Optical fibre gratings as tools for chemical and biochemical sensing |
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Authors: | Email author" target="_blank">F?BaldiniEmail author M?Brenci F?Chiavaioli A?Giannetti C?Trono |
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Affiliation: | (1) IFAC-CNR, Via Madonna del Piano 10, 50019 Sesto Fiorentino, FI, Italy;(2) Department Information Engineering, University of Siena, Via Roma 56, 53100 Siena, Italy |
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Abstract: | Optical fibre gratings have recently been suggested as optical platforms for chemical and biochemical sensing. On the basis
of the measurement of refractive index changes induced by a chemical and biochemical interaction in the transmission spectrum
along the fibres, they are proposed as a possible alternative to the other label-free optical approaches, such as surface
plasmon resonance and optical resonators. The combination of the use of optical fibres with the fact that the signal modulation
is spectrally encoded offers multiplexing and remote measurement capabilities which the other technology platforms are not
able to or can hardly offer. The fundamentals of the different types of optical fibre gratings are described and the performances
of the chemical and biochemical sensors based on this approach are reviewed. Advantages and limitations of optical fibre gratings
are considered, with a look at new perspectives for their utilization in the field. |
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