| 摘要 |
<p>An optical fiber (1) suitable for connection with a single mode optical fiber for wavelength division multiplex transmission, that is, a reverse dispersion fiber (RDF) having a center core (11) and a side core layer (12), wherein an apparent refractive index difference of the center core is 1.15 to 1.40%, a constant alpha expressing a profile of a distribution of refractive index of the center core (11) is 1.0 to 5.0, an apparent refractive index difference of the side core layer (12) is -0.60 to -0.35, a diameter ratio (b/a) of a diameter (b) of the first side core layer (12) to a diameter (a) of the center core (11) is 1.6 to 2.4, a dispersion value is -60 to -35 ps/nm/km and a dispersion slope is -0.40 to -0.10 ps/nm<2>/km when a wavelength of light propagated through the center core (11) is the 1.55 mu m band, a transmission loss of not more than 0.35 dB/km, a ratio of loss to dispersion (figure of merit (FOM)) of 120 to 500 (ps/nm)/dB, a polarization mode dispersion (PMD) of not more than 0.15 ps/ 2ROOT km, and an effective core area (Aeff) of 19 to 50 mu m<2> when the wavelength of the light propagated through the center core (11) is the 1.55 mu m band, and a bending loss at a diameter of 20 mm of not more than 5 dB/m. <IMAGE></p> |
