The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform
Marcel Poulain - One of the best experts on this subject based on the ideXlab platform.
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Aging and strength improvement of silica optical fibers
2008Co-Authors: Rochdi El Abdi, Alexandru Rujnski, Marcel Poulain, Irina SeverinAbstract:The reliability and the expected lifetime of optical fibers used in telecommunication technologies are closely related to the chemical environment action on the silica network. To ensure the long-term mechanical strength of the optical fibers, a polymer Coating was applied onto the fiber surface during fiber fabrication. This External Coating is vital to ensure a long fiber lifetime. Its protective action includes several functions, such as to protect glass fiber from any External damage, to limit chemical attack, in particular that of water, and finally to ensure fatigue protection and bending insensitivity. Since the mechanical strength of the fiber is controlled by its surface characteristics, we propose a new method for increasing fiber strength. Submitted to a mechanical stretching, fibers were plunged into hot water and aged for several days. Then, the fibers were removed from the water and various weights were suspended on the fiber ends. Just before the fiber rupture, the fibers were unloaded and subjected to dynamic tensile tests at different velocities. Result analysis proved that the aging in hot water increased the fiber strength. The Weibull's diagram study shows a bimodal dispersion of defects on the fiber surface and the important role of polymer Coating.
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New method for strength improvement of silica optical fibers
Optics and Lasers in Engineering, 2008Co-Authors: A. Rujinsky, Irina Severin, C. Borda, Marcel PoulainAbstract:The reliability and the expected lifetime of optical fibers used in telecommunication technologies are closely related to the chemical environment action on the silica network. To ensure the long-term mechanical strength of the optical fibers, a polymer Coating was applied onto the fiber surface during fiber fabrication. This External Coating is vital to ensure a long optical fiber lifetime. Its protective action includes several functions, such as to protect glass fiber from any External damage, to limit chemical attack, in particular that of water, and finally to ensure fatigue protection and bending insensitivity, especially during handling and in-service installation. Since the mechanical strength of the fiber is controlled by its surface characteristics, we propose a new method for increasing fiber strength. The silica optical fibers used were 125 μm in diameter, with a 62.5 μm thick epoxy-acrylate Coating. Fibers were rolled up around two similar cylinders. Using a screw, these cylinders moved away from one another and thus subjected the fibers to stretching. Submitted to this mechanical loading, the distended fibers were plunged into hot water at 65 or 85 °C and aged for several days. Then, the fibers were removed from the water and various weights were suspended on the fiber ends. Thus, the fibers were subjected to a tensile loading in static fatigue for several days. Just before fiber rupture, the fibers were unloaded and subjected to dynamic tensile tests at different velocities. Result analysis proved that the aging in hot water increased the fiber strength. The Weibull's diagram study shows a bimodal dispersion of defects on the fiber surface and the important role of polymer Coating.
M A Ortiz - One of the best experts on this subject based on the ideXlab platform.
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Elasto–optical behavior model of a step-index fiber under localized pressure
Materials Chemistry and Physics, 2013Co-Authors: A Sanchez, S Orozco, A V Porta, M A OrtizAbstract:Abstract The intensity attenuation of a step-index optical fiber under localized pressure is investigated using the elasto–optical theory and the principles of geometrical optics. A model with a Gaussian variation of the refractive index in the axial direction is used to evaluate the effect of applied pressure on the External Coating of the fiber. The results are compared with experimental measurements obtained using a prototype of an optical fiber pressure sensor.
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elasto optical behavior model of a step index fiber under localized pressure
Materials Chemistry and Physics, 2013Co-Authors: A Sanchez, S Orozco, A V Porta, M A OrtizAbstract:Abstract The intensity attenuation of a step-index optical fiber under localized pressure is investigated using the elasto–optical theory and the principles of geometrical optics. A model with a Gaussian variation of the refractive index in the axial direction is used to evaluate the effect of applied pressure on the External Coating of the fiber. The results are compared with experimental measurements obtained using a prototype of an optical fiber pressure sensor.
