Single uniform FBG for simultaneous measurement of liquid level and temperature

Abstract

In this paper, we propose and demonstrate a novel scheme for simultaneous measurement of liquid level and temperature based on a simple uniform fiber Bragg grating (FBG) by monitoring both the short-wavelength-loss peaks and its Bragg resonance. The liquid level can be measured from the amplitude changes of the short-wavelength-loss peaks, while temperature can be measured from the wavelength shift of the Bragg resonance. Both theoretical simulation results and experimental results are presented. Such a scheme has some advantages including robustness, simplicity, flexibility in choosing sensitivity and simultaneous temperature measurement capability.

Divisions: Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences
Uncontrolled Keywords: fiber optics sensors, fiber Bragg gratings, liquid-level sensor
Published Date: 2010-07-28
Authors: Shu, Xuewen
Sugden, Kate
Bennion, Ian

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