Method of treating the terminal of an optical fibre

摘要

PURPOSE:To obviate a decrease in breaking strength of an optical fiber and to remove a high polymer material, particularly a silicone resin coating layer from the fiber terminal by heating the fiber to deteriorate thermally the properties of the high polymer coating layer and blowing a gas to the deteriorated residue thereof. CONSTITUTION:A capable using silicone resin coated optical fibers is used for an optical fiber cable. An optical fiber (f) is lead out of the cable end and the terminal of one optical fiber is inserted into a heating chamber where the terminal is heat-treated. The conduction of electricity to the heater is thereafter turned off and dry air is blown out in the form of a jet from a nozzle. While such blow-out of the air is continued, the optical fiber terminal is drawn out of the heating chamber and air blowing chamber. The optical fiber removed of the silicone resin coating layer from the terminal in the above-mentioned way is thermally welded and connected. The exceptionally high effect of maintaining the strength is obtd. when the tensile breaking strength of such juncture is measured.