Patent ID: 6816657
Filing Date: 2004-11-09
Classification: G02B,H01S,H04B

Abstract:
An optical fiber having a generally cylindrical core, an outer cladding, and a refractive index profile with respect to the outer cladding, wherein(a) the core has a diameter of between 3 and 6 microns (&mgr;m) and a difference (&Dgr;n) between the refractive index of the core and the outer cladding is between 0.015 and 0.035; (b) the index profile includes a trench region adjacent the circumference of the core; and (c) wherein the width of the trench region is about 1.71 um and a difference (delta n) between the refractive index of the trench and the outer cladding is between âˆ’0.005 and âˆ’0.015.