Title

Fiber-Optic Sensor For Liquid Level Measurement

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. © 2011 Optical Society of America.

Publication Date

9-1-2011

Publication Title

Optics Letters

Volume

36

Issue

17

Number of Pages

3425-3427

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/OL.36.003425

Socpus ID

80052428725 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/80052428725

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