METHOD OF MAKING POLARIZATION RETAINING FIBER

摘要

PURPOSE: A manufacturing method for a polarization retaining single-mode optical fiber is provided to be collapsed during the drawing along the length of a preform and for a core to have an oval shaped section. CONSTITUTION: A glass preform (10) is drawn into a fiber. Holes (13), running the length of the preform (10), collapse during the drawing, this causes the core (11) to have an elliptical cross section.