Corning Incorporated
SINGLE-MODE FIBER WITH LOW DISPERSION SLOPE

Abstract:

A optical fiber comprising a central core region having an outer radius r.sub.1 of 3 .mu.m to 7 .mu.m, and a maximum refractive index .DELTA..sub.1 of 0.25% to 0.5% and an alpha (a) profile of 1 to 20; a cladding region comprising (i) a first inner cladding region surrounding the core, having a refractive index .DELTA..sub.2 of -0.25% to 0.05% and a radius r.sub.2 of 6 .mu.m to 15 .mu.m, (ii) a second inner cladding region, surrounding the first inner cladding region, having a refractive index .DELTA..sub.3 of -0.1% to 0.2% and a radius r.sub.3 of 7 .mu.m to 15 .mu.m, and (iii) an outer cladding region, surrounding the second inner cladding region, having a refractive index .DELTA..sub.4 between -0.05% to 0.1%; wherein the optical fiber exhibits a cable cutoff of less than 1260 nm, a mode field diameter at 1310 nm of greater than 8.2 microns.