The light transmission and distribution in an optical fiber coated with TiO2 particles

The light delivery and distribution phenomena along the optical fiber coated with the P-25 TiO2 particles by dipping was investigated. The surface properties (coverage, roughness and thickness) of the TiO2 layer coated on the optical fiber were characterized by SEM micrographs. For TiO2 layer prepared from solutions containing less than 20 wt.% of TiO2 slurry, the thickness of layer was increased linearly with the TiO2 slurry content in solutions. The UV light intensity transmitted along a TiO2-coated optical fiber decreased more rapidly than that transmitted along a non-coated fiber. Based on the experimental results, the light intensity distribution around a coated optical fiber was modeled to determine the optimum configuration for the design of optical fiber reactors under various operational conditions.