PRODUCTION OF ELLIPTICAL JACKET TYPE OPTICAL FIBER RESERVING POLARIZED PLANE

摘要

PURPOSE:To produce the title optical fiber having excellent extinction ratio in continuous length in low costs by filling the space of a specific silica glass rod with the core rod and a plurality of glass rod fibers, melting them into a solid body and melt-drawing into fiber. CONSTITUTION:(A) The core rod 5 is inserted into (B) the space 2 of elliptic section extending longitudinally along the center axis of the rod 1 and (C) a plurality of glass rod lines 4 containing B and P are arranged in the space 2 around the core rod. They are fused integrally into a solid body and melt- drawn into fiber.