Patent ID: 8145025
Filing Date: 2012-03-27
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 0.25×10 wherein, at a wavelength of 1260 nanometers, the LP11 mode of the optical fiber is attenuated to 19.3 dB at a length less than 90 meters.