Effect of preparation of sol-gel coatings on the strength of optical fibres |
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| Authors: | Vlastimil Matejec Miloš Hayer Peter Pavlovič Marta Kubečková Gabriela Kuncová Massimo Guglielmi |
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| Institution: | (1) Institute of the Radio Engineering and Electronics, Academy of Sciences of Czech Republic, Chaberská 57, 182 51 Praha 8;(2) Institute of Chemical Process Fundamentals, Academy of Sciences of Czech Republic, Rozvojová 135, 165 02 Praha 6;(3) Dipartimento di Ingegneria Meccanica, Sez. Materiali, Via Marzolo 9, 35100 Padova, Italy |
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| Abstract: | SiO2, TiO2, ZrO2, and TiO2-ZrO2 thin coatings were applied by sol-gel method on quartz fibres during the fibre drawing. Durable layers with the thicknesses up to 0.7  m were obtained. The layer smoothness and thickness were determined using electron microprobe analyzer and electron or optical microscopy. In order to investigate a decrease in the strength of sol-gel coated fibres a novel method employing silica capillaries was developed. The fibre strength decrease was explained by the influence of water penetrating as a result of the coating process into the flaws on the fibre surface. |
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| Keywords: | thin layer sol-gel process optical fibre mechanical strength decrease water influence |
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