A multimode optical-fiber sensor-network for the simultaneous monitoring of heat andproximity is ... more A multimode optical-fiber sensor-network for the simultaneous monitoring of heat andproximity is presented. The interrogation and processing system makes use of the short- wavelengths OTDR technique. The network topology is a hybrid configuration of reflective- tree and transmissive-ladder architectures, which are operative for temperature and proximitysensors, respectively.Temperature sensors are operative in the 20-80°C range with a best resolution of atleast 0.3°C. Proximity sensors can operate either as on/off devices or as analog sensors. Theranges of operation and resolutions can be varied according to the geometrical arrangementof the probes.
Optica Acta: International Journal of Optics, 1980
A technique for drawing ‘silica plastic’ fibres is described, along with the transmission and mec... more A technique for drawing ‘silica plastic’ fibres is described, along with the transmission and mechanical characteristics of the fabricated fibres. A number of applications of these fibres is also reported, including computer interconnection systems, r.f. reference signal transmission and the propagation of laser radiation through optical fibres for use in surgery.
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2009
ABSTRACT Er3+-doped tellurite glasses are of great interest for the fabrication of active integra... more ABSTRACT Er3+-doped tellurite glasses are of great interest for the fabrication of active integrated optical circuits because of their unique properties in terms of bandwidth and rare-earth solubility. Multimode channel waveguides in a glass of this family, namely, a sodium–tungsten–tellurite glass, have been realized with high-energy ion irradiation, where the ion beam size in one dimension was reduced to a few tens of micrometers by a silicon mask. This approach makes possible the fast fabrication of waveguides with high aspect ratio (∼103). The 24 μm wide and 10 mm long waveguide stripes achieved by 1.5 MeV N+ irradiation with fluences between 5 × 1015 and 4.0 × 1016 ions/cm2 were studied using interference phase contrast microscopy and surface profilometry. The waveguiding effect was investigated by the end-fire coupling technique. Multimode light propagation has indeed been observed in these channels, confirming the effectiveness of this method. Dark-line spectroscopy revealed that light propagated in the channel via the optical barrier formed by the N+ implantation.
... CAMY, P., ROMAN, J, E., WILLEMS, F. W., HEMPSTEAD, M., VAN DER PLAATS, J. C., PREL, C., BEGUI... more ... CAMY, P., ROMAN, J, E., WILLEMS, F. W., HEMPSTEAD, M., VAN DER PLAATS, J. C., PREL, C., BEGUIN, A., KOONEN, A. M. J., WILKINSON, JS, and LERMINIAUX, C., 1996, Electron Lett., 32, 321. ... FERRARI, M., GONELLA, F., MONTAGNA, M., and TOSELLO, C. 1996, J. appl. ...
ABSTRACT A fiber optic thermometric device, which allows to control 19 measuring points, is prese... more ABSTRACT A fiber optic thermometric device, which allows to control 19 measuring points, is presented. It utilizes a single electro-optical unit, and an electro-mechanical optical scanner to address the sensor array. Each sensor is intensity modulated type, and utilizes as transducer a differential absorption thermochromic solution, working in the 5°-75°C temperature range. A self-focusing probe is adopted, which presents low intrinsic loss so to achieve high signal-to-noise-ratio.
Long-Period Fiber Gratings (LPFGs) were fabricated in single mode fibers (SMF28) by using electri... more Long-Period Fiber Gratings (LPFGs) were fabricated in single mode fibers (SMF28) by using electric arc discharges produced from a commercial fiber splicer. In our experimental set-up, we noticed that, during each arc, the fiber becomes slightly tapered due to the presence of the longitudinal tension: the quantitative effect depends on the time length and arc power. We have experimentally studied
ABSTRACT The different absorption with temperature of a thermochromic solution is used as tempera... more ABSTRACT The different absorption with temperature of a thermochromic solution is used as temperature sensing. The implemented version of the device is presented with technical data of the optoelectronic system and the experimental results.
Proceedings of SPIE - The International Society for Optical Engineering
abstract Integrated optical devices including rare earth ions are attracting an increasing attent... more abstract Integrated optical devices including rare earth ions are attracting an increasing attention. We designed and developed a soda-lime silicate glass matrix, suitable for ion-exchange, and we doped it with different percentages of Er 2 O 3 and Yb 2-O 3. Optical waveguides have then been produced by diluted silver ion exchange. Here we report on their optical characterization, which has been performed by m-line spectroscopy as well by absorption, FTIR and Raman spectroscopy.
