| 摘要 |
An optical fiber comprising a first core, a second core, a third core, and a cladding, wherein the expressions 0.30% ‰¤ ”1 ‰¤ 0.45%, -0.05% ‰¤ ”2 ‰¤ 0.05%, -0.35% < ”3 ‰¤ -0.15%, 2.5 ‰¤ b/a, 3.5 µm ‰¤ a ‰¤ 4.2 µm, 9 µm ‰¤ b ‰¤ 13 µm, and 4.5 µm ‰¤ c-b ‰¤ 7.0 µm are satisfied, a zero-dispersion wavelength is no less than 1300 nm and no greater than 1324 nm, and transmission loss increase for a wavelength of 1550 nm when the optical fiber is wound around a mandrel with a diameter of 10 mm is no greater than 1 dB/turn. |
