Patent ID: 6801699
Filing Date: 2004-10-05
Classification: G02B

Abstract:
An optical fiber comprising:a central core region disposed about a centerline and extending to a radius R1, the central core region having a local minimum relative refractive index percent &Dgr;1, LM located at a radius R1, LM on or near the centerline and a maximum relative refractive index percent &Dgr;1, MAX located at a radius R1, MAX, wherein R1, MAX>R1, LM; and a clad layer surrounding the central core region; wherein the ratio &Dgr;1, LM/&Dgr;1, MAX is greater than 0.65 and less than 1.0; and wherein the optical fiber exhibits an effective area not less than 115 &mgr;m2 at a wavelength of 1550 nm and an increase in attenuation induced by one turn of said optical fiber about a 32 mm diameter mandrel less than about 0.5 dB at a wavelength of 1550 nm.