| 摘要 |
PURPOSE:To decrease the connection loss to optical fibers and to eliminate the change of a transmission characteristic by external atmosphere by including a stage for depositing pulverized core glass particles by a thermal oxidation reaction or hydrolysis reaction on a glass substrate, heating the same to a high temp. and vitrifying the particles to transparent glass. CONSTITUTION:The optical fiber 4 of the length projecting from the side part of the starting glass quartz substrate 3 is embedded in a guide groove 32 for connection along said groove. The pulverized glass particles are then deposited on the substrate 3 by using a glass prepd. by mixing a refractive index increasing dopant such as geCl4 with SiCl4 which is the essential raw material for glass as a glass raw material for the glass. The deposited particles are heat-treated at a high temp. to form the transparent core glass 5 consisting of GeO2-SiO2. Etching is thereafter so executed that only the core glass 5 formed in the grooves of the pattern to be used as the core for the optical waveguide remains. The pulverous glass particles to be formed as the clad glass are deposited on the substrate 3 by a deposition method for pulverized glass particles using SiCl4 as the glass raw material for the glass in succession thereof and is sintered at a high temp. |
