METHOD FOR CORRECTING BENDING SET OF OPTICAL FIBER CORE AND SLEEVE THEREOF

摘要

PURPOSE:To permit correction of a bending set by heating an optical fiber core where the bending set remains to a specific heating temp. while maintaining said fiber core in a straight state. CONSTITUTION:An inside tube 10 of a bending set correcting sleeve 13 has the bore to allow passage of the optical fiber core 2 and an outside tube 11 is provided with a cavity layer 12 and is disposed coaxially with the inside tube 10. The layer 12 is closed at both ends of the sleeve 13 so as to have a closed space. Correction of the bending set is executed by stopping heating by a heater, then inserting the optical fiber core having the bending set into the central hole of the sleeve 13 and moving the same while maintaining the straight state. The heating temp. is set within the temp. range above the glass transition point of the core coating material and below the temp. at which the residual strain by shrinkage on heating does not affect the transmission characteristics. The bending set is thereby corrected.