Corning Incorporated
Low loss wide bandwidth optical fiber

Abstract:

A single mode optical fiber includes: (i) a silica based core having a refractive index profile with an alpha (.alpha.) between 1.8 and 200, a relative refractive index .DELTA..sub.1max %, and an outer radius r.sub.1, wherein 7 microns>r.sub.1.gtoreq.4.5 microns, the core further comprising silica doped with chlorine, wherein the maximum chlorine concentration in the core is greater than 0.5 wt %; and wherein 1.40<X<1.7 where X=[(2.pi.n.sub.1(2.DELTA..sub.1max % r.sub.1.sup.2).sup.1/2/V.sub.c)+(0.0028*V.sub.m)], n.sub.1 is maximum refractive index of the core, V.sub.m is moat volume, and V.sub.c is a function of core alpha (.alpha.) and (ii) an outer cladding region surrounding the first cladding region, the outer cladding region having a relative refractive index .DELTA..sub.4% such that .DELTA..sub.1max>.DELTA..sub.4%.