A multimode optical-fiber sensor-network for the simultaneous monitoring of heat andproximity is ... more A multimode optical-fiber sensor-network for the simultaneous monitoring of heat andproximity is presented. The interrogation and processing system makes use of the short- wavelengths OTDR technique. The network topology is a hybrid configuration of reflective- tree and transmissive-ladder architectures, which are operative for temperature and proximitysensors, respectively.Temperature sensors are operative in the 20-80°C range with a best resolution of atleast 0.3°C. Proximity sensors can operate either as on/off devices or as analog sensors. Theranges of operation and resolutions can be varied according to the geometrical arrangementof the probes.
Optica Acta: International Journal of Optics, 1980
A technique for drawing ‘silica plastic’ fibres is described, along with the transmission and mec... more A technique for drawing ‘silica plastic’ fibres is described, along with the transmission and mechanical characteristics of the fabricated fibres. A number of applications of these fibres is also reported, including computer interconnection systems, r.f. reference signal transmission and the propagation of laser radiation through optical fibres for use in surgery.
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2009
ABSTRACT Er3+-doped tellurite glasses are of great interest for the fabrication of active integra... more ABSTRACT Er3+-doped tellurite glasses are of great interest for the fabrication of active integrated optical circuits because of their unique properties in terms of bandwidth and rare-earth solubility. Multimode channel waveguides in a glass of this family, namely, a sodium–tungsten–tellurite glass, have been realized with high-energy ion irradiation, where the ion beam size in one dimension was reduced to a few tens of micrometers by a silicon mask. This approach makes possible the fast fabrication of waveguides with high aspect ratio (∼103). The 24 μm wide and 10 mm long waveguide stripes achieved by 1.5 MeV N+ irradiation with fluences between 5 × 1015 and 4.0 × 1016 ions/cm2 were studied using interference phase contrast microscopy and surface profilometry. The waveguiding effect was investigated by the end-fire coupling technique. Multimode light propagation has indeed been observed in these channels, confirming the effectiveness of this method. Dark-line spectroscopy revealed that light propagated in the channel via the optical barrier formed by the N+ implantation.
... CAMY, P., ROMAN, J, E., WILLEMS, F. W., HEMPSTEAD, M., VAN DER PLAATS, J. C., PREL, C., BEGUI... more ... CAMY, P., ROMAN, J, E., WILLEMS, F. W., HEMPSTEAD, M., VAN DER PLAATS, J. C., PREL, C., BEGUIN, A., KOONEN, A. M. J., WILKINSON, JS, and LERMINIAUX, C., 1996, Electron Lett., 32, 321. ... FERRARI, M., GONELLA, F., MONTAGNA, M., and TOSELLO, C. 1996, J. appl. ...
ABSTRACT A fiber optic thermometric device, which allows to control 19 measuring points, is prese... more ABSTRACT A fiber optic thermometric device, which allows to control 19 measuring points, is presented. It utilizes a single electro-optical unit, and an electro-mechanical optical scanner to address the sensor array. Each sensor is intensity modulated type, and utilizes as transducer a differential absorption thermochromic solution, working in the 5°-75°C temperature range. A self-focusing probe is adopted, which presents low intrinsic loss so to achieve high signal-to-noise-ratio.
Long-Period Fiber Gratings (LPFGs) were fabricated in single mode fibers (SMF28) by using electri... more Long-Period Fiber Gratings (LPFGs) were fabricated in single mode fibers (SMF28) by using electric arc discharges produced from a commercial fiber splicer. In our experimental set-up, we noticed that, during each arc, the fiber becomes slightly tapered due to the presence of the longitudinal tension: the quantitative effect depends on the time length and arc power. We have experimentally studied
ABSTRACT The different absorption with temperature of a thermochromic solution is used as tempera... more ABSTRACT The different absorption with temperature of a thermochromic solution is used as temperature sensing. The implemented version of the device is presented with technical data of the optoelectronic system and the experimental results.
Proceedings of SPIE - The International Society for Optical Engineering
abstract Integrated optical devices including rare earth ions are attracting an increasing attent... more abstract Integrated optical devices including rare earth ions are attracting an increasing attention. We designed and developed a soda-lime silicate glass matrix, suitable for ion-exchange, and we doped it with different percentages of Er 2 O 3 and Yb 2-O 3. Optical waveguides have then been produced by diluted silver ion exchange. Here we report on their optical characterization, which has been performed by m-line spectroscopy as well by absorption, FTIR and Raman spectroscopy.
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Papers by Massimo Brenci