TERMINAL PART OF OPTICAL FIBER AND ITS PRODUCTION

摘要

PURPOSE:To prevent the influence of a strong acid and strong alkali to an inorg. adhesive agent and to prevent the deterioration of heat resistance by covering the surface of the optical fiber to be adhered with a metallic oxide film essentially consisting of SiO2. CONSTITUTION:The optical fiber 1 consisting of a core and clad is immersed in an alcohol soln. of ethyl silicate and is dried. This immersion and drying are reiterated to form metallic oxide films contg. >=95% SiO2 to 0.01 - several micron thickness. A ferrule is then adhered and fixed thereto by using an inorg. adhesive agent essentially consisting of alumina and silica. The direct contact of the hard particles of silica and alumina and the strong acid or alkali with the optical fiber is obviated according to the above-mentioned constitution, by which the rupture of the fiber is prevented and the optical fiber terminal having heat resistance up to about 1,000 deg.C is obtd.