Patent ID: 8768129
Filing Date: 2014-07-01
Classification: G02B

Abstract:
1. A trench-assisted optical fiber, comprising: a core region having a longitudinal axis, a shelf region surrounding said core region, a cladding region surrounding said shelf region, said core region and shelf region and cladding region configured to support and guide the propagation of signal light in a fundamental transverse mode in said core region and shelf region in the direction of said axis, the cladding region including an inner trench and an outer trench, wherein the optical fiber further comprises: a core effective area (Aeff) of between 135 μm an effective relative refractive index difference of greater than about 0.08%; a loss at 1550 nm of less than about 0.185 dB/km; a core radius less than about 6.8 μm; and a refractive index profile having a figure of merit (FOM) frontier distance less than about 0.7 dB, wherein the FOM frontier distance is defined as (A0+A1•core delta