Patent ID: 7889960
Filing Date: 2011-02-15
Classification: G02B

Abstract:
1. A single-mode optical fiber, comprising: a central core surrounded by an outer optical cladding, the central core having a radius r an intermediate cladding positioned between the central core and the outer optical cladding, the intermediate cladding having a radius r a depressed trench positioned between the intermediate cladding and the outer optical cladding, the depressed trench having a radius r wherein, at a wavelength of 1310 nanometers, the optical fiber has a nominal mode field diameter (MFD) between 8.6 microns and 9.5 microns; wherein, at a wavelength of 1550 nanometers, the optical fiber has bending losses less than 0.15 dB/turn for a radius of curvature of 5 millimeters; and wherein the optical fiber has standard and straight cable cut-off wavelengths of 1260 nanometers or less, measured as the wavelength at which the attenuation of the LP11 mode is greater than or equal to 19.3 dB after propagation over 22 meters of fiber.