Abstract

This work explores the development of highly sensitive salinity sensors. The demonstrated sensors are based on optical fibres and consist on Fabry-Pérot optical cavities formed by optimized processes that include chemical etching and fusion splicing, on which microfluidic channels are milled by focused ion beam. Two configurations are presented and their performance compared, including a design that makes use of Vernier-effect for the simultaneous measurement of salinity and temperature with high sensitivity. The interrogation of the devices is carried out by spectral measurements using a broadband light source yielding sensitivities to salinity up to 82.61 nm/M, or 6830.0 nm/RIU.

Details

Title
Optical fibre Fabry-Pérot interferometer based on inline microcavities for salinity and temperature sensing
Author
Flores, Raquel 1   VIAFID ORCID Logo  ; Janeiro Ricardo 1 ; Viegas, Jaime 1 

1  Khalifa University of Science and Technology, Masdar City Campus, Department of Electrical and Computer Engineering, Abu Dhabi, United Arab Emirates (GRID:grid.440568.b) (ISNI:0000 0004 1762 9729) 
Publication year
2019
Publication date
2019
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41598-019-45909-2
ProQuest document ID
2251071924
Copyright
© The Author(s) 2019. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.