| 摘要 |
A single mode optical fiber comprises: (i) a segmented core having at least three segments and (ii) a silica based clad layer surrounding and in contact with the core, the clad layer having a refractive index nc.. The first segment has a ? max % in the range of about 0.75 to 1.1, and ?o % = 0.6?max %, and an outer radius r 1 in the range of about 1.5 to 3.0 µm. The second segment has a ? 2 % in the range of 0.00 to 0.15%. The third segment has a ? 3 % in the range of less than 0.35%, an outer radius r3 in the range of about 7 µm to 11 µm, a width W3 in the range of about 1.5 to 3 µm, and volume V 3 2 . The refractive index profiles of the core segments are selected to provide: zero dispersion wavelength in the range of about 1565 nm to 1600 nm; total dispersion at 1550 nm in the range of about -6 to-0.5 ps/nm-km; and dispersion slope at 1550 nm is greater than 0.1. |
