Patent ID: 6567595
Filing Date: 2003-05-20
Classification: G02B,H04B

Abstract:
An optical fiber line provided between optical amplifiers adjacent to each other, comprising:two or more positive dispersion optical fibers, having a positive chromatic dispersion in a signal wavelength band, selected from a positive dispersion optical fiber group whose cumulative dispersion conforms to a distribution with an average value of DA (>0) and a standard deviation of &sgr;A; and two or more negative dispersion optical fibers, having a negative chromatic dispersion in the signal wavelength band, selected from a negative dispersion optical fiber group whose cumulative dispersion conforms to a distribution with an average value of DB (<0) and a standard deviation of &sgr;B; wherein absolute value of a sum of average values DA and DB is not greater than 20% of the average value DA, whereas absolute value of a difference between standard deviations &sgr;A and &sgr;B is not greater than 20% of the standard deviation &sgr;A; and wherein said positive dispersion optical fibers and said negative dispersion optical fibers are alternately arranged and in direct contact with each other.