A. Rujinsky - One of the best experts on this subject based on the ideXlab platform.
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New method for strength improvement of silica optical fibers
Optics and Lasers in Engineering, 2008Co-Authors: A. Rujinsky, Irina Severin, C. Borda, Marcel PoulainAbstract:The reliability and the expected lifetime of optical fibers used in telecommunication technologies are closely related to the chemical environment action on the silica network. To ensure the long-term mechanical strength of the optical fibers, a polymer Coating was applied onto the fiber surface during fiber fabrication. This External Coating is vital to ensure a long optical fiber lifetime. Its protective action includes several functions, such as to protect glass fiber from any External damage, to limit chemical attack, in particular that of water, and finally to ensure fatigue protection and bending insensitivity, especially during handling and in-service installation. Since the mechanical strength of the fiber is controlled by its surface characteristics, we propose a new method for increasing fiber strength. The silica optical fibers used were 125 μm in diameter, with a 62.5 μm thick epoxy-acrylate Coating. Fibers were rolled up around two similar cylinders. Using a screw, these cylinders moved away from one another and thus subjected the fibers to stretching. Submitted to this mechanical loading, the distended fibers were plunged into hot water at 65 or 85 °C and aged for several days. Then, the fibers were removed from the water and various weights were suspended on the fiber ends. Thus, the fibers were subjected to a tensile loading in static fatigue for several days. Just before fiber rupture, the fibers were unloaded and subjected to dynamic tensile tests at different velocities. Result analysis proved that the aging in hot water increased the fiber strength. The Weibull's diagram study shows a bimodal dispersion of defects on the fiber surface and the important role of polymer Coating.
Irina Severin - One of the best experts on this subject based on the ideXlab platform.
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Aging and strength improvement of silica optical fibers
2008Co-Authors: Rochdi El Abdi, Alexandru Rujnski, Marcel Poulain, Irina SeverinAbstract:The reliability and the expected lifetime of optical fibers used in telecommunication technologies are closely related to the chemical environment action on the silica network. To ensure the long-term mechanical strength of the optical fibers, a polymer Coating was applied onto the fiber surface during fiber fabrication. This External Coating is vital to ensure a long fiber lifetime. Its protective action includes several functions, such as to protect glass fiber from any External damage, to limit chemical attack, in particular that of water, and finally to ensure fatigue protection and bending insensitivity. Since the mechanical strength of the fiber is controlled by its surface characteristics, we propose a new method for increasing fiber strength. Submitted to a mechanical stretching, fibers were plunged into hot water and aged for several days. Then, the fibers were removed from the water and various weights were suspended on the fiber ends. Just before the fiber rupture, the fibers were unloaded and subjected to dynamic tensile tests at different velocities. Result analysis proved that the aging in hot water increased the fiber strength. The Weibull's diagram study shows a bimodal dispersion of defects on the fiber surface and the important role of polymer Coating.
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New method for strength improvement of silica optical fibers
Optics and Lasers in Engineering, 2008Co-Authors: A. Rujinsky, Irina Severin, C. Borda, Marcel PoulainAbstract:The reliability and the expected lifetime of optical fibers used in telecommunication technologies are closely related to the chemical environment action on the silica network. To ensure the long-term mechanical strength of the optical fibers, a polymer Coating was applied onto the fiber surface during fiber fabrication. This External Coating is vital to ensure a long optical fiber lifetime. Its protective action includes several functions, such as to protect glass fiber from any External damage, to limit chemical attack, in particular that of water, and finally to ensure fatigue protection and bending insensitivity, especially during handling and in-service installation. Since the mechanical strength of the fiber is controlled by its surface characteristics, we propose a new method for increasing fiber strength. The silica optical fibers used were 125 μm in diameter, with a 62.5 μm thick epoxy-acrylate Coating. Fibers were rolled up around two similar cylinders. Using a screw, these cylinders moved away from one another and thus subjected the fibers to stretching. Submitted to this mechanical loading, the distended fibers were plunged into hot water at 65 or 85 °C and aged for several days. Then, the fibers were removed from the water and various weights were suspended on the fiber ends. Thus, the fibers were subjected to a tensile loading in static fatigue for several days. Just before fiber rupture, the fibers were unloaded and subjected to dynamic tensile tests at different velocities. Result analysis proved that the aging in hot water increased the fiber strength. The Weibull's diagram study shows a bimodal dispersion of defects on the fiber surface and the important role of polymer Coating.
A Sanchez - One of the best experts on this subject based on the ideXlab platform.
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Elasto–optical behavior model of a step-index fiber under localized pressure
Materials Chemistry and Physics, 2013Co-Authors: A Sanchez, S Orozco, A V Porta, M A OrtizAbstract:Abstract The intensity attenuation of a step-index optical fiber under localized pressure is investigated using the elasto–optical theory and the principles of geometrical optics. A model with a Gaussian variation of the refractive index in the axial direction is used to evaluate the effect of applied pressure on the External Coating of the fiber. The results are compared with experimental measurements obtained using a prototype of an optical fiber pressure sensor.
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elasto optical behavior model of a step index fiber under localized pressure
Materials Chemistry and Physics, 2013Co-Authors: A Sanchez, S Orozco, A V Porta, M A OrtizAbstract:Abstract The intensity attenuation of a step-index optical fiber under localized pressure is investigated using the elasto–optical theory and the principles of geometrical optics. A model with a Gaussian variation of the refractive index in the axial direction is used to evaluate the effect of applied pressure on the External Coating of the fiber. The results are compared with experimental measurements obtained using a prototype of an optical fiber pressure sensor.
