Title

Fiber-Optic Liquid Level Sensor

Keywords

Liquid-level sensor; multimode interference (MMI); optical fiber sensors

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. © 2011 IEEE.

Publication Date

11-23-2011

Publication Title

IEEE Photonics Technology Letters

Volume

23

Issue

23

Number of Pages

1826-1828

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/LPT.2011.2170058

Socpus ID

81455132761 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/81455132761

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