Patent ID: 7102812

Claim:
A dispersion compensating device having an input and an output, the device comprising: a dispersion compensating fiber having a dispersion more negative than −100 ps/nm/km over a wavelength range situated at within 1555 nm to 1615 nm; a Raman gain fiber having a dispersion more positive than −40 ps/nm/km over said wavelength range; and a pump source operatively coupled to the dispersion compensating fiber and the Raman gain fiber, the pump source operating at a pump wavelength, wherein the dispersion compensating fiber has a Raman Figure of Merit at the pump wavelength, and wherein the Raman gain fiber has a Raman Figure of Merit at least equivalent to the Raman Figure of Merit of the dispersion compensating fiber, and wherein the dispersion compensating fiber and the Raman gain fiber are arranged in series between the input and the output of the device.