OPTICAL FIBER, DISPERSION COMPENSATOR COMPRISING THE SAME, OPTICAL TRANSMISSION LINE, AND OPTICAL TRANSMISSION SYSTEM

摘要

Disclosed is an optical fiber, which comprises a core and a clad of a two-layer structure including an innermost layer and an outermost layer, and has a refractive index distribution structure satisfying the conditions of 0.8% ≦ Δ1 ≦ 1.3% and -0.7% ≦ Δ2 ≦ -0.4%, where Δ1 represents a relative refractive index difference of the core with respect to the outermost layer of the clad, and Δ 2 represents a relative refractive index difference of the innermost layer of the clad with respect to the outermost layer of the clad, and also satisfying the conditions of -20 ≦ D ≦ 0, -0.1 ≦ S 0 and 0 ≦ (D/S) ≦ 200 in a specified wavelength band having a band width of at least 20 nm in a 1.5 µm wavelength band, where D represents the chromatic dispersion (ps/nm/km) at a specified wavelength in a 1.5 µm wavelength band, and S represents the dispersion slope (ps/nm2/km).