Optical waveguide fiber that is bend resistant and single mode at 1260 nm and at higher wavelengths. The optical fiber includes a core of radius R.sub.1 and cladding, the cladding having an annular inner region of radius R.sub.2, an annular ring region, and an annular outer region. The annular ring region starts at R.sub.2, and the ratio R.sub.1/R.sub.2 is greater than 0.40.