Patent ID: 7027698
Filing Date: 2006-04-11
Classification: G02B

Abstract:
1. A single mode optical transmission fiber, the fiber having a core and a cladding, the core comprising: an inner core having a first refractive-index difference; and a first glass layer surrounding the inner core and having a second refractive-index difference, wherein the fiber has a peak refractive index difference value of less than or equal to approximately 0.0140, a zero-dispersion wavelength greater than 1450 nm and lower than 1500 nm, a dispersion value of between about 6 and 11 ps/nm/km at an operating wavelength of about 1560 nm and an effective area of at least 60 μm and further wherein the first refractive-index difference value is in the range of approximately 0.0100 to 0.0140 and the second refractive-index difference value is in the range of approximately 0.0005 to 0.0030.