A novel optical waveguide fiber having low total dispersion slope. relatively large mode field diameter, larger effective area, and a relatively simple core profile design is disclosed. The core refractive index profile comprises three segments. The adjustability of the height, width and location of the three core index profile segments, provides sufficient flexibility to mee t a specification which calls for a dispersion shifted waveguide fiber capable of limiting four photon mixing or self phase modulation. The novel waveguide IS characterized by a mode field diameter ~ 7.5 microns and a total dispersion slope ~ 0.070 ps/nm2-km.
DISPERSION SHIFTED OPTICAL WAVEGUIDE