Patent ID: 7502540
Filing Date: 2009-03-10
Classification: G02B

Abstract:
1. An optical fiber, comprising: a core region; and a cladding region, the cladding region including a first cladding region on outer circumference of the core region, the first cladding region including a main-medium region and a sub-medium region having a refractive index lower than a refractive index of the main-medium region, the sub-medium region includes wherein a mode field diameter at a wavelength of 1550 nanometers is equal to or larger than 6 micrometers and equal to or smaller than 11 micrometers. and a macro-bending loss with a curvature radius of 7.5 millimeters at the wavelength of 1550 nanometers is equal to or less than 0.1 dB/m.