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Abstract
In this paper, we present a fibre-optic sensor for simultaneous measurement of refractive index and thickness of liquid layers. We designed an experimental low-coherence setup with two broadband light sources and an extrinsic fibre-optic Fabry–Pérot interferometer acting as the sensing head. We examined how the refractive index of a liquid film and its thickness affect spectrum at the output of a fibre-optic interferometer. We performed a series of experiments using two light sources and only one sensing head. The spectra were collected in ranges of 1220÷1340 nm and 1500÷1640 nm. The obtained results show that using two spectra recorded simultaneously for two wavelength ranges enables to determine thickness in a range of 50÷500 µm, and refractive index of a liquid film in a range of 1:00÷1:41 RIU using only one sensing head.
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Full text
- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.24425/mms.2019.129584
- License
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
Metrology and Measurement Systems
no. 26,
pages 561 - 568,
ISSN: 0860-8229 - Language:
- English
- Publication year:
- 2019
- DOI:
- Digital Object Identifier (open in new tab) 10.24425/mms.2019.129584
- Sources of funding:
-
- Project DIAMSEC - ultrasensitive sensing platform for rapid detection of epidemiological and pandemic threats
- Statutory activity/subsidy
- Verified by:
- Gdańsk University of Technology
Referenced datasets
- dataset Distance measurement with the low coherent interferometer with silver mirror (the source wavelegth 1310 nm) - 0 um (serie 2)
- dataset Distance measurement with the low coherent interferometer with silver mirror (the source wavelegth 1310 nm) - 40 um (serie 2)
- dataset Distance measurement with the low coherent interferometer with silver mirror (the source wavelegth 1310 nm) - 30 um (serie 2)
- dataset Distance measurement with the low coherent interferometer with silver mirror (the source wavelegth 1310 nm) - 200 um (serie 2)
- dataset Distance measurement with the low coherent interferometer with silver mirror (the source wavelegth 1310 nm) - 20 um (serie 1)
- dataset Distance measurement with the low coherent interferometer with silver mirror (the source wavelegth 1310 nm) - 80 um (serie 1)
- dataset Distance measurement with the low coherent interferometer with silver mirror (the source wavelegth 1310 nm) - 170 um (serie 1)
- dataset Distance measurement with the low coherent interferometer with silver mirror (the source wavelegth 1310 nm) - 20 um (serie 2)
- dataset Distance measurement with the low coherent interferometer with silver mirror (the source wavelegth 1310 nm) - 140 um (serie 1)
- dataset Distance measurement with the low coherent interferometer with silver mirror (the source wavelegth 1310 nm) - 130 um (serie 2)
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