HEAT RESISTANT OPTICAL FIBER CORE

摘要

A heat resistant optical fiber core which is provided with a coating (20) consisting of a first coating layer (21) made of aromatic polyimide resin, a second coating layer (22) made of silicon resin and a third coating layer (23) made of moisture resistant resin, such as PFA, having a heat resistance equivalent to that of the first coating layer (21), all formed on the outer peripheral of an optical fiber (10).