Fitel USA Corporation

Bent Edvold

Lars Gruner-Nielsen

William Alfred Reed

Torben Erik Veng

Stig Nissen Knudsen

Lene V Jorgensen

A dispersion compensation module (DCM) for compensating dispersion of an optical fiber transmission link is provided. The optical fiber transmission link comprises a transmission fiber and the DCM. The DCM comprises at least first and second dispersion compensating fibers, DCF and DCF , respectively. DCF and DCF each have a dispersion, D and D , respectively, a dispersion slope, S and S , respectively, and a relative dispersion slope, RDS and RDS , respectively. The transmission fiber also has a dispersion, D , a dispersion slope, S , and a relative dispersion slope, RDS . DCF and DCF are selected based on their respective relative dispersion slopes, RDS and RDS , respectively. DCF and DCF have particular, lengths, L and L , respectively. The DCFs are combined with each other and with the transmission fiber and RDS and RDS are such that the combination of the transmission fiber with the combined DCFs results in overall dispersion compensation of the optical fiber transmission link.

Method and apparatus for providing dispersion compensation

A dispersion compensating fiber is described having a core and cladding as well as methods for making such fiber. The cladding has a first cladding region surrounding the core, a second cladding region surrounding the first cladding region, and a third cladding region surrounding the second cladding region. The core, and the first, second, and third cladding regions are doped to create a refraction index profile characteristic of dispersion compensating fiber. The core is doped with germanium, the first cladding region is doped with fluorine, and the second cladding region is doped with germanium and fluorine. A portion of the cladding is doped with phosphorus, thereby resulting in splice loss reduction.

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Vallensbæk, Denmark

Bent Edvold