https://doi.org/10.1051/epjconf/202328709040
Optical Fiber Flowmeter Based on a Michelson Interferometer
1 INESC TEC – Institute for Systems and Computer Engineering, Technology and Science, Porto, Portugal
2 Department of Engineering Physics, Faculty of Engineering of the University of Porto, Porto, Portugal
3 IMS/CIQUP - Institute of Molecular Sciences/Chemistry Research Unit, Faculty of Sciences of the University of Porto, Porto, Portugal
* Corresponding author: catarina.s.monteiro@inesctec.pt
Published online: 18 October 2023
In this work, an optical fiber flowmeter based on a Michelson interferometer is presented. The Michelson interferometer uses a long period fiber grating (LPFG) to couple light to the cladding modes followed by a section of a GO-coated single mode fiber (SMF). By radiating the GO thin film, it will increase its temperature changing the effective refractive index of the optical cavity of the Michelson interferometer. By placing the sensor on a gas flow, its temperature surface will decrease in a proportional manner to the flow rate. The sensor was studied in both static and dynamic dry nitrogen flow, attaining an absolute sensitivity of 17.4 ± 0.8 pm/(L.min-1) and a maximum response time of 1.1 ± 0.4 s.
© The Authors, published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
