Optical fiber flowmeter based on graphene oxide coated michelson interferometer

• Type: Article in International Scientific Journal
• Date: 2023

Authors

Monteiro, CS (Author) Other; Ferreira, M (Author) Other; Mendes, JP (Author) Other; Coelho, LCC (Author) FCUP; Susana Silva (Author) FCUP; Frazao, O (Author) FCUP

Journal

Title: Sensors and Actuators, A: Physical

Vol. 363

ISSN: 0924-4247

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 0 Citations

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Other information

Authenticus ID: P-00Z-A8V

DOI: 10.1016/j.sna.2023.114775

Abstract (EN): Measuring gas and liquid flow rate is paramount in various scientific and industrial applications. This work presents an optical fiber flowmeter based on a graphene oxide (GO) coated Michelson interferometer. The interferometer is fabricated using a long-period fiber grating (LPFG) followed by a GO-coated single-mode fiber (SMF). By radiating the GO coating, it experiences photothermic effect that induces local heating of the film. This results in a variation in the effective refractive index in the cladding modes, which induces a phase shift on the interferometer spectrum. When a gas flow is introduced near the coated fiber, the hot-wire region will experience a reduction in temperature proportional to the flow rate. The flowmeter exhibited a linear wavelength shift to the flow rate with an absolute sensitivity of 17.4 +/- 0.8 pm/(L.min-1) for gas flow rates between 2 and 8 L/ min. Furthermore, the dynamic response of the sensor was studied, attaining a maximum response time of 1.1 +/- 0.4 s

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6