Patent ID: 8600206

Claim:
A reduced-diameter optical fiber, comprising: a glass fiber; a substantially cured primary coating surrounding said glass fiber, said substantially cured primary coating possessing (i) an in situ modulus of less than 0.50 MPa and (ii) a glass transition temperature of less than −55° C., wherein said primary coating defines a primary coating layer; and a secondary coating surrounding said primary coating, wherein said secondary coating defines a secondary coating layer; wherein the optical fiber has an outer diameter of less than about 210 microns; and wherein, at a wavelength of 1310 nanometers, the optical fiber possesses absolute fiber attenuation of less than 2.0 dB/km as measured at 23° C., −40° C., and/or −60° C. in accordance with a modified IEC TR62221 fixed-diameter sandpaper drum test (“Reduced-Diameter Optical-Fiber Microbend Sensitivity Test”) in which a 440-meter fiber sample is wound in a single layer at about 1,470 mN on a 300-mm diameter quartz drum that is wrapped with 320-grit sandpaper to create a rough surface.