Optical fiber and optical transmission line

Details Optical fiber and optical transmission line Optical fiber and optical transmission line

H - Electricity

04

B

H04B 10/12 (2006.01) G02B 6/036 (2006.01)

Patent

CA 2371044

The optical fiber includes a center core portion, a side core portion and clad portion in an order from an inner side, which has a dispersion value of 14 ps/nm/km or higher and 20 ps/nm/km or less at a wavelength of 1550 nm, a dispersion slope of 0.05 ps/nm2/km or higher and 0.08 ps/nm2/km or less at a wavelength of 1550 nm and a transmission attenuation of 0.2 dB/km or less at a wavelength of 1550 nm, wherein the relative refractive index difference .DELTA.1 between the center core portion and the clad portion is 0.25% or larger and 0.50% or less, the relative refractive index difference .DELTA.2 between the side core portion and the clad portion is 0.05% or larger and 0.30% or less, an inequality .DELTA.2 < .DELTA.1 is satisfied, the ratio a/b between an outer diameter a of the center core portion and an outer diameter b of the side core portion is 0.3 or higher and 0.7 or less, and the effective core area Aeff at a wavelength of 1550 nm is 90 µm2 or larger.

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