Capillary optical fibers based on SiO2 –TiO2–P2O5 and TiO2–P2O5 internal coatings prepared by sol-gel method

A novel approach for preparation of capillary optical fibers using sol-gel method.New materials: silica-titania-phosphorus pentoxide and titania-phosphorus pentoxide.Homogenous and low-loss single layers of these materials.A novel modification of the application of thin layers on the inner walls of the silica tubes.Capillary fibers with attenuations below 0.02 dB/cm were prepared.