METHOD OF MANUFACTURING PREFORM OF NON-ZERO DISPERSION SHIFTED FIBER

摘要

PURPOSE: A method of manufacturing preform of non-zero dispersion shifted fiber is provided to transmit mass signals to a long distance on a DWDM system by minimizing compensation for dispersion along the wide bandwidth. CONSTITUTION: In a method of manufacturing preform of non-zero dispersion shifted fiber, in step (one), a suite deposit for cradding is produced by depositing porous glass particles on a glass load while hydrolyzing glass under heats. In step (two), The suite deposit is dehydrated and the OH is eliminated. In step (three), the suite deposit without the OH is deadburned at an adequate temperature, producing transparent glass. In step (four), the glass is extruded to make a glass stick for core layer. In step (five), the glass stick is again hydrolyzed under heat to produce another suite deposit. In step (six), The suite deposit is again deadburned to produce the final product.