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Biosensors 2017, 7(2), 23; doi:10.3390/bios7020023

Towards a Uniform Metrological Assessment of Grating-Based Optical Fiber Sensors: From Refractometers to Biosensors

1
Institute of Applied Physics “Nello Carrara”, IFAC-CNR, Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
2
Institute for Systems and Computer Engineering, Technology and Science, INESC-TEC, Rua do Campo Alegre 687, Porto 4169-007, Portugal
3
Institute INESC P&D Brasil, Rua José Caballero, 15, Gonzaga, 11055-300 Santos, Brazil
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 13 May 2017 / Revised: 10 June 2017 / Accepted: 20 June 2017 / Published: 21 June 2017
(This article belongs to the Special Issue Biophotonic Sensors and Applications)
View Full-Text   |   Download PDF [3665 KB, uploaded 21 June 2017]   |  

Abstract

A metrological assessment of grating-based optical fiber sensors is proposed with the aim of providing an objective evaluation of the performance of this sensor category. Attention was focused on the most common parameters, used to describe the performance of both optical refractometers and biosensors, which encompassed sensitivity, with a distinction between volume or bulk sensitivity and surface sensitivity, resolution, response time, limit of detection, specificity (or selectivity), reusability (or regenerability) and some other parameters of generic interest, such as measurement uncertainty, accuracy, precision, stability, drift, repeatability and reproducibility. Clearly, the concepts discussed here can also be applied to any resonance-based sensor, thus providing the basis for an easier and direct performance comparison of a great number of sensors published in the literature up to now. In addition, common mistakes present in the literature made for the evaluation of sensor performance are highlighted, and lastly a uniform performance assessment is discussed and provided. Finally, some design strategies will be proposed to develop a grating-based optical fiber sensing scheme with improved performance. View Full-Text
Keywords: optical fiber grating; fiber Bragg grating; long period grating; resonance-based device; refractive index sensor; biosensor; sensitivity; resolution; limit of detection; specificity optical fiber grating; fiber Bragg grating; long period grating; resonance-based device; refractive index sensor; biosensor; sensitivity; resolution; limit of detection; specificity
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Chiavaioli, F.; Gouveia, C.A.J.; Jorge, P.A.S.; Baldini, F. Towards a Uniform Metrological Assessment of Grating-Based Optical Fiber Sensors: From Refractometers to Biosensors. Biosensors 2017, 7, 23.

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