Patent ID: 6928211
Filing Date: 2005-08-09
Classification: G02B

Abstract:
1. An optical fiber comprising: a core that has a substantially uniform first refractive index; and a cladding that is located outside the core and that has a substantially uniform second refractive index; wherein an outer diameter of the core is in a range of 4.5 to 5 μm; wherein a relative refractive index difference between the first refractive index and the second refractive index when the second refractive index is taken as a reference is in a range of 0.4 to 0.8%; wherein a chromatic dispersion at a wavelength of 1550 nm is in a range of 2 to 6 ps/nm/km; and wherein an effective area at a wavelength of 1550 nm is 40 μm