Title :
All-Fiber Mach–Zehnder Interferometer for Liquid Level Measurement
Author :
MingMing Sun ; Yongxing Jin ; Xinyong Dong
Author_Institution :
Inst. of Optoelectron. Technol., China Jiliang Univ., Hangzhou, China
Abstract :
A new liquid level sensor based on in fiber Mach-Zehnder interferometer (MZI) is proposed and demonstrated. The MZI is formed by cascading two peanut-shaped fiber structures in single-mode fiber. In the water level experiment, the sensitivities of sensors with lengths of 53.5 and 75.4 mm are -0.1025 and -0.0279 nm/mm, respectively. The absolute value of sensitivity increases with the refractive index of liquid. The MZI presented in this paper has advantages of low cost and ease of fabrication, which can be a potential advantage in the liquid level measurement.
Keywords :
Mach-Zehnder interferometers; fibre optic sensors; level measurement; optical fibre fabrication; refractive index measurement; MZI; all-fiber Mach-Zehnder interferometer; distance 53.5 mm; distance 75.4 mm; liquid level measurement; liquid level sensor; optical fabrication; peanut-shaped fiber structure; refractive index; single-mode fiber; water level experiment; Liquids; Optical fiber sensors; Optical fibers; Optical interferometry; Sensitivity; Temperature sensors; Mach–Zehnder Interferometer; Mach???Zehnder interferometer; liquid level sensor; peanut shape structure;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2015.2406872
