Optical fiber of high durability prepared from multicomponent glass

摘要

An optical fiber which consists of a multicomponent core glass member which is formed of SiO2, Al2O3 and an alkali metal oxide and preferably contains CaO, MgO and B2O3; and a multicomponent cladding glass member which is prepared from SiO2, Al2O3, an alkali metal oxide and at least one component selected from the group consisting of ZnO, ZrO2 and TiO2, and preferably contains CaO, MgO and B2O3; and consequently reduces transmission loss of light and exhibits prominent durability.