| 摘要 |
<p>An optical waveguide fiber having an effective area of greater than about 60 µm<2> at a wavelength of about 1550 nm, a dispersion slope of less than 0.07 ps/nm<2>/km at a wavelength of about 1550 nm, and a zero-dispersion wavelength of less than about 1500 nm. In preferred embodiments, the optical fiber has a mode field diameter greater than 9 µm at 1550 nm and includes a first core region with a positive relative refractive index, a first annular core region with a positive relative refractive index, and a second annular core region having a negative refractive index, wherein the second annular core region begins at a radius greater than the mode field diameter and ends at a radius less than about 2.5 times the mode field diameter. Cabled cutoff wavelengths are less than about 1300 nm.</p> |
