METHODS FOR MANUFACTURING OPTICAL FIBER PREFORM, AND HOLLOW-STRUCTURED OPTICAL FIBER, AND CONNECTOR FOR PRESSURE-IMPRESSION/REDUCTION

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing an optical fiber preform for a hollow-structured optical fiber, which can easily up-sizing the optical fiber preform, and can reduce the manufacture cost; and to provide a method for manufacturing a hollow-structured optical fiber, and a connector for pressure-impression/reduction.;SOLUTION: The method for manufacturing a hollow-structured optical fiber having a core part and a clad part formed on the outer periphery of the core part and having hollows includes a hollow-forming glass tube preparation step of preparing a hollow-forming glass tube in which hollows to elongate in the longitudinal direction are formed in the circumference of an opening hole, a clad outer circumference formation step of forming a clad outer circumference to become an outer circumference region of a clad part in the circumference of the hollow-forming glass tube, an insertion step of inserting a core glass rod having a region to become a core part inside the hollow-forming glass tube, and an integration step of heating the hollow-forming glass tube in which the core glass rod has been inserted to integrate the core glass rod and the hollow-forming glass tube.;COPYRIGHT: (C)2012,JPO&INPIT