sensor based on multimode interference (MMI) effects is proposed and demonstrated. We show that MMI and self-image effects can be effectively applied for multiplexed liquid level sensing, because the natural response as a band-pass filter for each sensor is clearly distinct from each other, in the case for several sensors working at the same time. Using a standard 105/125 step-index multimode fiber (MMF) a simple discrete level sensor was fabricated, that can also discriminate the refractive index (RI) of the liquid during the level measurement. The MMI liquid level sensors are not only inexpensive, but their fabrication is simple.

    Journal Title

    Ieee Photonics Technology Letters

    Volume

    23

    Issue/Number

    23

    Publication Date

    1-1-2011

    Document Type

    Article

    Language

    English

    First Page

    1826

    Last Page

    1828

    WOS Identifier

    WOS:000297095200003

    ISSN

    1041-1135

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