PRODUCTION OF BRANCHING D-TYPE FIBER

摘要

PURPOSE:To produce easily a branching D-type fiber having high quality by allowing two cut D-type fibers to face each other and coupling them by welding or matching oil. CONSTITUTION:A fiber base material 3 consisting of a core 1 and a clad 2 is worked preliminarily into a D-shape, and this base material is subjected to wire drawing at a proper temperature by an optical fiber draw bench 4 to produce the D-type fiber 5, and this D-type fiber 5 is cut to a proper length, and two cut D-type fibers 5 are matched back to back and are coupled with welding or matching oil.