Patent ID: 8687932
Filing Date: 2014-04-01
Classification: G02B

Abstract:
1. A trench-assisted optical fiber, optimized for figure-of-merit (FOM) performance, comprising a core region having a longitudinal axis, a shelf region surrounding said core region, a cladding region surrounding said shelf region, said core and shelf and cladding regions configured to support and guide the propagation of signal light in a fundamental transverse mode in said core and shelf regions 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 0.185 dB/km; and a refractive index profile having a figure of merit (FOM) frontier distance less than about 0.5 dB, wherein the FOM frontier distance is defined as=(A 0 +A 1 · core delta 0.5 +A 3 · shelf width+A 4 · trench delta+A 5 · trench volume+A 6 · outer trench width+A 7 · outer trench delta+A 8 · trench delta· trench width+A 9 · trench delta· outer trench width+A 10 · trench delta· outer trench delta) 2 , wherein: A A A A A A A A A A