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Fiber-Optic Displacement Sensor Based On Fabry-Pérot Interferometer

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eeict2018-378.pdf (692.1Kb)
Date
2018
Author
Skalský, Michal
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Abstract
This paper describes a simple and inexpensive fiber-optic sensor for dynamic displacement measurement with sub-nanometer resolution. The principle is based on creating a resonator cavity between measured surface and a single-mode fiber, working as a Fabry-Pérot interferometer. The fundamental principles like diffraction, spatial filtration or the role of reflectivity are analyzed theoretically and their effect on the sensitivity is explained. The sensor is then tested experimentally with an uncoated fiber tip and a gold mirror. Based on the spectral analysis, the effect of working distance on interference visibility is explained.
Keywords
Fiber-optic sensors, Fabry-Pérot interferometer, interferometric measurement, vibration sensing, acoustic emission
Persistent identifier
http://hdl.handle.net/11012/138260
Document type
Peer reviewed
Document version
xmlui.vut.verze.Publishers's version
Source
Proceedings of the 24th Conference STUDENT EEICT 2018. s. 372-382. ISBN 978-80-214-5614-3
http://www.feec.vutbr.cz/EEICT/
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  • Student EEICT 2018 [157]
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