Hot-Wire Anemometer Based on D-Shaped Optical Fiber

This article proposes a hot-wire anemometer based on optical fiber embedding a fiber Bragg grating (FBG) and having a D-shaped transversal Section on whose flat surface a thin metallic layer has been deposited. Due to this geometrical structure, the optical power flowing through the fiber core can a...

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Bibliographic Details
Published in:IEEE sensors journal 2023-06, Vol.23 (12), p.12845-12852
Main Authors: De Vita, Elena, Di Palma, Pasquale, Zahra, Sidrish, Roviello, Giuseppina, Ferone, Claudio, Iadicicco, Agostino, Campopiano, Stefania
Format: Article
Language:English
Subjects:
Anemometers
Bragg gratings
D-fiber
Design parameters
Embedding
fiber Bragg gratings (FBGs)
fiber-optic anemometer
Flat surfaces
Fluid flow measurement
Gold
Heating systems
hot-wire anemometer (HWA)
Optical fiber sensors
Optical fibers
Power management
Sensors
Temperature sensors
thermoplasmonic effect
Thickness
Wire
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Summary:This article proposes a hot-wire anemometer based on optical fiber embedding a fiber Bragg grating (FBG) and having a D-shaped transversal Section on whose flat surface a thin metallic layer has been deposited. Due to this geometrical structure, the optical power flowing through the fiber core can achieve the metallic layer and can be converted into heat. The embedded FBG can measure the resulting temperature increase and the temperature fluctuation of the D-fiber caused by the wind flowing. Numerical simulations have been performed in order to select the appropriate design parameters, such as thickness of the metallic layer and its distance from the core. Then, the fabrication process of the device and the experimental results of its characterization in temperature and wind assess its working principle. The developed sensor can work at low power levels of the source and is characterized by small size and high accuracy. Furthermore, it shows high cost-effectiveness and the possibility to modulate its wind sensitivity by setting the source power.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2023.3269661