Patent ID: 6633715
Filing Date: 2003-10-14
Classification: G02B

Abstract:
An optical fiber communications system, comprising:at least one source of optical energy; an optical fiber cable including at least one positive dispersion optical fiber coupled to the at least one source for transmitting optical energy from the source, and at least one inverse dispersion optical fiber coupled to the positive dispersion optical fiber, wherein the inverse dispersion optical fiber includes a doped core region having an index of refraction n1, a cladding region having an index of refraction n2, wherein 0.745%1âˆ’n2)/n2<0.759%, a trench region between the doped core region and the cladding region and adjacent the doped core region, the trench region having an index of refraction n3, wherein âˆ’0.403%3âˆ’n2)/n2a first barrier region between the doped core region and the cladding region and adjacent the trench region, the first barrier region having an index of refraction n4, wherein 0.152%4âˆ’n2)/n2<0.166%, and a second barrier region between the doped core region and the cladding region and adjacent the first barrier region, the second barrier region having an index of refraction n5, wherein âˆ’0.083%5âˆ’n2)/n2at least one receiver coupled to the invention dispersion optical fiber for receiving optical energy from the source.