J. Phys. IV France 08 (1998) Pr9-179-Pr9-182
Lead titanate coatings on optical fibers deposited by reactive magnetron sputteringC.A.P. Muller and G.R. Fox
Laboratory of Ceramics, Swiss Federal Institute of Technology, 1015 Lausanne, Switzerland
A Ti/Pt/PbTiO3/Au multilayer thin film structure has been deposited onto standard telecommunication optical fibers. A reactive magnetron sputter deposition technique at high temperature was used to obtain in situ crystallized PbTiO3 thin films with the perovskite structure. PbTiO3 layers with a constant thickness of about 0.81 ± 0.05 µm were obtained over a 5 cm length of fiber, but both microstructure and phase formation vary widely along the fiber length. A dielectric constant of 210 ± 13 and dielectric loss of 0.07 were measured for the phase pure PbTiO3 coated section of fiber. Variations in the coating properties along the fiber can clearly be related to the temperature distribution occurring in the fabrication process.
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