DISPERSION COMPENSATED OPTICAL FIBER FOR MULTIWAVELENGTH TRANSMISSION

摘要

PURPOSE: To provide a dispersion compensated optical fiber suitable for multiwavelength optical transmission. CONSTITUTION: The distribution of refractive index of this dispersion compensated optical fiber is made to be a W-shape distribution. The fiber consists of a core 1, inner clad layer 2 set on the outside of core 1 and a pure quartz outermost clad layer is set on the outside of it. The core 1 is doped with Ge to increase the refractive index by 2.8% difference of the refractive index, while the inner clad layer is homogeneously doped with fluorine to decrease the refractive index by 0.45%. The ratio of diameters of the core 1 to the inner clad layer 2 is controlled to 1:1.5 to 1:4.0. The fiber has a high negative dispersion structure as <=-100ps/nm/km dispersion in the region where the slope of the wavelength dispersion is negative.