PCT No. PCT/US97/12136 Sec. 371 Date Dec. 10, 1997 Sec. 102(e) Date Dec. 10, 1997 PCT Filed Jul. 14, 1997 PCT Pub. No. WO98/04941 PCT Pub. Date Feb. 5, 1998A dispersion compensating single mode optical waveguide fiber designed to change the wavelength window of operation of a link from 1310nm to 1550 nm. The dispersion compensating waveguide fiber is characterized by a core glass region refractive index profile comprised of at least three segments. The segment on the waveguide center has a positive relative refractive index. At least one segment spaced apart from the waveguide centerline has a negative refractive index.
Dispersion compensating single mode waveguide