Preforms for preparing polygonal-core optical fiber and preparation method thereof

摘要

PURPOSE: A base material for manufacturing polygonal core optical fiber and a method for manufacturing the same are provided to obtain freely manufacture optical fiber of various shaped cores. CONSTITUTION: A method for manufacturing a base material for manufacturing polygonal core optical fiber includes the following: A base material for the optical fiber includes a cladding pipe(2) and a core. The core of a circular cross section is doped on the inner wall of the cladding pipe. The outermost cross section of the cladding pipe is a circular shape. The external part of the doped cladding pipe is ground such that the outermost cross section of the cladding pipe becomes a polygonal shape. The ground gladding pipe is drawn.