MANUFACTURE OF OPTICAL FIBER BUNDLE

摘要

PURPOSE:To perform excellent vapor deposition by deforming the outer circumference of an end surface of a conduit which is chamfered and deformed from a sharp-ridge state to a surface state. CONSTITUTION:Numbers of optical fibers each formed by coating core glass 1 which has a relatively high refractive index with coating glass which has a relatively low refractive index and acid-soluble glass (glass 2a including both) are heat-sealed and drawn to form the conduit 3. The end surface of the conduit 3 is polished and the ridge formed of the end surface and side surface is chamfered by a chamfering dish 9a; and vapor deposition on the end surface is carried out and acid is brought into contact while the end surface is coated to elute the acid-soluble glass 2a.