Current Developments in Optical Fiber Technology 2013
DOI: 10.5772/55376
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Refractometric Optical Fiber Platforms for Label Free Sensing

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Cited by 16 publications
(13 citation statements)
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References 79 publications
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“…In brief, attenuation bands arise when light couples from the core mode into co-propagating cladding modes. [34][35][36] Changes in refractive index near the sensor's cladding surface caused a change in the effective refractive index of the cladding modes, 27,28 resulting in coupling to occur at different wavelengths and a wavelength shift (x axis shift) of the attenuation bands/peaks (Fig. 4).…”
Section: Lpg Sensor Response In P Aeruginosa Culturesmentioning
confidence: 99%
See 2 more Smart Citations
“…In brief, attenuation bands arise when light couples from the core mode into co-propagating cladding modes. [34][35][36] Changes in refractive index near the sensor's cladding surface caused a change in the effective refractive index of the cladding modes, 27,28 resulting in coupling to occur at different wavelengths and a wavelength shift (x axis shift) of the attenuation bands/peaks (Fig. 4).…”
Section: Lpg Sensor Response In P Aeruginosa Culturesmentioning
confidence: 99%
“…The LPG sensor is also sensitive to temperature and strain on the fibre, which could be compensated using a reference LPG. [34][35][36][37] In the clinic, the instrumented ETT ( Fig. 4) would provide a constant readout of wavelength shift, which can then be used to estimate the biomass of any biofilm on the surface of the device.…”
Section: Design Of a Sensor-instrumented Ettmentioning
confidence: 99%
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“…The end of a fiber was functionalized with five layers of silver nanoparticles using sol-gel as a binding agent (Figure 4). When molecules in a microchannel are illuminated with laser light, a small number of photons can undergo Raman (inelastic) scattering with an excited state vibrational mode of the [35] Fiber Bragg Gratings [36] 3.3 × 10 -5 2 × 10 -6 Long Period Gratings [37] 1.9 × 10 -6 Optical Fiber Tapers [38] 3.7 × 10 −6 Surface Plasmonic Resonance [39] 7.0 × 10 −7 molecule such that the molecule either gains or loses energy to a re-emitted photon [42]. One advantage of Raman scattering is that molecules having similar chemical composition and whose fluorescence emissions overlap can be individually recognized because the vibrational energies of the molecules will be unique, leading to Raman scattered wavelengths that are distinct and separated.…”
Section: Fiber Optic Spectroscopy Within a Microchannelmentioning
confidence: 99%
“…The necessary adjustments, considering the sensing head operation at 1550 nm, can be made using the Cauchy equation with the respective coefficients (Fogg et al, 1955;El-Kashef, 2000). The corrected sensitivity of the device considering the wavelength of the studied resonance is around 150 nm RIU À 1 (Gouveia, 2013). The LPGs have also a known sensitivity to temperature variations and a characterization was performed to determine if their thermal behavior was within the expected values.…”
Section: Lpgs Fabrication and Characterizationmentioning
confidence: 99%