Patent ID: 6580861
Filing Date: 2003-06-17
Classification: G02B,H04B

Abstract:
An optical transmission system including optical fiber, the optical transmission system transmitting in a predetermined wavelength range bounded by a first wavelength and a second wavelength and having a selected wavelength and a substantially central wavelength, the system comprising:a series of consecutive blocks of optical fiber, the consecutive blocks optically coupled to each other, wherein each consecutive block of optical fiber comprises: a first series of N spans of optical fiber optically coupled to each other, where N&gE;zero, the spans of the first series arranged consecutively, wherein each span of the first series comprises a fiber type having positive dispersion at the substantially central wavelength and a fiber type having negative dispersion at the substantially central wavelength; a second series of M spans of optical fiber optically coupled to each other, where M>zero, the spans of the second series arranged consecutively, wherein each span of the second series comprises substantially only a single type of fiber; and a third series of O spans of optical fiber optically coupled to each other, where O&gE;zero and N+O&gE;2, the spans of the third series arranged consecutively, wherein each span of the third series comprises a fiber type having positive dispersion at the substantially central wavelength and a fiber type having negative dispersion at the substantially central wavelength, wherein the first, second, and third series are arranged consecutively; wherein the individual dispersion products of the first, second, and third series are substantially not zero at the substantially central wavelength, the sum of the dispersion products of the first, second, and third series is substantially zero at the selected wavelength, and the average dispersion slope in each block at the selected wavelength is between âˆ’0.01 and 0.01 ps/nm2-km.