| 摘要 |
An optical fiber having a chromatic dispersion of +1.0 ps/nm/km or more in a 1460 nm wavelength band, a dispersion slope of 0.04 ps/nm2/km or more in a 1550 nm wavelength band, and a cutoff wavelength of 1450 nm or less, comprises a relation of an RDS, which is a value of the dispersion slope to the chromatic dispersion, to a wavelength lambd is -1.67x10-5lambd+0.0300>=RDS(lambd)>=-1.67x10-5lambd+0.0285.
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