Patent ID: 6400879
Filing Date: 2002-06-04
Classification: G02B,H04B

Abstract:
A single mode optical waveguide fiber comprising:a core region having a surface, a diameter, a relative refractive index, &Dgr;o, and a refractive index profile, the single mode fiber having a long axis, the diameter being measured along a line perpendicular to the long axis and extending between two points on the core region surface; and, a clad layer surrounding and in contact with the core region surface, the clad layer having a refractive index profile, a relative refractive index &Dgr;c, and a minimum refractive index nc which is the reference index for the relative refractive indexes and &Dgr;o>&Dgr;c; in which, the core region refractive index profile is an &agr;-profile, the relative index of the core is in the range 0.016 to 0.040, and the core diameter is in the range 3 &mgr;m to 8 &mgr;m; and, in which, the waveguide has a zero dispersion wavelength and a non-linearity constant where; the zero dispersion wavelength, &lgr;o, is in the range of about 1500 nm to 1570 nm, and the non-linearity constant is in the range of about 3&it;â€ƒÃ—â€ƒ&it;10-16&it;cm2W&it;â€ƒ&it;to&it;â€ƒ&it;13&it;â€ƒÃ—â€ƒ&it;10-16&it;cm2W.&it;â€ƒ