PRODUCTION OF PREFORM FOR UNIFORMLY POLARIZING OPTICAL FIBER

摘要

PURPOSE:To provide a method for producing a preform for a uniformly polarizing optical fiber by which a high quality constant polarization optical fiber can be efficiently and easily obtd. CONSTITUTION:A cylindrical body 11 made of a quartz material doped with an expansion coefft. adjusting material is entirely coated with compact of quartz powder 13 and this compact is refined and sintered to produce a stress applying member. This member is embedded in a preform for an optical fiber made of a quartz material and the preform is drawn to produce a constant polarization optical fiber.