Combined fibre-optic sensor for colour and refractive index (CI) monitoring

Trudeau, Jean-Marie; Paradis, Paul‐François; Paré, Claude; Meneghini, C.; Cournoyer, Alain; Savard, Éric; Doyon, G.; Jacob-Poulin, A.-C.; Fougères, André

doi:10.1088/0957-0233/17/5/s33

Cited by 5 publications

(3 citation statements)

References 10 publications

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“…8,9 This sensing technology had already been used in the winemaking industry. For example, Garcia et al 10 developed a sensor to determine the turbidity during the winemaking process and the simultaneous monitoring of colour and refractive index was studied by Trudeau et al 11 using a V-shaped refractive index and an airgap sensor. However, this solution involves micro-machined structures, which increase the fabrication cost.…”

Section: Introductionmentioning

confidence: 99%

Plastic optical fibre sensor for Madeira wine monitoring

et al. 2014

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Madeira wine is a fortified wine produced in Madeira Island, Portugal. Its characteristics are strongly influenced by the winemaking method used which includes a typical and unique step called estufagem. This process consists on heating the wine up to 55 ºC for at least 3 months. In this paper, the characterization of the sensor for the pilot scale facility of estufagem installed in Madeira University is presented, being the device an optimization of a previous version. The response of the sensor was tested towards colour and refractive index, showing a good performance. Madeira wine with different estufagem times was also analysed.

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Section: Introductionmentioning

confidence: 99%

Plastic optical fibre sensor for Madeira wine monitoring

et al. 2014

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“…Recently, a multi-parameter fiber-optical sensor was developed for the simultaneous monitoring of color and the refractive index of the red wine [8]. A portable spectronephelometer for port wine has been developed for in situ monitoring of the success of the filtration process by measuring the color and turbidity of the wine [9].…”

Section: Introductionmentioning

confidence: 99%

Multifunction spectrometer for optical inspection of red wine

Niskanen

Mutanen

Lehtonen

et al. 2008

Sens. & Instrumen. Food Qual.

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The main goal of this study was to develop an apparatus that makes it possible to measure both, color, refractive index and light scattering (turbidity) of red wines using a single device only. Typically such measurement of red wine quality requires three different measurement devices. As an example of the efficiency of the present device we studied the change of the thermo-optical and time-dependent optical properties of red wine samples. Here we report on change of optical properties of two Merlot wine samples, which were obtained by opening authentic red wine bottles and preserving a set of samples both at room and refrigerator temperature for 26 days, respectively. The interesting feature with both red wine samples was that the light scattering, i.e. the turbidity of the samples, increased as a function of time due to oxidation process. It is suggested that the multifunction spectrophotometer can be applied for optical inspection of red and other wine products.

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“…In this method, the resolution depends on the resolution to which the optical power transmission can be measured. Such sensors have been demonstrated in a bent plastic multimode optical fibre with a partially stripped cladding 15 , in cladded multimode tapered fibre tips with mirrored ends based on the radiation of the modes guided by the cladding 16 , in an evanescent wave-based sensor created using a tapered single-mode fibre embedded in a polymer 17 , in the leakage of a side-polished single-mode fibre 18 , in side-polished plastic optical fibres 19,20 , in a microstructured fibre Bragg grating in a single-mode fibre 21 (the wavelength of the optical source had to be tuned to be close to the Bragg wavelength), in the fibre core diameter mismatches when a small section of a singlemode fibre was sandwiched between two lead multimode fibres 2 , in V-shaped unclad multimode fibres with varying angles 22 , in a tapered section of multimode fibre sandwiched between two single-mode fibres having two different FBGs 23 . The ranges of operation and the peak resolution reported for the sensors described above are given in Table 2.…”

Section: Introductionmentioning

confidence: 99%

Refractive index sensor based on etched D-fibres with wavelength adjustable operating point and resolution

Chandani

Jaeger

2008

SPIE Proceedings

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Silica based fibre-optic refractive index sensors are gaining acceptance over conventional refractometers and finding applications in chemical/biological sensing due to many of their desirable properties. Here we present an optical fibrebased refractive index sensor that uses the power transmission through etched D-shaped fibres. The sensor's operating point and resolution can be tailored for a specific application by selecting the correct combination of the operating wavelength and the cladding thickness of the etched fibre. The sensor's power transmission depends on the surrounding refractive index in which the sensor head is immersed. The sensor presented has a maximum resolution on the order of 10 -6 in its "high resolution" region and on the order of 10 -4 in its "low resolution" region. The refractive index at which the maximum resolution occurs in the high resolution region can be shifted by ~0.012 and by ~0.027 in the low resolution region. To date, such high resolutions have been reported over narrow ranges and/or for fibre Bragg grating based sensors, which require optical spectral analysis which typically, is costly.

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Combined fibre-optic sensor for colour and refractive index (CI) monitoring

Abstract: Two fibre-optic probes are combined for the simultaneous monitoring of colour and refractive index of liquids, including highly coloured ones. It is shown how, through modelling, the design can be adapted to cover different ranges of refractive index, light absorption and sensitivity.

Cited by 5 publications

References 10 publications

Plastic optical fibre sensor for Madeira wine monitoring

Plastic optical fibre sensor for Madeira wine monitoring

Multifunction spectrometer for optical inspection of red wine

Refractive index sensor based on etched D-fibres with wavelength adjustable operating point and resolution

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